Project Olympus
Server Power Supply
Specification
Author:John Siegler, Senior Electrical Power Engineer, Microsoft

Open Compute Project • Project Olympus Server Power Supply Specification

Revision History
Date

Description

11/1/2017

Version 1.0 Released to Project Olympus github© 2017 Microsoft Corporation.
As of November 1, 2017, the following persons or entities have made this Specification available under the Open Web
Foundation Final Specification Agreement (OWFa 1.0), which is available at http://www.openwebfoundation.org/legal/theowf-1-0-agreements/owfa-1-0
Microsoft Corporation.
You can review the signed copies of the Open Web Foundation Agreement Version 1.0 for this Specification at Project Olympus
License Agreements, which may also include additional parties to those listed above.

Your use of this Specification may be subject to other third party rights. THIS SPECIFICATION IS PROVIDED "AS IS." Thecontributors expressly disclaim any warranties (express, implied, or otherwise), including implied warranties of merchantability,
non-infringement, fitness for a particular purpose, or title, related to the Specification. The entire risk as to implementing orotherwise using the Specification is assumed by the Specification implementer and user. IN NO EVENT WILL ANY PARTY BE
LIABLE TO ANY OTHER PARTY FOR LOST PROFITS OR ANY FORM OF INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES OF ANY CHARACTER FROM ANY CAUSES OF ACTION OF ANY KIND WITH RESPECT TO THIS SPECIFICATION OR ITSGOVERNING AGREEMENT, WHETHER BASED ON BREACH OF CONTRACT, TORT (INCLUDING NEGLIGENCE), OR OTHERWISE,
AND WHETHER OR NOT THE OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
CONTRIBUTORS AND LICENSORS OF THIS SPECIFICATION MAY HAVE MENTIONED CERTAIN TECHNOLOGIES THAT ARE MERELYREFERENCED WITHIN THIS SPECIFICATION AND NOT LICENSED UNDER THE OWF CLA OR OWFa. THE FOLLOWING IS A LIST OF
MERELY REFERENCED TECHNOLOGY: INTELLIGENT PLATFORM MANAGEMENT INTERFACE (IPMI); I 2C IS A TRADEMARK AND
TECHNOLOGY OF NXP SEMICONDUCTORS ; EPYC IS A TRADEMARK AND TECHNOLOGY OF ADVANCED MICRO DEVICES INC.;ASPEED AST 2400/2500 FAMILY PROCESSORS IS A TECHNOLOGY OF ASPEED TECHNOLOGY INC.; MOLEX NANOPITCH, NANOPICOBLADE, AND MINI-FIT JR AND ASSOCIATED CONNECTORS ARE TRADEMARKS AND TECHNOLOGIES OF MOLEX LLC;
WINBOND IS A TRADEMARK OF WINBOND ELECTRONICS CORPORATION; NVLINK IS A TECHNOLOGY OF NVIDIA; INTEL XEONSCALABLE PROCESSORS, INTEL QUICKASSIST TECHNOLOGY, INTEL HYPER-THREADING TECHNOLOGY, ENHANCED INTELSPEEDSTEP TECHNOLOGY, INTEL VIRTUALIZATION TECHNOLOGY, INTEL SERVER PLATFORM SERVICES, INTEL MANAGABILITY
ENGINE, AND INTEL TRUSTED EXECUTION TECHNOLOGY ARE TRADEMARKS AND TECHNOLOGIES OF INTEL CORPORATION;SITARA ARM CORTEX-A9 PROCESSOR IS A TRADEMARK AND TECHNOLOGY OF TEXAS INSTRUMENTS; GUIDE PINS FROMPENCOM; BATTERIES FROM PANASONIC. IMPLEMENTATION OF THESE TECHNOLOGIES MAY BE SUBJECT TO THEIR OWN LEGALTERMS.

Open Compute Project • Project Olympus Server Power Supply Specification

Contents
1

Scope ..................................................................................................................................................... 7

2

Reference Documents........................................................................................................................... 7

3

2.1

Applicable Documents .................................................................................................................. 7

2.2

Order of Preference ...................................................................................................................... 8

General Functional Description ............................................................................................................ 9
3.1

System Implementations .............................................................................................................. 9

3.1.1
4

Project Olympus Compute Server ......................................................................................... 9Electrical Specification ........................................................................................................................ 10
4.1

AC Input....................................................................................................................................... 10

4.1.1

Voltage, Current, and Frequency ........................................................................................ 10

4.1.2

Hold-Up Time ...................................................................................................................... 10

4.1.3

AC Turn On Requirement .................................................................................................... 11

4.1.4

AC Turn Off Brownout Requirement................................................................................... 12

4.1.5

ITIC Requirement ................................................................................................................ 12

4.1.6

AC Line Fuses....................................................................................................................... 13

4.1.7

AC Inlet Connector .............................................................................................................. 13

4.1.8

Input Leakage Current......................................................................................................... 14

4.1.9

Input Power Rating ............................................................................................................. 15

4.1.10

Input Power Sharing............................................................................................................ 15

4.1.11Inrush Current ..................................................................................................................... 15

4.1.12

Power Factor ....................................................................................................................... 15

4.1.13Harmonic Susceptibility ...................................................................................................... 16

4.1.14

Modified Sine Waves .......................................................................................................... 16

4.1.15Harmonic Emissions ............................................................................................................ 16

4.1.16

Line Transient ...................................................................................................................... 17

4.1.17

Fast Transient Burst ............................................................................................................ 17

4.1.18

Radiated Immunity.............................................................................................................. 17

4.1.19Surge Immunity ................................................................................................................... 17

4.1.20Efficiency ............................................................................................................................. 17

4.2

Input Voltage Selector (IVS) Operation ....................................................................................... 18

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4.3

4.3.1

Battery Recharge Operation ............................................................................................... 19

4.3.2

Battery Protection ............................................................................................................... 19

4.3.3

Battery Self Discharge ......................................................................................................... 19

4.4

5

Battery Backup Operation........................................................................................................... 19

DC Outputs, Signal Outputs, and Control Outputs ..................................................................... 19

4.4.1

Output Power and Current ................................................................................................. 19

4.4.2

Output ORing/Output Capacitor isolation .......................................................................... 20

4.4.3

Standby Output ................................................................................................................... 20

4.4.4

Setpoint ............................................................................................................................... 20

4.4.5

Static Voltage Regulation .................................................................................................... 20

4.4.6

Ripple and Noise ................................................................................................................. 20

4.4.7

Dynamic Load Step.............................................................................................................. 20

4.4.8

Capacitive Loading .............................................................................................................. 21

4.4.9

Closed Loop Stability ........................................................................................................... 21

4.4.10Grounding ........................................................................................................................... 21

4.4.11

Common Mode Noise ......................................................................................................... 21

4.4.12

Soft Start ............................................................................................................................. 21

4.4.13

Zero Load Stability............................................................................................................... 21

4.4.14

Hot Swap Requirements ..................................................................................................... 22

4.4.15

Load Sharing ........................................................................................................................ 22

4.4.16

Timing Requirements .......................................................................................................... 22

PSU System Interconnect .................................................................................................................... 22
5.1

Remote On/Off ........................................................................................................................... 22

5.2

Fan Cooling, Speed Control ......................................................................................................... 23

5.3

Share ........................................................................................................................................... 23

5.4

I2C/PMBus................................................................................................................................... 23

5.5

PS_KILL ........................................................................................................................................ 23

5.6

PSU Alert ..................................................................................................................................... 24

Note 1: Pull up to 3.3V through 100K ohms ........................................................................................... 24
5.7

Blade Present (BLADE_PRESENT#) .............................................................................................. 24

5.8

Output Connector Pinout............................................................................................................ 24

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Open Compute Project • Project Olympus Server Power Supply Specification

5.8.1

Output Power Connector .................................................................................................... 24

5.8.2

Output signal Connector ..................................................................................................... 25

5.8.3

Battery Connector ............................................................................................................... 26

5.9

Protection Circuits....................................................................................................................... 26

5.9.1

Over Current Limit (OCL) ..................................................................................................... 26

5.9.2

Over Voltage Protection (OVP) ........................................................................................... 27

5.9.3

Over Temperature Protection (OTP) ................................................................................... 27

6

FRU Requirements .............................................................................................................................. 27

7

Software Interface Requirements ....................................................................................................... 27

8

LED Indicators ..................................................................................................................................... 27

9

Mechanical Specifications ................................................................................................................... 28
9.1

Dimensions.................................................................................................................................. 28

9.2

Cord Handle Retention ............................................................................................................... 30

10Environmental Requirements ......................................................................................................... 30

11

Reliability, Warranty, and Service ................................................................................................... 31

11.1

Reliability..................................................................................................................................... 31

11.2

Serviceability ............................................................................................................................... 31

11.3

Power Supply Returned for Repair ............................................................................................. 31

11.4

Cooling ........................................................................................................................................ 31

11.5

Mechanical Shock ....................................................................................................................... 32

11.5.1 Fixturing: The power supply subassembly may be rigidly clamped directly to the shock
equipment surface. ............................................................................................................................. 32
11.5.2 Operating: Half sine wave shock - 5 G, 11 ms duration, half sine wave shock in eachdirection of three mutually perpendicular axes. There shall be one shock input in each direction of
three mutually perpendicular axes for a total of six shock inputs...................................................... 32
11.5.3
11.6

Non-Operating: ................................................................................................................... 32

Vibration ..................................................................................................................................... 32

11.6.1 Fixturing: The power supply subassembly may be rigidly clamped directly to the shock
equipment surface. ............................................................................................................................. 32
11.6.2

Operating: ........................................................................................................................... 33

11.6.3

Non-Operating: ................................................................................................................... 33

11.7

Transportation and Handling Robustness................................................................................... 33

11.8

Electrostatic Discharge................................................................................................................ 34

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12

Agency Approvals and Product Regulatory Requirements ............................................................. 34

12.1

Safety Compliance ...................................................................................................................... 35

12.2

Energy Compliance ..................................................................................................................... 35

12.3

Component Requirements .......................................................................................................... 35

12.4

EMC Requirements and Approvals ............................................................................................. 36

12.5

Environmental Compliance ......................................................................................................... 37

12.6

Markings and Identification ........................................................................................................ 37

13

Quality Assurance and Reliability Provisions .................................................................................. 38

13.1

AC Inlet and Exterior Face ........................................................................................................... 38

13.2

Chassis and Chassis Finish ........................................................................................................... 38

13.3

Power Supply Fan/Location/Orientation .................................................................................... 38

13.4

Acoustic Requirement ................................................................................................................. 38

13.5

Materials ..................................................................................................................................... 38

13.6

Weight ......................................................................................................................................... 39

Table of Tables
Table 1: Applicable Documents .................................................................................................................... 7
Table 2: AC Input Rating per module .......................................................................................................... 10
Table 3. AC Inlet Connector Definition ....................................................................................................... 13
Table 4. Input Power Sharing ...................................................................................................................... 15
Table 5 Power Factor Requirements........................................................................................................... 16
Table 6: THD Requirements ........................................................................................................................ 16
Table 7: Efficiency ....................................................................................................................................... 17
Table 8: Output Power and Current............................................................................................................ 20
Table 9: Setpoints ....................................................................................................................................... 20
Table 10: Static Voltage .............................................................................................................................. 20
Table 11: Dynamic Load Step ...................................................................................................................... 20
Table 12: Capacitive Loading ...................................................................................................................... 21
Table 13: Power On/Off .............................................................................................................................. 22
Table 14: I2C/PMBus ................................................................................................................................... 23
Table 15: PS_Kill .......................................................................................................................................... 24
Table 16: PSU Alert ..................................................................................................................................... 24
Table 17 Output Power Connector Pinout.................................................................................................. 24
Table 18 Output Signal Connector .............................................................................................................. 25
Table 19: Operating Environment Requirements ....................................................................................... 30
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Open Compute Project • Project Olympus Server Power Supply Specification

Table 20. Transportation and Handling Robustness ................................................................................... 33
Table 21: Component Requirements .......................................................................................................... 35

Table of Figures
Figure 1. Block Diagram ................................................................................................................................ 9
Figure 2. Project Olympus Server................................................................................................................ 10
Figure 3. ITIC Curve ..................................................................................................................................... 13
Figure 4. Output Power Connector Pinout ................................................................................................. 25
Figure 5 Power Supply Dimensions............................................................................................................. 29

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1

Scope
This document defines the functional requirements for a 1000W 12.25VDC output, power supply
Unit (PSU) operating off an AC Hi-Line three phase input, intended for worldwide use in electronic
data processing equipment.

2

Reference Documents
This section lists the applicable reference documents and defines the order of preference.

2.1

Applicable Documents
Table 1 lists the documents that form a part of this specification to the extent specified herein.

Table 1: Applicable Documents

Reference

Description

ANSI C63.4“American National Standard for Methods of Measurement of Radio-Noise
Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9
kHz to 40 GHz.” American National Standards Institute (ANSI).

AS/NZS CISPR 32

http://www.acma.gov.au“Limits and methods of measurement of radio interference characteristics ofinformation technology equipment.” International Special Committee on RadioInterference (C.I.S.P.R.),CISPR 32CISPR 24

“Information technology equipment - Immunity characteristics - Limits andmethods of measurement”

GB 17625.1

Electromagnetic compatibility - Limits - Limits for harmonic current emissions(equipment input current < 16 A per phase)

GB 9254

Information technology equipment - Radio disturbance characteristics - Limits
and methods of measurement

CFR 47, Part 15“Unintentional Radiators”. Title 47 of the Code of Federal Regulations, Part 15,
FCC Rules, Radio Frequency Devices, Subpart B.

ICES-003

Information Technology Equipment — Limits and Methods of Measurement

CNS14336-1“Information technology equipment – Safety – General requirements”, Bureau ofStandard, Metrology and Inspection

CNS13438“Limits and Methods of Measurement of Radio Interference Characteristics ofInformation Technology Equipment”, Bureau of Standard, Metrology andInspection

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7/33

Reference

Description

EN 55032

Electromagnetic compatibility of multimedia equipment - Emission requirements

EN 55024“Information technology equipment – Immunity characteristics – Limits andMethods of measurement.” European Committee for Electro technicalStandardization (CENELEC)

IEC/EN/UL/CSA
60950-1“Safety of Information Technology Equipment – Safety – Part 1: General
requirements”,

IEC/EN/UL/CSA
62368-1

Audio/video, information and communication technology equipment - Part 1:
Safety requirements

IS 13252-1“Safety of Information Technology Equipment – Safety – Part 1: General
requirements”

EN 61000-3-2“Electromagnetic Compatibility (EMC) Part 3-2 Limits – Limits for Harmonics
Current Emissions (Equipment input current 16A per phase).”IEC 61000-4
Sections 2 – 6, 11“Electromagnetic compatibility (EMC) – Part 3-3 Limits – Limitation of voltage
fluctuations and flicker in low-voltage supply systems for equipment with rated
current <= 16 A”“Safety of Information technology equipment”, Standardization Administration of
China“Electromagnetic Compatibility (EMC) – Part 4: Testing and measurement
techniques.”

IPC-A-610“Specification, Acceptability of Electronic Assemblies.”

MIL HDBK 217F

“Reliability Prediction of Electronic Equipment.” U.S. Military Standard.

Taiwan EMC Law“Commodity EMC Regulation” (Taiwan EMC Law), Bureau of Standards,
Metrology, and Inspection under auspices of the Ministry of Economic Affairs,
URL:http://www.bsmi.gov.tw .

EN61000-3-3

GB 4943.1

2.2

Order of Preference
In the event of a conflict between this specification and references cited herein, this specification
shall take precedence.

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Open Compute Project • Project Olympus Server Power Supply Specification

3

General Functional Description
This specification describes the power supply requirements for the Project Olympus system. The
power supply Unit shall be a dual three phase input and 1000W output. The system consists of an
IVS section receiving dual inputs of three single phases (6 total) and three 340W power supply
modules (PSM’s) in parallel with a total maximum output of 1000W. Each PSM will be powered offof one of the three IVS outputs. The power supply load/output will not be hot pluggable but AC
input will. There will be an optional battery that will be contained in the PSU chassis. Failure of asingle PSM or loss of a single phase will not affect system operation for loads 680W and below.
Power supply inputs will be hot swappable. Outputs will not be hot swapped. The power supply
outer dimensions are depicted in section 9.1. If 2 PSM’s fail and total load is equal to or less than
340W the remaining module should continue to operate.

Figure 1. Block Diagram

3.1

System Implementations

3.1.1 Project Olympus Compute Server
The Project Olympus Server Power Supply will be installed in a compute server chassis and willblindmate to a managed PDU for input AC power and signals and communications between therack manager and the compute server and PSU. Output Power and signals to server via power andsignal harness.

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Figure 2. Project Olympus Server

4

Electrical Specification
This section details the electrical specification.

4.1

AC Input
AC input will be either 3 phase 415/400VAC Wye or 208VAC Delta with a single phase going to eachof the three 340W modules. Note that the power supply needs to be able to operate under three
single phases to each module with the three sine waves all in phase (no 120Hz lag).

4.1.1 Voltage, Current, and Frequency
The individual phase power supplies shall operate within all specified limits over the following input
voltage range as defined below and in Table 2.
WYE: 311VAC-457VAC, 5 Wire 3L+N+PE, 47Hz-63Hz, 2.4 A Max
Delta: 187VAC-228VAC, 4 Wire 3L+PE 47Hz-63Hz, 2.4 A Max
Table 2: AC Input Rating per module

Parameter

Min

Rated

Max

Voltage (240)180 Vrms

200-240 Vrms

264 Vrms

Frequency

47 Hz

63 Hz

340WPSU max input current
at min Vrms
2.4Arms

4.1.2 Hold-Up Time
This section defines the hold-up time for version 1 (no Battery) and version 2 (With Battery).
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Open Compute Project • Project Olympus Server Power Supply Specification

4.1.2.1

No Battery installed

Each individual module shall operate at up to 340W with no interruptions for the following input
variations:
20ms at 0V
500ms at 140VAC
10 Seconds at 160VAC
AC Line dropout is defined as input voltage drooping below minimum voltage thresholds as defined
above down to 0VAC for an indefinite amount of time. An AC Line dropout shall not cause an ACline breaker to open. For line drops of less than 20ms the power supply shall operate normally. Forline drops greater than the times listed above the power supply may shutdown and then shallrecover and turn on normally consistent with turn on requirements specified in this document. An
AC Line dropout shall not cause input current to exceed 120% of maximum rated steady state input
current.
4.1.2.2

With Battery
The battery shall be able to supply enough energy for an output power of 680W for one second
then operate for the specified times and loading given in the table below. Note that the power
supply should continue to operate off of battery power after meeting the minimum timing below
until the battery reaches it’s minimum operating voltage or damage to the PSU or battery would
occur if battery power continues.
OutputPower
Level (W)

Minimum
Run time(s)

Energy
(kJ)

100
150
200
250
300

800
533
400
320
267

80
80
80
80
80

4.1.3 AC Turn On Requirement
This section describes the AC turn on requirement for version 1 and version 2 with batteries
disabled.
The power supply shall return to normal power up state after a slow recovery condition. The
recovery shall be tested in all valid redundant power system configurations. With the test loads
configured for 680W system DC output in resistive mode, the AC line voltage shall be increased

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from 0VAC to 180VAC/60Hz at a constant rate over 30 minutes. When VAC input is within proper
range the PSU shall turn on and assume full load consistent with the soft start requirements.

4.1.4 AC Turn Off Brownout Requirement
This section describes the AC turn off brownout requirement for version 1 and version 2 withbatteries disabled.
The power supply shall return to normal power up state after a slow brownout condition. The
brownout condition shall be tested with all valid redundant power system configurations using theend use system/s. While the power system is operating at full rated DC load, the AC line voltage
shall be reduced from 180VAC/60Hz to 0VAC at a constant rate over a period of 30 minutes. The
power shall be then reapplied at 180VAC/60Hz.
When VAC input is within proper range the PSU shall turn on and assume full load consistent withthe soft start requirements. This requirement applies to single power supplies only.

4.1.5 ITIC Requirement
The power supply shall run without interruption when exposed to any of the power variations
shown in the ITIC curve below. The transient portion of the chart depicted in red shall be instead as
specified EN61000-4-4 Electrical Fast Transients and EN61000-4-5 Electrical Surge, 2000V L-PE,
1000V L-L.

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Open Compute Project • Project Olympus Server Power Supply Specification

Figure 3. ITIC Curve

4.1.6 AC Line Fuses
The AC Line Fuses shall be acceptable for all safety agency requirements. The fuse shall be fast blow
type. The fuse shall not blow unless component failure is encountered. The fuses shall not blow
under all line and load conditions.
The AC Line Fuses shall be rated appropriately to prevent nuisance blows.

4.1.7 AC Inlet Connector
AC inlet connector shall be an FCI PwrBlade 12S+1P+12LP part number 10106262-IC03002C_A or
10106262-IC03002LF or similar competitor’s connector. Drawing can be found in Project Olympus
PSU AC Connector Specification.
4.1.7.1

AC Inlet Connector Pinout
AC inlet connector pinout is listed below:

Table 3. AC Inlet Connector Definition

Description

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Pin
Number
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
A1
A2
A3
B1
B2
B3
C1
C2
C3
D1
D2
D3

WYE

Delta

Safety Ground
Safety Ground
Not Used
Not Used
Backup Feed
Backup Feed
NeutralPhase A
Backup Feed
Backup Feed
Phase C
Phase C
Default Feed
Default Feed
NeutralPhase A
Default Feed
Default Feed
Phase C
Phase C
Backup Feed
Backup Feed
NeutralPhase C
Backup Feed
Backup Feed
Phase B
Phase B
Default Feed
Default Feed
NeutralPhase C
Default Feed
Default Feed
Phase B
Phase B
Backup Feed
Backup Feed
NeutralPhase B
Backup Feed
Backup Feed
Phase A
Phase A
Default Feed
Default Feed
NeutralPhase B
Default Feed
Default Feed
Phase A
Phase A
LR_SELECTNODE_ID0
Analog Return
NODE_ID1
NODE_ID2
NODE_ID3
BLADE_THROTTLE#
BLADE_ENABLE#
BLADE_PRESENT#PSKILL (Short Pin)
NODE_ID4
NODE_ID5

4.1.8 Input Leakage Current
Maximum input leakage for each of the 3 340W PSU modules shall be less than 3.5 mA at 240VAC.

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Open Compute Project • Project Olympus Server Power Supply Specification

4.1.9 Input Power Rating
The power supply shall be rated for 1160W input power at 200VAC input (all three PSU’s
combined).

4.1.10 Input Power Sharing
The three input modules shall share the load so that input current sharing between modules meetsthe requirements in the table below:
Table 4. Input Power Sharing

Total
Input
Power
0-100W
100W325W
325W350W
350W400W
400W1100W

Input current
share
accuracy
within 100mA+/- 10%+/- 7.5%+/-5%+/- 3%

4.1.11 Inrush Current
AC line inrush current to each 340W module shall not exceed 9A peak at all line and load conditions
for maximum of 5 msec. after application of AC input. Measurement shall be taken 0.2ms after
application of AC input. The inrush current shall not exceed the 50% I2t derating of any component
in series with the inrush current.
The power supply shall meet the inrush requirements for any rated AC voltage, during turn on at
any phase of AC voltage, during hot plug, during any AC dropout condition, over the specified
temperature range (Top), and during AC power cycling. The AC power cycling test condition isdefined as cycling the AC power off and back on after the power supply has been operating at
maximum load and has reached thermal stability.
Version 1: The period between the AC power cycles could be anywhere between 20 ms to 10
seconds. During a line drop out situation the peak inrush current may be violated but no damage orreliability reduction may occur to any components the power supply.

4.1.12 Power Factor
The power factor shall be equal to or greater than 0.98 when measured at 240VAC, 47Hz to 63 Hz
input. Measurement shall be performed with maximum output load and with source impedance of

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less than 0.1 Ω. It is expected that power factor shall be greater than 0.98 at line voltages less than
240VAC at maximum output load condition.
Power factor shall also meet requirements in table below:
Table 5 Power Factor Requirements

Output Current
8.3
16.6
41.5
81.6

Minimum Power Factor
.65
.8
.9
.98

4.1.13 Harmonic Susceptibility
Harmonic distortion of up to 10% THD must not cause the power supply to go out of specified
limits. The power supply shall be capable of start-up (power-on) with full rated power load, at line
input as low as 180VAC.
The power supply internal circuitry shall limit maximum input current to 150% max rated at all
input and operating ambient conditions and output fault conditions.

4.1.14 Modified Sine Waves
The power supply shall operate when the AC input is a variant of a sine wave such as from a UPS(trapezoidal and square waves excluded). The output shall remain within regulation under all loadconditions under modified sine wave. Under conditions below the power supply may disable theoutput:•••Rise time on the input exceeding 2V/us
Input voltage zero crossing lasting greater than 4 ms.
Peak of the modified sine wave voltages consistently exceeding 375V

Under modified sine wave conditions the power supply does not need to meet conducted EMI
limits and harmonics.

4.1.15 Harmonic Emissions
The power supply shall incorporate universal input with active power factor correction, which shall
reduce line harmonics in accordance with IEC EN61000-3-2 and JEIDA MITI standards. It is desiredthat the power supply also meet the THD requirements across the input voltage range shown in
Table 6 below.
Table 6: THD Requirements

Output load (% of max output load)

Maximum ITHD (%)

5-15

20

15-30

10

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Open Compute Project • Project Olympus Server Power Supply Specification

30-1005

4.1.16 Line Transient
The power supply shall operate within specifications under the following conditions:••

Transients as defined in IEC 61000-4-4.
Transients as defined in IEC 61000-4-5.
(Up to and including 2 kV limits and phases 0⁰, 90⁰, 180⁰, and 270⁰.

4.1.17 Fast Transient Burst
The power supply shall comply with the limits defined in EN55024: 1998/A1: 2001/A2: 2003 using
the IEC 61000-4-4: Second edition: 2004-07 test standard and performance criteria B defined in
Annex B of CISPR 24.

4.1.18 Radiated Immunity
The power supply shall comply with the limits defined in EN55024: 1998/A1: 2001/A2: 2003 using
the IEC 61000-4-3: Edition 2.1: 2002-09 test standard and performance criteria A defined in Annex
B of CISPR 24.

4.1.19 Surge Immunity
The power supply shall be tested with the system for immunity to AC Unidirectional wave; 2kV line
to ground and 1kV line to line, per EN 55024: 1998/A1: 2001/A2: 2003, EN 61000-4-5: Edition
1.1:2001-04. The pass criteria include: No unsafe operation is allowed under any condition; allpower supply output voltage levels to stay within proper spec levels; No change in operating stateor loss of data during and after the test.

4.1.20 Efficiency
The power supply shall meet the efficiency requirements given in Table 7.
** Efficiency is important and cost effective efficiency improvements shall be evaluated before thepower supply design is finalized. The typical load range will be 50%- 80% PSU loading and 95%
under system fault conditions. Special consideration will be given for efficiency improvements inthis area of operation. Fan can be powered externally for efficiency test. IVS losses may bedisregarded when calculating efficiency.
Table 7: Efficiency

Input voltage (VAC RMS)

Output load (A)Minimum efficiency (%)

200

16.6

89

200

16.6

91

200

41.5

93

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4.2

200

83

92

208

8.3

89

208

16.6

92

208

41.5

94

208

83

92

230

8.3

89

230

16.6

92

230

41.5

94

230

83

92

240

8.3

89

240

16.6

92

240

41.5

94

240

83

92

Input Voltage Selector (IVS) Operation
The PSU shall normally run off of Default Feed. When Default Feed drops below 180VAC for morethan 8ms, the IVS will switch to Backup Feed within 12ms. The LEDs shall be driven
green/yellow/green continuously while operating on Backup Feed as described in LED section.
When AC voltage on Default Feed is back in regulation, there will be a 10-20 second delay and thenpower shall be switched back to Default Feed. Note that if any single phase on Default Feed drops
out of regulation, all three phases must be switched to Backup Feed. In other words, all three IVS’s
will be synchronized so that all three switch together. Note that if while on Backup Feed, Default
Feed comes back and Backup Feed experiences an interruption, the 10-20 second switchback delay
is not required.
The power supply shall power up and operate normally when only one feed is initially applied.
Whether Default Feed or Backup Feed.
Relay contact switching failure: If a feed is lost and the IVS switches to the other feed, if one of the
3 modules does not stay powered up, it will be assumed one of the relays operating on that module
has a welded contact. Under this situation, the relays for the unpowered module shall be switchedback to the unpowered feed. Upon PSON toggle or AC removal, the IVS can retry to operate all
modules off the operating feed. If the module fails to operate, the relays for that module shallagain be switched to the non-activated feed.

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Open Compute Project • Project Olympus Server Power Supply Specification

4.3

Battery Backup Operation
This section describes the battery backup operation.

Following are the battery backup requirements. Note that minimum battery operation ambient air
temperature will be 20C.
1. The battery shall use 8 Panasonic UR18650RX cells or competitor’s cells with similar or
better performance with approval from Microsoft. Key parameters are Capacity,
impedance, self-discharge, aging.
2. Partial discharge duty cycle shall be 1 discharges per year at a 5 second discharge.
3. Full discharge duty cycle shall be 1 discharge per 2 years for condition in 4.1.2.2.
4. The power supply shall be capable of, when given the command via PMBUS, to go tobattery power for one to three seconds then return to AC power. This is to check for weakor bad cells within the battery pack. See firmware section 9 for specific commanddescription and register location.

4.3.1 Battery Recharge Operation
4.3.1.1

Battery Recharge
The battery recharge shall be limited to 30W or higher approved Microsoft limit and is a function of
Input Power Limit (IPL) Set Point. If the IPL is activated the battery recharge shall be disabled.

4.3.2 Battery Protection
If at any time during discharge the state of charge of any battery cell drops to a level equal to theminimum voltage allowed by the manufacturer, the 12V output should be disabled immediately toprevent battery damage.

4.3.3 Battery Self Discharge
The battery shall not self discharge more than 20% of its capacity annually when in storage.

4.4

DC Outputs, Signal Outputs, and Control Outputs
This section describes the DC outputs.

4.4.1 Output Power and Current
Across the nominal input voltage range, the PSU output power shall be as specified in Table 8. The
power supply shall meet static and dynamic voltage regulations requirements across the load
range.

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Table 8: Output Power and Current

OutputMin

Max (N+1)

Max (N)

Unit

12.25VDC

0.1

56

83

A

4.4.2 Output ORing/Output Capacitor isolation
Not required

4.4.3 Standby Output
The power supply shall not provide a standby output.

4.4.4 Setpoint
The voltage setpoint shall be as specified in Table 9.
Table 9: Setpoints

ParameterMin

Set point nominal

Max

Units

Current (A)+12V

12.127

12.25

12.373Vrms

5

4.4.5 Static Voltage Regulation
The output voltage regulation output must stay within the following voltage limits when operating
at all load and input line voltages across the ambient temperature limits under steady state
conditions.
Table 10: Static Voltage

ParameterMin

Set point nominal

Max

Units

12V Output

12.00

12.25

12.5

Vrms

4.4.6 Ripple and Noise
The maximum allowed ripple/noise output of the power supply is defined in 120mVp-p. This ismeasured over a bandwidth of 10Hz to 20MHz at the power supply output connectors. A 10uF
tantalum capacitor in parallel with a 0.1uF ceramic capacitor is placed at the point of measurement.

4.4.7 Dynamic Load Step
The output voltages shall remain within Dynamic voltage limits specified for the step loading andcapacitive loading specified below. The load transient repetition rate shall be tested between 50Hz
and 5kHz at duty cycles ranging from 10%-90%. The load transient repetition rate is only a test
specification. The delta step load may occur anywhere within the MIN load to the MAX loadconditions. Dynamic voltage limits are 11.70VDC-12.8VDC.
Table 11: Dynamic Load Step

OutputDelta step load

Transient load rate

Capacitance test load

+12V

60% of maximum rated load

0.25A/usec

3500uF +/-5%

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Open Compute Project • Project Olympus Server Power Supply Specification

1%-61% and 40% to 100%

4.4.8 Capacitive Loading
The power supply shall be stable and meet all requirements with the following capacitive loading
ranges.
Table 12: Capacitive Loading

Output

Min

Max

Units

+12V

200

5000

uF

4.4.9 Closed Loop Stability
The power supply shall be unconditionally stable under all line/load/transient load conditions
including capacitive load ranges specified in Section 4.6. A minimum of: 45 degrees phase marginand -10dB-gain margin is required. The power supply manufacturer shall provide proof of the unit’s
closed-loop stability with local sensing through the submission of Bode plots. Closed-loop stability
must be ensured at the maximum and minimum loads as applicable.

4.4.10 Grounding
The output ground of the pins of the power supply provides the output power return path. The
output connector ground pins shall be connected to the safety ground (power supply enclosure).
This grounding should be well designed to ensure passing the max allowed Common Mode Noiselevels.
The power supply shall be provided with a reliable protective earth ground. All secondary circuits
shall be connected to protective earth ground. Resistance from the input receptacle to chassis shallnot exceed 100 mΩs. This shall be tested 100%.

4.4.11 Common Mode Noise
The Common Mode noise on any output shall not exceed 350mV pk-pk over the frequency band of
10Hz to 20MHz. The measurement shall be made across a 100Ω resistor between each of DC
outputs, including ground at the DC power connector and chassis ground (power subsystem
enclosure).

4.4.12 Soft Start
The Power Supply shall contain control circuit which provides monotonic soft start for its outputs
without overstress of the AC line or any power supply components at any specified AC line or loadconditions.

4.4.13 Zero Load Stability
When the power subsystem operates in a no load condition, it does not need to meet the output
regulation specification, but it must operate without any tripping of over-voltage or other fault
circuitry. When the power subsystem is subsequently loaded, it must begin to regulate and source

http://opencompute.org

current without fault. Continuous operation at no load shall not damage or reduce reliability of thepower supply.

4.4.14 Hot Swap Requirements
Hot swapping of the input is required. Output load will not be hotswapped.

4.4.15 Load SharingNA

4.4.16 Timing Requirements
TBD

5

PSU System Interconnect
This section describes the PSU system interconnect.

5.1

Remote On/Off
The PSU shall be ON when PS_ON# is pulled low below 0.8VDC. PSON shall be 3.3V or 5V tolerant

Table 13: Power On/Off

Signal name

22

Input
/
outp

Open
collector

3V3
or 5V
logic

Signalpull upresistor
value

Logic
low
max
(V)

Logic
high
min
(V)

Sink/
sourcecurrent
max

Rise
time
max
(nsec)

Fall
time
max
(nsec)

Cmax
external
to PSU

Peaknoise(mVpkpk)

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Open Compute Project • Project Olympus Server Power Supply Specification

ut to
PSU

PS_ON#

5.2

In

NO

YES

49.9K
+/- 5%

0.8

2.06

N/A

100

100

no

250

Fan Cooling, Speed Control
The PSU shall incorporate a fan(s) for PSU cooling. The PSU will monitor critical temperatures andadjust fan speed to prevent thermal damage but run a slow as possible to save energy. Note thattwo or more fans are required. The power supply shall be able to run indefinitely with one fan
failure at 680W or below. Reliability and derating requirements do not have to be met while
operating on one fan. Fans can be set to maximum speed during a fan fail event. Note also thatcooling for the whole PSU must depend on internal fans only and cannot rely on any help fromsystem fans. Also note that sheet metal on the battery side of PSU can have ambient air adjacentoutside the PSU in the server up to 60C. It is recommended that some PSU airflow be directed
between the battery and the chassis in this area to keep the battery cool.

5.3

Share
There is no sharing requirement between PSU’s.

5.4

I2C/PMBus
No address pin is needed

Table 14: I2C/PMBus

5.5

3V3
logic

Signalpull upresistor
value

Logic
low
max
(V)

Logic
high
min
(V)

Sink/
sourcecurrent
max
(mA)

Rise
time
max
(usec)

Fall
time
max
(nsec)

Cmax
external
to PSU
(pF)

Peak
noise
(mVpkpk)

NO

YES

6.81K
+/-20%

0.8

2.0

6

1

250

120

250mV

I/O

NO

YES

6.81K
+/-20%

0.8

2.0

6

1

250

120

250mV

Out

YES

YES

100k
+/-20%

0.8

2.0

N/A

1

250

Signal
name

Input/
outputto PSU

Open
collector

SDA

I/O

SCL
Alert

250mV

PS_KILL
The power supply shall default to 12V being disabled between 180ms and 200ms of PS Kill goinghigh. There will be a PS_KILL over ride register that can be written to that will change the power
supply behavior to switch from AC mains to battery power within 750us of PS_KILL going high.

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During this operation the PSU shall act as this is a normal loss of AC power and run as specified in
4.1.2.2.
Table 15: PS_Kill

5.6

Signal
name

Input/
outputto PSU

Open
collector

PS_Kill
_EPO

In

NO

3V3
logic

Signalpull upresistor
value

Logic
low
max
(V)

Logic
high
min
(V)

Sink/
sourcecurrent
max
(mA)

Rise
time
max
(usec)

Fall
time
max
(usec)

Cmax
external
to PSU
(pF)

Peak
noise
(mVpkpk)

yes

10KOh
m

0.4

2.0V or
NC

0.5

250

2.5

0

250mV

PSU Alert
The signal shall be high until status change of the PSU. The signal shall remain low until the port isread or contents of register returns to original state. By default PSU_ALERT is only asserted for an
overcurrent event and event lasting longer than 10ms. Note that PSU Alert shall remain low until
reset even if fault goes away. Reset is accomplished via “clear_faults” command or AC power
cycling.

Table 16: PSU Alert

Signal
name

Input/
outputto PSU

Open
collector

3V3
logic

Signal pull up
resistor value

Logic
low
max
(V)

Logic
high
min
(V)

Sink
current
max
(mA)

Rise
time
max
(usec)

Fall timemax(usec)

Alert

Out

YES

YES

100k +/-20%

0.8V

2.0V

Note 1

1usec

250nsec

Cmax
external
to PSU
(pF)

Peak
noise
(mVpkpk)
250mV

Note 1: Pull up to 3.3V through 100K ohms

5.7

Blade Present (BLADE_PRESENT#)
This signal will be pulled up to 3.3V through a 100K ohm resistor. It will be pulled low in thecompute server.

5.8

Output Connector Pinout

5.8.1 Output Power Connector
The output power connector shall be a 24 pin molex minifit junior or equivalent.

Table 17 Output Power Connector Pinout

Output Power Connector Pinout
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Open Compute Project • Project Olympus Server Power Supply SpecificationPower

PSU Pin

12V

1

13

12V

2

14

12V

3

15

12V

4

16

12V

5

17

12V

6

18

Return7

19

Return8

20

Return9

21

Return10

22

Return11

23

Return1224

Figure 4. Output Power Connector Pinout

5.8.2 Output signal Connector
The output signal connector shall be a 18 pin molex milligrid series connector 878311828 or
Microsoft approved equivalent. The drawing is contained in Project Olympus PSU Signal
Connector Specification. Pin out below:
Table 18 Output Signal Connector

Pin
NumberSignal Name

http://opencompute.org

NOTES

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

BLADE_ENABLE#
LR_SELECTNODE_ID0
NODE_ID1
BLADE_THROTTLE#
BLADE_PRESENT#I2C_SCL
I2C_SDAI2C_GND
PS_ON#PSU_ALERT#PSU_LED0
PSU_LED1
NODE_ID2
NODE_ID3
NODE_ID4
NODE_ID5
Reserved

Pass through from PMDU
Pass through from PMDU
Pass through from PMDU
Pass through from PMDU
Pass through from PMDU
Pass through from PMDUPSU-Blade Comm
PSU-Blade Comm
PSU-Blade Comm

Green LED
Yellow LED
Pass through from PMDU
Pass through from PMDU
Pass through from PMDU
Pass through from PMDUNo Connection

5.8.3 Battery Connector
Battery connector can be any connector with final approval from Microsoft.

5.9

Protection Circuits
Protection circuits inside the power supply shall cause only the power supply’s main outputs to
shutdown. The PSU shall to continue operating under a fault protection condition and provide
communication via I2C to the system and be reported out to the TBD infrastructure. Loss ofinternal communication shall be a condition for latching off the output.
When a protection circuit shuts down the power supply, green LED shall change to solid yellow ifable otherwise unlighted status.

5.9.1 Over Current Limit (OCL)
The power supply shall provide limited output current to the load for protecting the power supply
from damage under indefinite over load conditions. OCL shall be set between 115% and 130% of
rated output current. Under an overcurrent condition for over 200ms, the power supply shall
employ hiccup mode (200ms on and 2 seconds off) for 5 cycles and if overcurrent isn’t cleared after
the 5th cycle, the power supply shall latch off (All timing accuracy above is +/- 20%). For shortcircuit situations, the power supply may latch off immediately. PSU_ALERT shall be asserted after

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Open Compute Project • Project Olympus Server Power Supply Specification

10ms or longer of a current over limit of 31.0 A or greater in any individual PSU module.
Overcurrent events under 10ms should be ignored.

5.9.2 Over Voltage Protection (OVP)The power supply over voltage protection shall be shutdown in a latch off mode upon an overvoltage condition. Over voltage is range is 13.6VDC to 15VDC.

5.9.3 Over Temperature Protection (OTP)
The power supply shall be protected against over temperature conditions caused by loss of fancooling or excessive ambient temperature which could cause internal part failures. In an overtemperature condition the PS shall shutdown protecting itself. When the temperature drops towithin safe operating limit for internal parts, the power supply shall restore power automatically.
The OTP circuit shall incorporate built in hysteresis such that the power supply does not oscillate on
and off due to temperature recovering condition. The OTP event shall be reported as a fault
condition.

6

FRU Requirements
The power supply FRU information shall reside on one of the PSU microcontrollers. Please refer to
PMBUS specification for details.

7

Software Interface Requirements
The power supply shall meet the requirements of Microsoft document: TBD
Bootloader: Note that PSU shall be capable of bootloading new primary and secondary firmware
without interruption of the 12V output. PSU output loading during bootloading shall be 680W or
less.

8

LED Indicators
The PSU will have a 2 signals that will drive a 1 dual color LED mounted on the system chassis.
Following are the LED drivers and power supply LED States:••

Power supply LED configuration
The power supply will have a single bi-color (Green-Yellow) LED output.
Power supply LED states
Single bi-colored LED configuration:o AC_OK & DC_OK (Power Good: Solid Green (Bi-color LED)o Fault (fault of any kind): Solid Yellow (Bi-color LED)o Internal Battery Charging: Continuous Blinking green at 2Hz

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ooOperating off internal battery: Continuous blinking yellow at 2Hz
One of two AC Feeds has failed: Yellow-Green-Yellow Continuous at 2Hz

Following is more detail about the LED indicators:
•

•

•

•

•

•

9

Fault indicator
This Bi-Color (Green-Yellow) LED is driven by internal circuitry and will illuminate yellow
when a power rail has failed, or –FAN_FAULT is low. The LED should not be illuminated if
the supply turns off due to PS_KILL. The LED will illuminate even if the power supply is in alatched state.
3mm Green-Yellow, Bi-color, LED applications: SunLed: XLUGY34M or Kingbright:
WP3WGYW or Microsoft approved equivalent.
Note: LED’s should be biased with a forward current (If) of 6 mA.
Power Good indicator
This Bi-Color Green-Yellow LED is driven by internal circuitry and will illuminate GREEN
whenever POWER GOOD is asserted.
AC Good indicator
This green LED is driven by internal circuitry and will illuminate GREEN whenever
VIN_GOOD is asserted.
Operating on internal battery
The Yellow LED will turn on and off at a 2 Hz rate whenever the power supply is operatingfrom internal battery power. This LED operation has priority over other fault indicators.
Internal battery charging
The green LED will turn on and off at a 2 Hz rate when the internal battery is charging. This
shall not occur during maintenance or top off charge. Other fault indicators will takepriority over this LED behavior.
IVS switched to side B
The LED will Blink Yellow-green-yellow… at a 2 Hz rate when one of the AC feeds has failed.

Mechanical Specifications
This section describes the mechanical specifications.

9.1

Dimensions
See Figure 5for power supply dimensions.

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Open Compute Project • Project Olympus Server Power Supply Specification

Figure 5 Power Supply Dimensions

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9.2

Cord Handle Retention
NA

10

Environmental Requirements
All materials in the product must not contain lead, mercury, cadmium, hexavalent chromium,polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE) in excess of the limits
specified in the Interim RoHS Compliance Specification Addendum to the XXX General Specification
for the Environment (GSE), XXX-00011-00. Upon retirement of the Interim RoHS Compliance
Specification Addendum, RoHS material restrictions will be specified directly in the GSE.
Documentation, test data, and certificates of compliance attesting to conformance to the RoHS
directive must be provided to Microsoft on request. Documentation and data from the supplier’s
supply chain which demonstrates and verifies compliance to the RoHS directive will be kept on fileand made available to XXX on request.

Table 19: Operating Environment Requirements

Specification

Requirement•

50°F to 118°F (10 °C to 48 °C), Battery 20°C-48°C•

Yearly weighted average < 104 °F (37 °C)

Operating
Inlet
Temperature

Non-Operating

ExhaustTemperature

Humidity

90% of year: < 80 °F (37 °C)•

10% of year: 80 °F (37 °C) to 108 °F (42 °C)•

50 Year extreme: 108 °F (42 °C) to 118 °F (48 °C)•

Maximum Rate of change: 18 °F (10 °C) / hour•

Allowable Derating guideline of 1 °F / 550 ft (0.55 °C / 168m) above 3000 ft•-40 °F to 140 °F (-40 °C to 60 °C)•

Rate of change less than 36 °F (20 °C) / hour•

Maximum values measured with an air-duct to prevent
mixing of air from other sources.

Operating•

115 °F (46 °C) , inlet <= 85 °F (29 °C)•

120 °F (49 °C) , inlet 85 °F (29 °C) to 90 °F (32 °C)•

125 °F (52 °C) , inlet 90 °F (32 °C) to 95 °F (35 °C)•

10% to 90% non-condensing•

Yearly weighted average: < 80% RH

Operating
•

30

•

•

90% of year: < 80%•

10% of year: 80% to 90%

Maximum dewpoint: 85 °F (29.4 °C)

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Open Compute Project • Project Olympus Server Power Supply Specification

Specification

Requirement
Non-Operating
Operating

AltitudeNon-Operating

11•

5% to 95% non-condensing•

100.4 °F (38 °C) maximum wet bulb temperature•

10000 ft (3050 m) maximum•

Rate of change less than 1500 ft/min (457 m/min)•

30000 ft (9144 m) maximum•

Rate of change less than 1500 ft/min (457 m/min)

Reliability, Warranty, and Service
The following component de-rating guidelines shall be follow an approved Derating Guideline.
The power supply and battery shall a support 6 year life cycle .
The life calculated with the environmental inlet temperature and cycle at power loads of 75% of
max continues load at a nominal of 230VAC input line voltage.

11.1 Reliability
The power supply and Battery shall have a minimum reliability at continuous operation of:••

1,000,000 hours MTBF at 66% load and 30C as calculated by Bell core RPP for eachindividual 340W Module.
Six (6) years operation life.

11.2 Serviceability
Field replacement of power supply is not planned.

11.3 Power Supply Returned for Repair
Power supplies returned to the vendor for repair, are returned for full credit.
Power supplies returned from vendor repair will be accepted by customer only after the vendor has
performed an additional burn-in of 4 hours min. at 35°C ± 5°C at maximum load and has re-tested
the power supply following the burn-in.

11.4 Cooling
The power supply will have at least 2 internal fans with fan speed control. The Fans will operate at
the minimum speed needed to keep all components within the thermal derating levels for all
loading and ambient conditions. Under fan fail condition the remaining fan(s) can be set tomaximum speed. Upon loss of all fans the PSU should operate until overtemp is reached and thenshall latch off.

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Backflow prevention: In addition to varying the fan speed for protecting the internal components,
the PSU shall also monitor inlet air temperature and if inlet temperature goes above 45C, fan speed
shall increase to keep inlet air temperature at 45C or below.

11.5 Mechanical Shock11.5.1 Fixturing: The power supply subassembly may be rigidly clamped directly to the shock
equipment surface.
11.5.2 Operating: Half sine wave shock - 5 G, 11 ms duration, half sine wave shock in eachdirection of three mutually perpendicular axes. There shall be one shock input in eachdirection of three mutually perpendicular axes for a total of six shock inputs.

11.5.3 Non-Operating:
11.5.3.1 Half sine wave shock - 140 G, 2 ms duration, half sine wave shock in each direction of threemutually perpendicular axes. There shall be one shock input in each direction of three mutuallyperpendicular axes for a total of six shock inputs.
11.5.3.2 Square wave shock - 40 G, 166 in/sec velocity change, square wave shock in each direction of threemutually perpendicular axes. There shall be one shock input in each direction of three mutuallyperpendicular axes for a total of six shock inputs.

11.6 Vibration
11.6.1 Fixturing: The power supply subassembly may be rigidly clamped directly to the shock
equipment surface.

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Open Compute Project • Project Olympus Server Power Supply Specification

11.6.2 Operating:
11.6.2.1 Sinusoidal Vibration: - 0.25 G zero-to-peak, 10 to 500 Hz, 0.25 oct/min in each of three mutuallyperpendicular axes. The test duration shall be one sweep from 10 to 500 to 10 Hz in each of threemutually perpendicular axes.
11.6.2.2 Random Vibration: Random Vibration - 0.002 G2/Hz, 10 to 500 Hz, nominal 1.0 Grms in each of
three mutually perpendicular axes. The test duration shall be one hour/axis for a total test
duration of three hours.

11.6.3 Non-Operating:
11.6.3.1 Sinusoidal Vibration - 0.75 G zero-to-peak, 10 to 500 Hz, 0.5 oct/min. The test duration shall be one
sweep from 10 to 500 to 10 Hz in each of three mutually perpendicular axes.
11.6.3.2 Random Vibration - 0.008 G2/Hz, 10 to 500 Hz, nominal 2.0 Grms in each of three mutuallyperpendicular axes. The test duration shall be one hour/axis for a total test duration of threehours.

11.7 Transportation and Handling Robustness
The power supply must have the ability to successfully pass shock and vibration tests. These tests
are meant to simulate normal transportation and handling conditions that the server might
encounter.
Table 20. Transportation and Handling Robustness

Specification(if applicable)

NA

NA

Telcordia GR63-CORE,
Section 5.3.1

Packaged/unpackaged

Details

Pass criteria

unpackaged• Non-operational• Random vibration, 10-500Hz,
1.87Grms• 15min/side, 6 sides tested

No visible damage
Server operational
when tested after
vibration

unpackaged,

•
•
•
•
•

Non-operational
Square wave
32g peak
6.85 m/s velocity change
6 sides

No visible damage
Server operational
when tested aftershock

packaged,• Non-operational• 1000mm drop
• 13 drops on sides, edges andcorners

No visible damage
Server operational
when tested after all
shockshttp://opencompute.org

Specification(if applicable)

NA

Packaged/unpackaged

Details

Pass criteria

packaged• Non-operational• 1.146 Grms
• Single server packageo 15 mins/sideo 6 sides tested• If bulk packagedo 1 hour on normal rest
surface

No visible damage
Server operational
when tested after
vibration

11.8 Electrostatic Discharge
The power supply shall withstand the following ESD conditions at any point on the power supply
enclosure.
•••8 kV with no abnormal operation, air discharge.
8 kV with no damage to the power supply, air discharge.
Transients as defined in IEC 801-2, Level 4

The storage capacitance shall be 150 pF and the discharge resistance shall be 330 Ωs. The tsupply
shall meet all discharge requirements for the CE Mark designation.

12

Agency Approvals and Product Regulatory Requirements
Components of OCP Project Olympus shall be designed to comply with regulatory requirements
mandated by countries where they are deployed.
•

•

•

•

34

Safety Compliance: Components shall be designed to comply with safety requirements
outlined in IEC 60950-1 and IEC 62368-1 (mandatory from 2019/6/20) standards, andapplicable national deviations (i.e. EN, CSA, UL, etc.).
EMC Compliance: Components shall be designed to comply with Class A emission limits andimmunity requirements outlined in CISPR 32 and CISPR 24 standards, and applicablenational regulations (i.e. FCC CFR 47, part 15 in the USA, ICES-003 in Canada, EN 55032 andEN 55024 in Europe, KN 32 and KN 35 in South Korea, etc.).
Environmental Compliance: Components shall be designed to comply with all worldwide
regulations that ban, restrict, or require reporting of hazardous substances (i.e. RoHS
Directive 2011/65/EU, REACH Directive 2006/1907/EC (Annex XVII) and Battery Directive
2006/66/EC in Europe, California Proposition 65 in the USA) applicable to server finishedgoods.
Energy Efficiency Compliance: Components shall be designed to comply with energy
efficiency regulations (i.e. Ecodesign regulation 617/2013/EU, annex II, clause 5.2, asapplicable to server power supply in Europe).

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Open Compute Project • Project Olympus Server Power Supply Specification

12.1 Safety Compliance
The following are the minimum product safety compliance regulations that must be met:•••

NRTL certificate to UL/CSA 60950-1 and UL/CSA 62368-1 (USA / Canada)
CB Certificate & Report, IEC/EN60950-1 and IEC/EN 62368-1 (CB report to include allcountry national deviations)GB4943.1- CNCA Certification (China)

Note: Certifications shall be done to the most recent standard editions
In addition to the above-mentioned standards, relevant safety certifications must be obtained
according to the Country List separately provided by Microsoft.
Each supplier to provide Microsoft with official test reports and certificates.
Note that the PSU’s will be downstream from a 50 Amp 3 phase breaker for Delta configurations
and a 32A breaker for Wye and single phase configurations.

12.2 Energy Compliance
The power supply and LES shall meet energy requirements set in European regulation 617/2013,
annex II, clause 5.2.
In addition to the above-mentioned standards, relevant safety certifications must be obtained
according to the Country List separately provided by Microsoft.
Each supplier to provide Microsoft with either an internal or third party test report.

12.3 Component Requirements
Following are the component regulation requirements:•

Battery and Cell shall have the minimum safety and transportation certifications, asapplicable from the table below:
Table 21: Component Requirements

Cell

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Standard/Cert

Required

IEC62133 (CB)UL 1642
UN 38.3
Korea (KC 62133)
Taiwan (BSMI)
China (GB 31241)
India (IS 16046)

Yes
Yes
Yes
(*)
Yes
(*)
(*)

Note 1: at the time this spec is released, cell certification for countries marked with (*) is
optional, however, several regulation and standards addressing directly batteries forstationary application are in progress and certification might be mandated.
Note 2: Battery pack/Cell assembly shall be evaluated and tested as part of the power
supply evaluation according to IEC 60950-1 and IEC 62368-1.
•
•
•
•
•
•
•

All Fans shall have the minimum certifications: UL and TUV or VDE.
All current limiting devices shall have UL and TUV or VDE certifications and shall be suitable
rated for the application where the device in its application complies with IEC60950.
All printed wiring boards shall be rated UL94V-0 and be sourced from a UL approved
printed wiring board manufacturer.
All connectors shall be UL recognized and have a UL flame rating of UL94V-0.
All wiring harnesses shall be sourced from a UL approved wiring harness manufacturer.
SELV Cable to be rated minimum 80V, 130C.
Product safety label must be printed on UL approved label stock and printer ribbon.
Alternatively, labels can be purchased from a UL approved label manufacturer.
The product must be marked with the correct regulatory markings to support thecertifications that are specified in this document.

12.4 EMC Requirements and Approvals
The product is required to comply with Class A emission requirements as the end system that it isconfigured into is intended for a commercial environment and market place. The power supply is tohave minimum of 6db margin to Class A.
•
•
•
•

•
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36

FCC /ICES-003 - Emissions (USA/Canada) Verification
CISPR 32 – Emissions (International) and CISPR 24 (Immunity)
EN55032 - Emissions (Europe)
EN55024 - Immunity (Europe)o EN61000-4-2 Electrostatic Dischargeo EN61000-4-3 Radiated RFI Immunityo EN61000-4-4 Electrical Fast Transientso EN61000-4-5 Electrical Surgeo EN61000-4-6 RF Conductedo EN61000-4-8 Power Frequency Magnetic Fields
o EN61000-4-11 Voltage Dips and Interruptions*EN61000-3-2 - Harmonics (Europe)*EN61000-3-3 - Voltage Flicker (Europe)
VCCI (Japan)
KN 32 and KN35 (South Korea)

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Open Compute Project • Project Olympus Server Power Supply Specification

The EMC standards and regulations mentioned above shall be considered during the course of thedesign of the component power supply. The latest issued standards and amendments should bereferred to in all cases.
While formal government, regulatory certification agency, or third party EMC test lab issued proof
of compliance (i.e. certificate, license, etc.) is not required for items such as component power
supplies that are not available off of the shelf, proof of compliance might be required for spareparts or components power supply shipped standalone; The component power supply shall not
contribute any noncompliant conditions to the end-use product. If at any time it is found that a
supplier’s component power supply causes the Microsoft end-use product to fail emissions and/or
immunity testing, the supplier will be instructed to investigate and resolve the problem.
Each supplier to provide Microsoft with an official test report containing passing test results for theapplicable emission and immunity standards.

12.5 Environmental Compliance
The finished product must comply with the latest editions of Microsoft specifications:••

H00594 MICROSOFT RESTRICTED SUBSTANCES FOR HARDWARE PRODUCTS, andH00642 MICROSOFT RESTRICTED SUBSTANCES CONTROL SYSTEM FOR HARDWARE
PRODUCTS.

This Finished product must not contain lead, mercury, cadmium, hexavalent chromium,polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE) in excess of the limits
specified in the EU Directive, 2011/65/EU, ”Restriction of the use of Certain Hazardous Substancesin Electrical and Electronic Equipment” and will not exceed a maximum unintentional or trace
allowance defined by the EU Directive 2011/65/EU).

12.6 Markings and Identification
The power supply module nameplate label(s) shall have the following markings at a minimum.
•
•
•
•
•
•
•
•
•
•
•

Supplier’s Company (Name and Address)
Regulatory Model Number (RMN)
supplier’s Generic Part Number:supplier’s Part Number:supplier’s Spares Part Number:
Supplier Revision level
Supplier Date Code of manufacture
Commodity Tracking Label, OEM Sub-Assemblies
Assembly Codes for this supply Country of Manufacture
Country of Origin
All Required AGENCY MARKINGS

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•
•
•
•
•
•

13

Multi-Lingual Hazardous Cautionary marking
Electrical Rating: Output rating, Input rating in Volts, Amps, Hertz.
Hipot marking
Electric shock warning (lightning bolt marking)
Crossed out screw driver marking
All required environmental markings

Quality Assurance and Reliability Provisions
Following are the provisions for quality assurance and reliability.

13.1 AC Inlet and Exterior Face

13.2 Chassis and Chassis Finish
Sheet metal chassis shall be Hot Dipped Galvanized Steel (HDGS).

13.3 Power Supply Fan/Location/Orientation
The fan can be located anywhere in the PSU. Airflow will be from the output connector side to the
AC input side.

13.4 Acoustic Requirement
Test condition is a power supply installed in the blade system chassis. Fan noise as measured fromone-meter distance from the Blade shall be less than 60 dBA typical, 65 dBA maximum. The test
setup shall be as follows: The blade is a desktop module with bystander locations only. The Blade is
to be placed on a table 28 to 36 inches high with the position of four- (4) bystander microphones.
The microphones will be one- (1) meter away, centered on each side, 1.5 meters high, as measured
from the floor, and placed at a 30° down angle. The A-weighted (100 -10 kHz) sound pressure must
be measured at the four- (4) bystander positions. Sound pressure is a measurement of the totalnoise at the specified microphone location in the room. Test shall be performed at 40°C inlet
temperature and 680W load.

13.5 Materials
All polymeric parts within the enclosure shall be molded from Underwriters Laboratories, Inc.
“Recognized” QMFZ2 polymeric material minimally rated 94 V-2.

38

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Open Compute Project • Project Olympus Server Power Supply Specification

13.6 Weight
The PSU with no battery shall not exceed 6 lbs 0 oz.
The PSU with a battery installed shall not exceed 7 lbs 6 oz.

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