YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

MOSFET REDUNDANCY MODULE
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For N+1 and 1+1 Redundant Systems
Dual Input with Single Output
Suitable for all Power Supplies
Only 72mV Voltage Drop at 20A Output Current
Only 2.15W Loss at 20A and 6.3W at 40A Output Current
160% (65A) Peak Load Capability
Reverse Input Polarity Protection
Full Power Between -40°C and +70°C
Width only 36mm
Rugged Metal Housing
Easy Wiring:
Distribution Terminal for Negative Pole Included
3 Year Warranty

PRODUCT DESCRIPTIONSHORT-FORM DATAThe YR40.241 is a redundancy module, which can be used
to build 1+1 and N+1 redundant system. It is equipped with
two input channels, which can be connected to power
supplies with up to 20A output current and one output,
which can carry nominal currents up to 40A. The module issuitable for power supplies with constant current overload
behavior as well as any kind of “Hiccup” overload behavior.
In addition to the YR40.241, the YR40.242 is also available
which is cost-optimized and suitable for all DIMENSION
power supplies except the QT20 and QTD20 series.

Input voltage
Input voltage range
Input current

The novelty of this redundancy module is the utilization ofmosfets instead of diodes for the decoupling of the two
input channels. This reduces the heat generation and thevoltage drop between input and output. The redundancy
module does not require an additional auxiliary voltage
and is self-sufficient even in case of a short circuit acrossthe output.
Due to the low power losses, the unit is very slender andonly requires 36mm width on the DIN rail. Largeconnection terminals allow for a safe and fast installation
with a large international approval package. This unit issuitable for nearly every application.

ORDER NUMBERS±30%

Dimensions

continuousfor 5 seconds
continuousfor 5 seconds
at cont. overload
or short circuit
typ. 72mV
input: 2x10A
typ. 112mV
input: 1x20A
typ. 140mV
input: 2x20A
typ. 700mW
at no load
typ. 2.15W
input: 2x10A
typ. 2.65W
input: 1x20A
typ. 6.3W
input: 2x20A-40°C to +70°C
operational,
no derating req.
36x124x127mm*) WxHxD

Weight

340g / 0.75lb

Output current

Input to output
voltage drop
Power losses

Temperature range*) plus, 4mm in depth for the screw terminal

MAIN APPROVALS

Redundancy
ModuleYR40.241

12-28V Standard unit

Accessory

ZM2.WALL

Wall/ panel mountbracketSide mount bracket

ZM11.SIDE

DC 12-28V
8.4-36.4Vdc
2x 0-20A
2x 20-32.5A
0-40A
40-65A
65A

For details and the complete approval list, see chapter 14.

UL 508

UL 60950-1

Class I Div 2

ATEX

IECEx

MarineJul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

INDEX
Page
1. Intended Use .......................................................3
2. Installation Instructions ......................................3
3. Input and Output Characteristics .......................5
4. Power Losses ........................................................6
5. Lifetime Expectancy and MTBF...........................7
6. Terminals and Wiring ..........................................8
7. Functional Diagram .............................................9
8. Front Side and User Elements .............................99. EMC ....................................................................10
10. Environment ......................................................11
11. Protection Features ...........................................12
12. Safety Features ..................................................12
13. Dielectric Strength ............................................12
14. Approved, Fulfilled or Tested Standards..........13Page
15. Regulatory Product Compliance ...................... 14
16. Physical Dimensions and Weight ..................... 15
17. Accessories ........................................................ 16
17.1. ZM2.WALL - Wall-Mounting Bracket....... 16
17.2. ZM11.SIDE - Side Mounting Bracket ........ 16
18. Application Notes ............................................. 17
18.1. Recommendations for Redundancy......... 1718.2. Inductive and Capacitive Loads................ 1718.3. Sideward Installation Clearances ............. 1718.4. 1+1 Redundancy up to 20A ...................... 18
18.5. N+1 Redundancy, Example with 60A ...... 18
18.6. Mounting Orientations ............................ 19

The information presented in this document is believed to be accurate and reliable and may change without notice.
No part of this document may be reproduced or utilized in any form without permission in writing from the publisher.

TERMINOLOGY AND ABREVIATIONSPE andsymbolPE is the abbreviation for Protective Earth and has the same meaning as the symbol.

Earth, Ground

This document uses the term “earth” which is the same as the U.S. term “ground”.

t.b.d.

To be defined, value or description will follow later.

DC 24VA figure displayed with the AC or DC before the value represents a nominal voltage withstandard tolerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)24Vdc

A figure with the unit (Vdc) at the end is a momentary figure without any additional
tolerances included.

may

A key word indicate flexibility of choice with no implied preferenceshall

A key word indicate a mandatory requirement

shouldA key word indicate flexibility of choice with a strongly preferred implementation

1+1 Redundancy

Use of two identical power supplies in parallel to provide continued operation following most
failures in a single power supply. The two power supply outputs should be isolated from eachother by utilizing diodes or other switching arrangements. E.g. two 10A power supplies areneeded to achieve a 10A redundant
N+1
1+1
system.

N+1 Redundancy

Use of three or more identical power
supplies in parallel to provide
continued operation following most
failures in a single power supply. All
power supply outputs should be
isolated from each other by utilizing
diodes or other switchingarrangements.
E.g.: To achieve a 40A redundant
system, five 10A power supplies areneeded in a N+1 redundant system.

Redundancy

AC

AC
DC

DC

DC

Redundancy

AC

AC

AC

AC

DC

DC

AC

AC
DC

DC

DC

IN 1 IN 2

IN 1 IN 2

OUT

OUT

OUT

OUT

-

Load

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany+

IN 1 IN 2+

IN 1 IN 2

-

Load

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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

1. INTENDED USEThis device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control,
process control, monitoring and measurement equipment or the like. Do not use this device in equipment where
malfunction may cause severe personal injury or threaten human life.
The redundancy module can be used with any type of power supply as long as the maximum output current ratings
are not exceeded. It is suitable for power supplies with continuous overload current as well as any kind of intermittent(Hiccup) overload behavior

2. INSTALLATION INSTRUCTIONSWARNING

Risk of electrical shock, fire, personal injury or death.

- Turn power off before working on the device and protect against inadvertent re-powering.
- Do not open, modify or repair the device.
- Use caution to prevent any foreign objects from entering into the housing.
- Do not use in wet locations or in areas where moisture or condensation can be expected.
- Do not touch during power-on, and immediately after power-off. Hot surface may cause burns.
Obey the following installation instructions:This device may only be installed and put into operation by qualified personnel.
This device does not contain serviceable parts. The tripping of an internal fuse is caused by an internal defect.
If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to
the factory for inspection.
Install the device in an enclosure providing protection against electrical, mechanical and fire hazards.
Do not ground or earth the positive output pole which could prevent redundancy in case of a ground failure. Groundthe negative output pole, when needed.
Use only power supplies with a negligible output ripple voltage in the low frequency range between 50Hz and 10kHz
when used in marine applications according to the GL regulations.
Install the device onto a DIN rail according to EN 60715 with the input terminals on the top of the device. Other
mounting orientations require a reduction in output current.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper cables that aredesigned for a minimum operating temperature of 60°C for ambient temperatures up to +45°C, 75°C for ambient
temperatures up to +60°C and 90°C for ambient temperatures up to +70°C. Ensure that all strands of a stranded wire
enter the terminal connection.
Unused screw terminals should be securely tightened.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed.
The enclosure of the device provides a degree of protection of IP20.
The input must be powered from a PELV or SELV source or an “Isolated Secondary Circuit” in order to maintain a SELVor PELV output.
Check correct input polarity. The device will not operate when input voltage is reversed.
The device is designed as “Class of Protection III” equipment according to IEC 61140.
A PE (ground) connection is not required. However, connecting the chassis ground terminal to ground can bebeneficial to gain a high EMI immunity.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do notcover ventilation grid!
The device is designed for altitudes up to 6000m (19685ft). See additional requirements in the product datasheet for
use above 2000m (6560ft).
Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side.
Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device is permanently loaded withless than 50%, the 5mm can be reduced to zero. Under special circumstances clearances can be reduced. See details in
the product datasheet.
The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the same as the ambientor surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity. I
Installation Instructions for Hazardous Location Areas
The device is suitable for use in Class I Division 2 Groups A, B, C, D locations and for use in Group II Category 3 (Zone 2)
environments.
Hazardous Location classification: ATEX: EPS 11 ATEX 1 312 X, II 3G EX ec IIC T4 Gc
WARNING EXPLOSION HAZARDS!
Substitution of components may impair suitability for this environment. Do not disconnect the device unless power has
been switched off or the area is known to be non-hazardous.
A suitable enclosure must be provided for the end product which has a minimum protection of IP54 and fulfils therequirements of the EN 60079-0.

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

3. INPUT AND OUTPUT CHARACTERISTICS
Number of inputs
Number of outputs
Input voltage

nom.

Input voltage range
Voltage drop, input to output

Input current

Peak input current
Output current

Reverse current
Reverse voltage
Output capacitance
Note:

2
1
DC 12-28V ±30%

The input circuitry must meet the SELV requirements
stipulated by IEC/EN/UL 60950-1.

8.4-36.4Vdc
140mV
72mV
112mV
2x 0-20A
2x 20-32.5A
2x 32.5A
1000A
40A
40-65A
65A

typ.
typ.
typ.
nom.
nom.
max
max.
nom.
nom.
max.
max.
max.
typ.

at 2x20A, see Fig. 3-1
at 2x10A, see Fig. 3-1
at 1x20A, see Fig. 3-2
continuousfor 5 seconds
at continuous overload or short circuitfor max. 1ms per input
continuousfor 5 seconds
at continuous overload or short circuit

1mA
40Vdc
320µF

at 24V, per input, -40°C to +70°C
voltage applied to the output, continuously allowed

Ensure that the continuous output current does not exceed 65A. Check the short-circuit current of the power sources and if thepower source can deliver more than 65A together, use an appropriate fuse on the output.
Fig. 3-1 Input to output voltage drop when both inputs draw current(typical 1+1 redundant case, when the output voltages of the two units are equal)

160mV
140mV
120mV
100mV
80mV
60mV
40mV
20mV
0mV

Voltage Drop, typ

QS/QT20I1
A

24V,20A

B

A... 25°C
B... 60°C

+

A

-

V U1

QS/QT20+

Output: 0
Input: 0

-

20A
40A
30A
10A
2x5A 2x10A 2x15A 2x20A

I1 = I2

IOUT
AInput 1

OutputVariable
Load,
0-40A

UOUT V

I2
A

24V,20A

Input / Output Current

OutputYR40

V U2

Input 2U1 = U2

Voltage Drop = U1 - UOUT

Fig. 3-2 Input to output voltage drop when only one input draws current

160mV
140mV
120mV
100mV
80mV
60mV
40mV
20mV
0mV

Voltage Drop, typ.

QS/QT20I1
A

24V,20A+

A... 25°C
B... 60°C

B

A

Output Current

0

5A

10A

15A

-

V U1

Not used or
power supply
with lower
voltage

Output

YR40

IOUT
A

Input 1

OutputVariable
Load,
0-20A

UOUT V

Input 2

Voltage Drop = U1 - UOUT

20A

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

4. POWER LOSSESPower losses

typ.
typ.
typ.

DC 24V
2.15W
6.3W
2.6W

Standby power losses

typ.

0.35W

typ.

0.7W

input: 2x10A
input: 2x20A
input: 1x20A,(only one input is connected to input voltage)at no output current,(only one input is connected to input voltage)at no output current,(both inputs are connected to input voltages)

Fig. 4-1 Power losses when both inputs draw equal current

Power Losses, typ.

7W
6.0
5.0
4.0
3.0
2.0
1.0
0

QS/QT20
24V,20A
+
e.g.
24.5V

A... 25°C
B... 60°C

B A-

QS/QT20
24V,20A
+
e.g.
24.5V

Output Current

0

5

10

15

20

25

30

35 40A-I1 = I2

I1
AV U1

Output

YR40

IOUT
A

Input 1

OutputVariable
Load,
0-40A

UOUT VI2
A
V U2

Input 2Losses = ( U1 * I1 + U2 * I2 ) - UOUT * IOUT

U1 = U2

Fig. 4-2 Power losses when only one input is used
Power Losses, typ.

4W
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0

QS/QT20
24V,20A+

A... 25°C
B... 60°C

-

B

I1
A
V U1

Output

YR40

IOUT
A
OutputInput 1

Variable
Load,
0-20A

UOUT VA

Input 2

Output Current

0

2.5

5

7.5 10 12.5 15 17.5 20A

Losses = U1 * I1 - UOUT * IOUT

Note: As soon as voltage is applied on input 2, an additional 0.35W will be consumed. It is not relevant, whether this channel contributes
to the output current or not.

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

5. LIFETIME EXPECTANCY AND MTBF
The redundancy module has two input channels which are completely independent from each other. Each control
circuit, auxiliary voltage source, or other circuitry in the module are designed separately for each input. The dual input
redundancy module can be considered as two single redundancy modules combined together in one housing. The only
common point is the circuit trace that ties the two separate circuits together at the output.
The MTBF figures below are for the entire dual input module. If the MTBF number of only one path is needed, simply
double the value from the table.
Input / output current
conditions
Lifetime expectancy*)
MTBF**) SN 29500, IEC 61709
MTBF**) MIL HDBK 217F

Input: 2x10A
Output: 20A
649 000h *)1 835 000h *)3 386 000h
5 667 000h
116 000h
155 000h
612 000h
813 000h

Input: 2x20A
Output: 40A
246 000h *)696 000h *)2 706 000h
4 686 000h
97 000h
128 000h
522 000h
687 000h

at 24V and 40°C
at 24V and 25°C
at 24V 40°C
at 24V 25°C
Ground Fixed GF40 (24V and 40°C)
Ground Fixed GF25 (24V and 25°C)
Ground Benign GB40 (24V and 40°C)
Ground Benign GB25 (24V and 25°C)

The Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime
expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours and is calculated according to thecapacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years(131 400h). Any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices.
**) MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicates reliability of adevice. It is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h means thatstatistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it can not be determined if the failed unit
has been running for 50 000h or only for 100h.
*)Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

6. TERMINALS AND WIRINGType

Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter
Wire stripping length
Screwdriver
Recommended tightening torque

Input
Screw termination
IP20 Finger safe construction.
Suitable for field installation.
0.5-6mm2
0.5-4mm220-10 AWG
2.8mm (including ferrule)
7mm / 0.275inch
3.5mm slotted or Pozidrive No 2
0.8Nm, 7lb.in

OutputScrew termination
IP20 Finger safe construction.
Suitable for field installation.
0.5-16mm2
0.5-10mm222-8 AWG
5.2mm (including ferrule)
12mm / 0.5inch
3.5mm slotted or Pozidrive No 2
1.2Nm, 10.6lb.in

To connect the chassis to ground, use a ring-type terminal (ring cable lug) which is suitable for a M4 screw and connect
it to the chassis ground terminal on top of the unit.
Instructions:a) The external circuitry of all terminals must meet the safety requirements stipulated by IEC/EN/UL 60950-1: SELV.
b) Use appropriate copper cables that are designed for minimum operating temperatures of:
60°C for ambient up to 45°C and
75°C for ambient up to 60°C and
90°C for ambient up to 70°C minimum.
c) Follow national installation codes and installation regulations!
d) Ensure that all strands of a stranded wire enter the terminal connection!
e) Screws of unused terminal compartments should be securely tightened.
f) Ferrules are allowed.
g) Do not connect or disconnect the wires from the terminals below -25°C (-13°F).

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

7. FUNCTIONAL DIAGRAM
Fig. 7-1 Functional diagram
control

+

+

-

-

Input 1

OutputChassisGround+Input 2-

control

8. FRONT SIDE AND USER ELEMENTS
Fig. 8-1 Front sideA

Output Terminals (screw terminals)

B

Chassis Ground Terminals
To be connected on the top side of the housing with a ring-type terminal(ring cable lug) which is suitable for a M4 screw.
Connection of the chassis is optional and not required since the unit fulfils
the requirements according to protection class III.

C

Input Terminals for Input 1 (screw terminals)

D Input Terminals for Input 2 (screw terminals)

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

9. EMCThe redundancy module is suitable for applications in industrial environment as well as in residential, commercial andlight industry environment without any restrictions. A detailed EMC report is available on request.
EMC Immunity
Electrostatic discharge
Electromagnetic RF field
Fast transients (Burst)
Surge voltage on input
lines

According generic standards: EN 61000-6-1 and EN 61000-6-2
Contact discharge
8kV
EN 61000-4-2
Air discharge
15kV
EN 61000-4-3
80MHz-2.7GHz
20V/m
Input lines
2kV
EN 61000-4-4
Output lines
2kV
500V
EN 61000-4-5+1kV+/-  Chassis ground

Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A

500V
1kV

Criterion A
Criterion A

20V
30A/m

Criterion A
Criterion A

Surge voltage on output
lines

EN 61000-4-5

Conducted disturbancePower-frequency magnetic
field *)EN 61000-4-6
EN 61000-4-8++/-  Chassis ground0.15-80MHz
50Hz

Criterions:
A: Redundancy module shows normal operation behavior within the defined limits.
Notes:*) A test is not applicable according to EN 61000-6-2, since the device does not contain components susceptible to magnetic fields, e.g. hallelements, electrodynamic microphones, etc.

According generic standards: EN 61000-6-3 and EN 61000-6-4
limits for DC power ports according
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1
EN 61000-6-3 fulfilled *)Radiated emission
EN 55011, EN 55032
Class B
This device complies with FCC Part 15 rules.
Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) thisdevice must accept any interference received, including interference that may cause undesired operation.
EMC Emission
Conducted emission*)

For information only, not mandatory for EN 61000-6-3. Provided, that power sources connected on the inputs fulfill the requirements too.

Switching frequency

The internal auxiliary supply is generated with a boost converter.
The switching frequency is typ. 16kHz.

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

10. ENVIRONMENT
Operational temperature *)Storage temperature
Humidity **)Vibration sinusoidal ***)
Shock ***)
Altitude-40°C to +70°C (-40°F to 158°F)-40 to +85°C (-40°F to 185°F)
5 to 95% r.H.
2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g
2 hours / axis
30g 6ms, 20g 11ms
3 bumps / direction, 18 bumps in total
0 to 2000m (0 to 6 560ft)
2000 to 6000m (6 560 to 20 000ft)

Altitude derating
Over-voltage category

2.5A/1000m or 5°C/1000m
not applicable

Degree of pollution

2

for storage and transportation
IEC 60068-2-30
IEC 60068-2-6
IEC 60068-2-27
without any restrictions
reduce output power or ambient temperature,
see Fig. 10-2
> 2000m (6500ft), see Fig. 10-2
The concept of the overvoltage category isused for equipment energized directly fromthe low voltage mains (IEC 60664-1 §4.3.3.2.1).
IEC 62103, EN 50178, not conductive*) Operational temperature is the same as the ambient temperature and is defined as the air temperature 2cm below the unit.
**) Do not energize while condensation is present***) Tested in combination with DIN rails according to EN 60715 with a height of 15mm and a thickness of 1.3mm and standard mounting
orientation.
Fig. 10-1 Output current vs. ambient temp.

Allowed Output Current

65A

65A

at overload / short circuit

50
40

Fig. 10-2 Output current vs. altitude
Allowed Output Current

50

normal mode

30

20

20

10

10

Ambient Temperature

020

normal mode

40

30

0
-40 -25

overload / short circuit

40

A
A... Tamb < 70°C
B... Tamb < 60°C
C... Tamb < 50°C

060 70°C

0

2000

B

C

Altitude

4000

6000m

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
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YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

11. PROTECTION FEATURES
Output over-current protection
Reverse input polarity
protection
Degree of protection
Penetration protection
Over-temperature protection
Input transient protection
Output transient protection
Internal input fuse

not included
includedunit does not start when input voltage is reversed

IP 20> 3.6mmnot included
not included
included
not included

EN/IEC 60529
e.g. screws, small parts

no galvanic separation
III< 0.1Ohm

Mosfet between input and output
PE (Protective Earth) or chassis connection not required
between housing and chassis-ground terminal

see EMC chapter

12. SAFETY FEATURES
Input / output separation
Class of protection
PE resistance

13. DIELECTRIC STRENGTH
The input and output voltages have the same reference, are floating and have no ohmic connection to ground.
Type and factory tests are conducted by the manufacturer. Field tests may be conducted in the field using theappropriate test equipment which applies the voltage with a slow ramp (2s up and 2s down). Connect input/output
terminals together before conducting the test.
When testing, set the cut-off current settings to the value in the table below.

Type test

60s

A
500VacFactory test

5s

500VacField test

5s

500VacFig. 13-1 Dielectric strength

In- / Output+-

A

ChassisCut-off current setting> 2mA

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

12/19

YR40.241
Y-Series

12-28V, 40A, DUAL REDUNDANCY MODULE

14. APPROVED, FULFILLED OR TESTED STANDARDSUL 508

IEC 60950-1

UL 60950-1

ATEX

IECEx

Class I Div 2UL Certificate
Listed equipment for category NMTR - Industrial Control Equipment
Applicable for US and Canada
E-File: E198865
CB Scheme Certificate
General safety requirements for Information Technology Equipment(ITE)
UL Certificate
Recognized component for category QQGQ - Information
Technology Equipment (ITE)
Applicable for US and Canada
E-File: E137006
Agency Certificate (Bureau Veritas)
EN 60079-0 Explosive atmospheres - General requirements
EN 60079-7 Equipment protection by type of protection "e"Certificate: EPS 11 ATEX 1 312 X
Temperature Code: T4
Type of Protection: ec
IECEx Certificate
IEC 60079-0 Explosive atmospheres - General requirements
IEC 60079-7 Equipment protection by type of protection "e"Certificate: IECEx EPS 12.0032 X
Temperature Code: T4
Type of Protection: ec
CSA Certificate
Power Supplies for Hazardous Location
Applicable for Canada and US
CSA Class: 5318-01 (Canada), 5318-81 (USA)
Temperature Code: T4
Groups: A, B, C and D

Marine (DNV)

DNV Certificate
DNV Type approved product
Certificate: TAA00002YX
Temperature: Class D
Humidity: Class B
Vibration: Class C
EMC: Class B
Enclosure: Class A

Marine (ABS)ABS Design Assessment Certificate
ABS (American Bureau of Shipment) assessed product
Certificate: 17-HG1599236-PD
Manufacturer's Declaration (Online Document)
Environmental Tests, Flowing Mixed Gas Corrosion Test
Test Ke - Method 4
H2S: 10ppb
NO2: 200ppb
Cl2: 10ppb
SO2: 200ppb
Test Duration: 3 weeks, which simulates a service life of 10 years.

IEC 60068-2-60

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

13/19

YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

ISA-71.04-1985

VDMA 24364

Manufacturer's Declaration (Online Document)
Airborne Contaminants Corrosion Test
Severity Level: G3 Harsh
H2S: 100ppb
NOx: 1250ppb
Cl2: 20ppb
SO2: 300ppb
Test Duration: 3 weeks, which simulates a service life of 10 years
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364-C1-L/W
for solvents and water-based paints

15. REGULATORY PRODUCT COMPLIANCE
EU Declaration ofConformity

REACH Directive

WEEE Directive

KC Korean Certificate

EAC TR Registration

The CE mark indicates conformance with the- EMC directive- ATEX directive- RoHS directive
Manufacturer's Statement
EU-Directive regarding the Registration, Evaluation,
Authorization and Restriction of Chemicals
Manufacturer's Statement
EU-Regulation on Waste Electrical and Electronic Equipment
Registered in Germany as business to business (B2B) products.
KC Registration
Korean registration of Broadcasting and Communication
Equipment
Registered under Clause 3, Article 58-2 of Radio Waves Act.
EAC Certificate
EAC EurAsian Conformity - Registration Russia, Kazakhstan
and Belarus
8504408200, 8504409000

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

14/19

YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

16. PHYSICAL DIMENSIONS AND WEIGHT
WeightDIN rail

Installation clearances

340g / 0.75lb
Use 35mm DIN rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
The DIN rail depth must be added to the unit depth (127mm) to calculate the total required
installation depth.
See chapter 2

Fig. 16-1 Front viewFig. 16-2 Side view

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

15/19

YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

17. ACCESSORIES
17.1. ZM2.WALL - WALL-MOUNTING BRACKETThis standard bracket is used to mount the YR40.241 redundancy module onto a flat surface without utilizing a DIN
rail.
Fig. 17-1 ZM2.WALL Wall mounting bracket

Fig. 17-2 Assembled wall mounting bracket

17.2. ZM11.SIDE - SIDE MOUNTING BRACKETThis bracket is used to mount the YR40.241 redundancy module sideways with or without utilizing a DIN rail.
The two aluminum brackets and the black plastic slider of the unit have to be detached, so that the steel brackets canbe mounted.
For sideway DIN rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on
the steel bracket.
Fig. 17-3
ZM11.SIDE Side mounting bracket

Fig. 17-4
Side mounting with DIN rail brackets

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

16/19

YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

18. APPLICATION NOTES
18.1. RECOMMENDATIONS FOR REDUNDANCY
Recommendations for the configuration of redundant power systems:-

Use separate input fuses for each power supply.

-

Use three-phase power supplies to gain functional safety if one phase fails.

-

When single-phase power supplies are utilized connect them to different phases or mains circuits if possible.

-

Set the power supply in “Parallel-Use” mode if this feature is available-

It is desirable to set the output voltages of all power supplies to the same value.

18.2. INDUCTIVE AND CAPACITIVE LOADSThe unit is designed to supply any kind of loads, including unlimited capacitive and inductive loads.

18.3. SIDEWARD INSTALLATION CLEARANCES
The minimum clearance recommendations are defined in chapter 2.
Normally, the following installation clearance are recommended: 40mm on top, 20mm on the bottom, 5mm on theleft and right sides when the device is loaded permanently with more than 50% of the rated power. Increase thisclearance to 15mm in case the adjacent device is a heat source (e.g. another power supply).
The clearance between the power supplies and the redundancy module can be reduced to zero under the following
conditions:-

1+1 redundancy application with maximum 20A output current.

-

The power supplies are from the PULS DIMENSION series.

-

The redundancy module is placed between the two power supplies.

-

The output voltage is set to the same level on both power supplies.

+ - + -++ - -

DC24V,20A OK

Input Input
2
1

YR40.241

Power
SupplyRedundancy
ModuleL1 L2 L3 PE

Output+-++ - -

DC24V,20A OK

Power
SupplyL1 L2 L3 PE

20A
Load
0mm

0mm

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

17/19

YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series

18.4. 1+1 REDUNDANCY UP TO 20A
1+1 Redundancy up to 20A requires two 20A power supplies and one YR40.241 redundancy module.
Fig. 18-1 Wiring diagram, 1+1 Redundancy, 20A output current

FailureMonitor+ - + -++ - -++ - -

Input Input
2
1

DC24V,20A OK

DC24V,20A OK

YR40.241
Redundancy
ModulePower
SupplyPower
SupplyOutput+L1 L2 L3 PE-

L1 L2 L3 PE

20A
Load

I

I

I

I

I

I

L1
L2
L3
PE

Note: Use separate mains systems for each power supply whenever it is possible

18.5. N+1 REDUNDANCY, EXAMPLE WITH 60A
N+1 Redundancy up to 60A requires four 20A power supplies and two YR40.241 redundancy modules.
Fig. 18-2 Wiring diagram, n+1 Redundancy, 60A output current

FailureMonitor++ - -

DC24V,20A OK+ - + -

Input Input
2
1

YR40.241
Redundancy
ModulePower
SupplyL1 L2 L3 PE

Output+-++ - -

DC24V,20A OK++ - -

DC24V,20A OK+ - + -++ - -

Input Input
2
1

DC24V,20A OK

YR40.241
Redundancy
ModulePower
SupplyPower
SupplyL1 L2 L3 PE

L1 L2 L3 PE

Output+-Power
SupplyL1 L2 L3 PE

60A
Load

I

I

I

I

I

I

I

I

I

I

I

I

L1
L2
L3
PE

Note: Use separate mains systems for each power supply whenever it is possible

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

18/19

YR40.241
12-28V, 40A, DUAL REDUNDANCY MODULE

Y-Series18.6. MOUNTING ORIENTATIONSMounting orientations other than input terminals on the bottom and output on the top require a reduction incontinuous output power or a limitation in the maximum allowed ambient temperature. The amount of reduction
influences the lifetime expectancy of the power supply. Therefore, two different derating curves for continuous
operation can be found below:
Curve A1
Curve A2

Recommended output current.
Max allowed output current (results in approximately half the lifetime expectancy of A1).

Fig. 18-3
Mounting
Orientation A(Standardorientation)

Output Current

40A

INPUT

30

YR40
Redundancy
Module20
10

Ambient Temperature

0

OUTPUT

20
Fig. 18-4
Mounting
Orientation B(Upside down)

A1

30

40

60

50

70°C

Output Current

40A

A1

OUTPUT

30
Redundancy
Module

20

YR40

10

Ambient Temperature

0

INPUT

20
Fig. 18-5
Mounting
Orientation C(Table-top
mounting)

30

40

50

60

70°C

Output Current

40A
30

A2

20

A1

10
Ambient Temperature

0
20

50

60

70°C

40A
INPUT

YR40

Redundancy
Module

30

A2

20

A1

10
Ambient Temperature

0
20

30

40

50

60

70°C

Output Current

OUTPUT

YR40

Redundancy
Module40A
INPUT

Fig. 18-7
Mounting
Orientation E(Horizontal ccw)

40

Output Current

OUTPUT

Fig. 18-6
Mounting
Orientation D(Horizontal cw)

30

30

A2

20

A1

10
Ambient Temperature

0
20

30

40

50

60

70°C

Jul. 2021 / Rev. 1.5 DS-YR40.241-EN
All parameters are specified at 24V, 40A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone +49 89 9278 0Germany

19/19