QT40.241-B2
24V, 40A, THREE PHASE INPUT

Q-Series

POWER SUPPLY
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3AC 380-480V Wide-range Input
Three Input Fuses Included
Version with IO-Link Interface V1.1
Width only 110mm, Weight only 1.5kg
95.3% Full Load and Excellent Partial Load Efficiencies
50% BonusPower, 1440W for up to 5s
110A Peak Current for 10ms for Easy Fuse Tripping
Active PFC (Power Factor Correction)
Active Filtering of Input Transients
Negligible Low Input Inrush Current Surge
Full Power Between -25°C and +55°C
Current Sharing Feature for Parallel Use
Remote Control of Output Voltage
Remote Control of Shut-down
3 Year Warranty

PRODUCT DESCRIPTIONSHORT-FORM DATA

The most outstanding features of the DIMENSION Q- Series DIN
rail power supplies are the extremely high efficiencies and thesmall sizes, which are achieved by a synchronous rectificationand other technological designs.

Output voltage
Adjustment range
Output current

Large power reserves of 150% support the starting of heavyloads such as DC-motors or capacitive loads. In many cases thisallows the use of a unit from a lower wattage class which saves
space and money.

Output power

High immunity to transients and power surges as well as low
electromagnetic emission makes usage in nearly every
environment possible.
The integrated output power manager, the three input fuses
and near zero input inrush current make installation and usage
simple. Diagnostics are easy due to a green DC-OK LED and thered overload LED. In addition to these indicators, advanced
diagnostics can be accessed via IO-Link interface.
A large international approval package for a variety of
applications makes this unit suitable for nearly every
application.

ORDER NUMBERS
Power Supply

QT40.241
QT40.241-B2
QT40.242

Accessory

ZM2.WALL
UF20.241
YR80.241

Output ripple
Input voltage
Mains frequency
AC Input current
Power factor
AC Inrush current
Efficiency
LossesTemperature range
Derating
Hold-up time
Dimensions (WxHxD)
WeightDC 24Vnominal15 – 28.5Vdc
default 24.1V
40 – 33.7A
continuous
60 – 50.5A
short term (5s)960W
continuous
1440W
short term (5s)
< 100mVpp
20Hz to 20MHz
3AC 380-480V-15%/+20%
50-60Hz±6%
1.65 / 1.35A
at 3x400 / 480Vac
0.88 / 0.90
at 3x400 / 480Vac
typ. 4.5A peak
95.3 / 95.2%
at 3x400 / 480Vac
47.3 / 48.4W
at 3x400 / 480Vac-25°C to +70°C
operational
20W/°C+55 to +70°C
typ. 25 / 25ms
at 3x400 / 480Vac
110x124x143,5mm Without Din rail
1500g

MAIN APPROVALS
24-28V Standard unit
24-28V Standard unit with
IO-Link and 5s BonusPower
24-28V Standard unit
Extralong lifetime
Wall mount bracket
Buffer unit
Redundancy module

For details and the complete approval list, see chapter 21

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

INDEX
Page
1. Intended Use ................................................................ 3
2. Installation Requirements ............................................ 3
3. AC-Input ....................................................................... 4
4. Input Inrush Current ..................................................... 5
5. DC-Input ....................................................................... 5
6. Output .......................................................................... 6
7. Hold-up Time ................................................................ 8
8. IO-Link Interface ........................................................... 8
9. Remote Control of Shut-down ................................... 11
10. Remote Control of Output Voltage ............................ 12
11. Efficiency and Power Losses ....................................... 13
12. Lifetime Expectancy and MTBF .................................. 14
13. Functional Diagram .................................................... 15
14. Terminals and Wiring ................................................. 16
15. Front Side and User Elements .................................... 17
16. EMC ............................................................................ 18
17. Environment ............................................................... 19
18. Protection Features .................................................... 20
19. Safety Features........................................................... 20
20. Dielectric Strength ...................................................... 21
21. Approved, Fulfilled or Tested Standards .................... 22Page
22. Regulatory product Compliance ................................ 22
23. Physical Dimensions and Weight ............................... 23
24. Accessories................................................................. 24
24.1. ZM2.WALL - Wall mounting bracket ................ 24
24.2. UF20.241 - Buffer module ................................ 24
24.3. YR80.241 - Redundancy Module ...................... 25
25. Application Notes....................................................... 26
25.1. Repetitive Pulse Loading .................................. 26
25.2. Peak Current Capability .................................... 27
25.3. External Input Protection ................................. 27
25.4. Using only 2 Legs of a 3-Phase System ............. 28
25.5. Charging of Batteries ........................................ 29
25.6. Output Circuit Breakers .................................... 29
25.7. Parallel Use to Increase Output Power ............ 30
25.8. Parallel Use for Redundancy ............................ 30
25.9. Series Operation............................................... 31
25.10. Inductive and Capacitive Loads ........................ 31
25.11. Back-feeding Loads .......................................... 31
25.12. Use in a Tightly Sealed Enclosure ..................... 31
25.13. Mounting Orientations ..................................... 32

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.

AC 400V

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

400VacA figure with the unit (Vac) at the end is a momentary figure without any additional tolerances included.

50Hz vs. 60Hz

As long as not otherwise stated, AC 230V parameters are valid at 50Hz mains frequency.

may

A key word indicating flexibility of choice with no implied preference.

shall

A key word indicating a mandatory requirement.

shouldA key word indicating flexibility of choice with a strongly preferred implementation.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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24V, 40A, THREE PHASE INPUT

Q-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.
If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.
Do not connect the IO Link port to any other equipment except industrial control equipment.

2. INSTALLATION REQUIREMENTSWARNING

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 device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN rail according to EN 60715 with the input terminals on the bottom 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 are designed 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. Use ferrules for wires on the input terminals. 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 device is designed for overvoltage category II zones. Below 2000m altitude the device is tested for impulse withstand voltages up to 4kV,
which corresponds to OVC III according to IEC 60664-1.
The device is designed as “Class of Protection I” equipment according to IEC 61140. Do not use without a proper PE (Protective Earth)connection.
The device is suitable to be supplied from TN, TT or IT mains networks. The continuous voltage between the input terminals and the PE potential
must not exceed 576Vac. The device is not designed to be used on corner grounded delta systems.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not cover ventilation grid!
The device is designed for altitudes up to 5000m. Above 2000m a reduction in output current and over voltage category is required.
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 with less than 50%, the 5mm can be reduced to zero.
The device is designed, tested and approved for branch circuits up to 32A (IEC) and 30A (UL) without additional protection device. If an externalfuse is utilized, do not use circuit breakers smaller than 6A B- or C-Characteristic to avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C. The operational temperature is the same as the ambient or surrounding air temperatureand is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.
The supply voltage for the IO-Link must be powered from a PELV or SELV source or an "Isolated Secondary Circuit" in order to maintain a SELV or
PELV output.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

3. AC-INPUT
AC inputnom.

3AC 380-480V

AC input range
Allowed voltage L to earth
Input frequency
Turn-on voltage
Shut-down voltage

max.
nom.
typ.
typ.

3x 323-576Vac
576Vac50–60Hz3x 305Vac
3x 275Vac

Input current

typ.

3AC 400V
1.65A

3AC 480V
1.35A

Power factor*)
Start-up delay
Rise time

typ.
typ.
typ.
typ.
max.

0.88
500ms
35ms
40ms
500mV

0.90
600ms
35ms
40ms
500mV

Turn-on overshootacc. IEC 60664-1±6%
steady-state value, load independent, see Fig. 3-1
steady-state value, load independent, see Fig. 3-1

at 24V, 40A, symmetrical phase voltages, see Fig.
3-3
at 24V, 40A, see Fig. 3-4
see Fig. 3-2
at 24V, 40A, resistive load, 0mF see Fig. 3-2
at 24V, 40A, resistive load, 40mF see Fig. 3-2
see Fig. 3-2

The power factor is the ratio of the true (or real) power to the apparent power in an AC circuit.

Fig. 3-1 Input voltage range

Input
Voltage

Rated input range

L1 L2 L3

Turn-onShut -dow n

POUT

Fig. 3-2 Turn-on behaviour, definitions

OutputVoltage

VIN
275V 305V

323V

Start-up
delay

Fig. 3-3 Input current vs. output load at 24V

Fig. 3-4 Power factor vs. output load at 24V

0.95
A: 3x 400Vac
B: 3x 480Vac

Rise
Time

576VacInput Current, typ.

1.6A
1.4
1.2
1.0
0.8
0.6
0.4
0.2

- 5%

Overshoot*)suitable for TN, TT and IT mains networks,
grounding of one phase is allowed except in UL 508 applications

Power Factor, typ.
A: 3x 400Vac
B: 3x 480Vac

0.90

A

B
A

0.85

B

0.80
0.75
Output Current

04

8 12 16 20 24 28 32 36 40A

Output Current

0.70
4

8 12 16 20 24 28 32 36 40A

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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24V, 40A, THREE PHASE INPUT

Q-Series

4. INPUT INRUSH CURRENT
The power supply is equipped with an active inrush current limitation circuit, which limits the input inrush current after turn-on to anegligible low value. The input current is usually smaller than the steady state input current.

Inrush current*)

max.
typ.
max.
typ.

Inrush energy
Inrush delay*)

3AC 400V
6Apeak
4.5Apeak
1.5A2s500ms

3AC 480V
6Apeak
4.5Apeak
1.5A2s
600ms

over entire temperature range
over entire temperature range
over entire temperature range

The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.

Fig. 4-1 Typical turn-on behaviour at nominal load and
25°C ambient temperature

Input Current 2A/DIV

Input
3x400Vac

Output100ms/DIV

24Vdc

5. DC-INPUT
Do not operate this power supply with DC-input voltage.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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24V, 40A, THREE PHASE INPUT

Q-Series

6. OUTPUT
Output voltage

nom.

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

24.1V
10mV
50mV
100mVpp
40A
33.7A
60A

nom.

50.5A

typ.

110A

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

960W
1440W*)
5s
10s
cont. current
40A
44A
60A
68A
46A
51A

Vout adjustable via IO-Link only.
Maximum value of Vout limited to pre-configured setting(Potentiometer), see chapter 10±0.2%, at full load, cold unit
3x 323-576Vac
static value, 0A→40A, see Fig. 6-1
20Hz to 20MHz, 50Ohm
continuously available at 24V, see Fig. 6-1
continuously available at 28.5V, see Fig. 6-1 Fig. 6-2
short term (5s) available BonusPower*), at 24V,
see Fig. 6-1 and Fig. 6-3
short term (5s) available BonusPower*), at 28.5V,
see Fig. 6-1 and Fig. 6-3
up to 10ms, output voltage stays above 20V, see Fig. 6-3, This
peak current is available once every second.
See chapter 25.2 for more peak current measurements.
continuously available at 24-28V
short term available BonusPower*) at 24-28.5V
duration until the output voltage dips, see Fig. 6-2
overload free time to reset power manager, see Fig. 6-4
see Fig. 6-1
continuous, load impedance 25mOhm, see Fig. 6-1
continuous, load impedance 25mOhm, see Fig. 6-1
short-term (5s), load impedance 25mOhm, see Fig. 6-1
short-term (5s), load impedance 25mOhm, see Fig. 6-1
continuous, load impedance <10mOhm
continuous, load impedance <10mOhm

typ.

10 200µF

included in the power supply

Adjustment range
Factory settingLine regulation
Load regulation
Ripple and noise voltage
Output current

Output power
BonusPower time
BonusPower recovery time
Overload behaviour
Short-circuit current**)

Output capacitance
*)

**)

24V
15-28.5V

BonusPower, short term power capability (up to typ. 5s)
The power supply is designed to support loads with a higher short-term power requirement without damage or shutdown. The short-term duration is
hardware controlled by an output power manager. This BonusPower is repeatedly available. Detailed information can be found in chapter 25.1. If thepower supply is loaded with the BonusPower longer than shown in the bonus-time diagram (see Fig. 6-2), the max. output power is automatically reduced
to 960W.
Discharge current of output capacitors is not included.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

Fig. 6-1 Output voltage vs. output current, typ.

Output Voltage

28.5V

Fig. 6-2 Bonus time vs. output power

Adjustment Range
Limiter Range
15-28.5V DC
24-28.5V DC
via IO-LinkA

24

Bonus Time

6s

B

max.

5

20
16

A

A Continuously

12
8

B

3

available
Short-term (5s)
BonusPower

2

4
0
0

10

20

min.

4

B

30

40

50

60

70A

Output Power

1
110

120

130

140

150

160%

Output Current

Fig. 6-3 Dynamic overcurrent capability, typ.

Fig. 6-4 BonusPower recovery time

Output Voltage (dynamic behavior, < 10ms)

28.5V

Limitation by
Power Manager

Power
Demand24
20

Limiter Range
24-28.5V DC

16

100%
t

12
8
4
0

Recovery Time
Bonus Power disabled

Bonus
Time

OutputVoltage

t

0

40

80

120

160

200A

Output Current

The BonusPower is available as soon as power comes on and after the end of an output short circuit or output overload.
Fig. 6-5 BonusPower after input turn-on

Fig. 6-6 BonusPower after output short

Short ofOutput

Input
Voltage

OutputVoltage
OutputVoltage150%
Output
Power

100%

Bonus
Power

Output
Power

150%

Bonus
Power

100%

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

7. HOLD-UP TIME
Hold-up Time*)3AC 400V*)
50ms
40ms
25ms
20ms

typ.
min.
typ.
min.

3AC 480V*)
50ms
40ms
25ms
20ms

at 24V, 20A, see Fig. 7-1
at 24V, 20A, see Fig. 7-1
at 24V, 40A, see Fig. 7-1
at 24V, 40A, see Fig. 7-1

Curves and figures for operation on only 2 legs of a 3-phase system can be found in chapter 25.4.

Fig. 7-1 Hold-up time vs. input voltage

Hold-up Time

Fig. 7-2 Shut-down behaviour, definitions

24V, 20A, typ.

50ms

L1 L2 L3

Input
Voltage

24V, 20A, min.

40
30

24V, 40A, typ.

20

24V, 40A, min.

10
0
320

Hold-up Time

Input Voltage

360

400

440

- 5%

OutputVoltage

3x480Vac

8. IO-LINK INTERFACE
This power supply is equipped with an IO-Link interface compliant to IO-Link protocol V1.1 (M12 male, A-coded) on the device front side
and can be connected to any IO-Link masters compliant to V1.1 of IO-Link protocol. The Pin Assignment is shown in Fig. 8-1.
It is possible to operate the power supply without IO-Link communication. Due to a built-in EEPROM, the power supply can also be
operated with values which have previously been updated via IO-Link also in case of no IO-Link master is connected or in case of
defective IO-Link connection.
Via IO-Link the power supply can communicate current status, in-/output values and it is also possible to configure the output voltage(see chapter 10 Remote Control of Output Voltage) as well as to remotely shut-down the power supply (described in chapter 9 Remote
Control of Shut-down).
Fig. 8-1 IO-Link Interface Pin Assignment

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

In order to operate the IO-Link interface it is required to install/upload the IODD-File (IO-Link Device Description) into the connected IOLink master in the first step. The most recent IODD File can be found on the PULS website (www.pulspower.com) in the productdownload section of the product page of QT40.241-B2. The device can be accessed via IO-Link also, if the power supply is not connected
to AC-mains and switched off.
IO-Link Version
Baud-Rate
Cycle Time
SIO-Mode
Process Data Length

V1.1
COM3 (230.4 kBaud)2ms
no
16bit, 2byte

To get full performance, it is recommended to use IO-Link masters with V1.1
Cycle time refers to the Process Data communication speed

The power supply provides three types of data via IO-Link. The first dataset is called process data and refers to data that is periodicallysent to the IO-Link master. The length is 2Byte and the data is updated and communicated every 2ms. All other data in the power supply
itself is generated every 50ms and stored in the IO-Link registers.
The second set of data is called parameter values. The parameter values can be accessed to read out additional data (e.g. current output
voltage, temperatures etc.), but in addition some of these values can also be written by the user to configure the power supply (e.g.
output voltage and remote on/off).
Events are the third set of data. This information is triggered by certain situations and will result in an event notification to the IO-Link
master. Typical events are notification in case of ideal (e.g. DC-OK) and non-ideal situations (e.g. ambient temperature too hot, highinput voltage etc.).
All data types used in QT40.241-B2 are listed and described in the following. For additional information on remote shut-down as well as
output voltage adjustment, please refer to chapter Remote Control of Shut-down9 and 10.
Cyclic Data – Process Data
Output current (A)Output current value (2 Bytes) between 0-80A to monitor current load attached to the power supply with anaccuracy of 800mA. This value is communicated to the IO-Link master every 2ms.

Acyclic Data – Parameters
User specific number or text with a maximum of 32 bytes(R/W)
Output voltage setpoint
Adjustment value of output voltage (V), pre-set to 24.1V; This data is stored in the EEPROM of the power
supply, so that the power supply keeps the adjusted output voltage also in case of no IO-Link communication.
The power supply is equipped with a hardware protection mechanism in order to prevent unauthorizedadjustment of it output voltage. Please refer to chapter 10, if output voltage has to be adjusted.
(R/W)
Average value of last 2 minutes in (%); The stress level is calculated between output current in relation to the
maximum allowed output current.
Stress level(read-only)
Estimated lifetime in percent (%); based on the power supply’s capacitor temperature, this percentage value
decreases over time and can be used for preventive maintenance. High capacitor temperatures accelerate
the decrease of lifetime. Please note, that an expired life time does not indicate a break-down of a power
Remaining life time
supply, but it indicates, that wear-out and aging might impact the originally specified values.
(read-only)
Incoming air temperature (°C) between -45°C to 150°C; the power supply is equipped with a thermal sensor
on the bottom of the device. Since this product is convection cooled, this value gives an indication of theambient air temperature. To use this feature, it is mandatory to mount the device in an upright position
Temperature airflow(orientation A), as explained in chapter 25.13. Other mounting orientations might be subject to hightemperature warnings as described in the chapter “events”.
(read-only)
Max. temperature airflow Recorded maximum temperature (°C) between -45°C to 150°C since last turn on of power supply (read-only)
Temperature primaryComponent temperature (°C) on the primary side inside the power supply; values between -45°C to 150°C
inside(read-only)
User specific marking

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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Q-Series

Max. temperature
primary inside
Operating time

Operating time

Transient counter overall

Transient counter last 2
minutes
Actual input voltage

Actual output voltage

Turn-on counter

Uptime since last turn-on

Uptime since last turn-on
EEPROM Status

Shut down

Recorded maximum temperature on the primary side inside the power supply since last turn on; value
between -45°C to 150°C(read-only)
Cumulated overall operating time in hours (h) stored in power supply’s EEPROM;
maximum value: 262800h = 30 years(read-only)
Cumulated overall operating time in minutes (min) stored in power supply’s EEPROM;
maximum value: 59min(read-only)
Overall amount of significant input transients, that are detected by the power supply’s input stage;
Maximum value: 7200000(read-only)
Overall amount of significant input transients, that are detected by the power supply’s input stage;
Maximum value: 7200000(read-only)
RMS value of input voltage (V); maximum value: 1130V(read-only)
Value of the actual output voltage (V); maximum value: 40VThis value shows the actual output voltage and can be used to detect feedback voltages in the DC-grid. If theactual output voltage is higher than the adjusted output voltage of the power supply, a back-feeding load is
active.
(read-only)
Cumulated number of power supply turn-ons; this value is stored in the EEPROM of the power supply.
Maximum value: 7200000(read-only)
Operating time in hours (h) since last power supply bootup;
Maximum value: 1000000(read-only)
Operating time in minutes (min) since last power supply bootup
Maximum value: 59(read-only)
A logic "1" indicates that the integrated EEPROM is ok(read-only)
A logic "1" turns output off and a logic “0” turns on the output again.
Please refer to chapter 9 for further information to shut-down the power supply output. To use this feature itis essential not to power the IO-Link master from the power supply, which has received a remote shut-down
signal.
(R/W)

Acyclic Data – Events
DC-OK
DC-Warning
BonusPowerOver temperature(capacitors)
Over temperature(airflow)

As soon as the output voltage reaches 90% of the adjusted output voltage.
As soon as the output voltage dips more than 10% below the adjusted output voltage.
Short dips will be extended to a signal length of 250ms. Dips shorter than 1ms will be ignored.
Power supply provides BonusPower and the output current >105%, please see Fig. 6-1
Temperature of capacitors >95°C; operating the power supply with hot capacitors decreases the lifetime ofthe power supply. Please review ambient temperature (airflow temperature) and/or cross check load profile.
Inside air temperature sensor detects a temperature >65°C; it is mandatory to mount the device in an uprightposition (orientation A), as explained in chapter 25.13. Other mounting orientations might be subject tomisleading high temperature warnings.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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Q-Series

OverloadHigh voltage on input
Low voltage on input

Power supply down

Predictive maintenancerecommended
2-Phase operation

Humidity

Device operates in current limiting mode, please see Fig. 6-1. The current is limited actively to 40A (24V
reference). Please check wiring on connection resistance and/or review load’s power demand.
Input voltage above the specified value of 576Vac; please check application on the input of power supply.
Input voltage below the specified value of 323Vac; please check application on the input of power supply.
Input power supply failures; this event is triggered, if the communication board lost connection to the power
supply controller. It indicates an AC power down or a defective power supply. Please refer to log events in themaster/PLC to find information on the root cause (e.g. low input voltage) and check if other events (e.g. hightemperature warnings) have been active. The events are not logged in the power supply, so it isrecommended to log events in the master/PLC.
Operating hours exceeded the calculated lifetime hours; this event recommends preventive exchange of thepower supply. Please note, that an expired life time does not indicate a break-down of a power supply, but it
indicates, that wear-out and aging might impact the originally specified values.
Indicates a missing leg of the 3-phase if unit is loaded with more than 20A, see chapter Using only 2 Legs of a
3-Phase System25.4; please check input wiring and if intended 2-Phase operation, please note reduced
performance as described in chapter 25.4.
Humidity too high or water/liquid contamination; Please check application and environment to avoid
damage, assure safety and reduce humidity. The power supply is specified for usage in environments as
described in chapter 17.

Parallel-Use with automated load regulation:
It is possible to operate multiple paralleled power supplies (as described in chapter 25.7 and/or 25.8) with and without a load sharing
mode. To activate load sharing, please place jumper into the parallel slot. Then turn limiter to the maximum voltage required in theapplication (e.g. 25.1Vdc) and then enter a slightly higher value in IO-Link (e.g. 25.1Vdc+1Vdc = 26.1Vdc). The load sharing mode is thenactivated and the acyclic data set “actual output voltage” will return the actual self-adjusted output voltage value. The self-adjusting
load regulation will regulate up 1000mV automatically.

9. REMOTE CONTROL OF SHUT-DOWN
To use this feature it is essential not to power the IO-Link master from the power supply, which is subject to remote shut-down itself.
Please assure an independent power supply for the IO-Link master according to the specification of the master (e.g. 8-port IO-Link
masters can typically be operated with PULS PIM90.241 or CP5.241 or CT5.241) and do use the IO-Link power supply QT40.241-B2 only
for powering the load lines.
This feature allows a switch-off of the output of the power supply with a logic “1” in the acyclic parameter data set “Shut down”,
described in chapter 8. The shut-down occurs immediately while the turn-on is delayed up to 350ms. In a shut-down condition, theoutput voltage is <2V and the output power is <0.5W.
There are two typical use cases for remote shut-down of the device:

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

A.

Energy Saving

Input
Power losses

typ.
typ.

380Vac
1.5W
9.5W

480Vac
1.5W
9.8W

with activated shut-down
at 24V, 0A (no load)

Using remote shut-down will therefore result in a saving of 8.3W; Assuming a 8h downtime every workday, this feature can generate asaving of 8h*5*4*8.3W= 1.33kWh per month and per power supply.

B.

MaintenanceIn case of maintenance situation, where loads have to be disconnected but sensor voltages have to stay available, the remote shut-downfunction can be used. Please note, that the communication protocol is IO-Link V1.1 and not IO-Link Safety; for safety relevant shut-downs,
it is prohibited to use this function.

10. REMOTE CONTROL OF OUTPUT VOLTAGE
The standard pre-set value of the output voltage is 24.1V, but the power supply can be set to any output voltage between 15V to 28.5Vdc via IOLink using the acyclic parameter data set “Output voltage setpoint” as mentioned in chapter 8.
It is recommended to operate above 24V, since the usage from 15Vdc to 24Vdc is not specified in this datasheet, but theoretically possible. The
power supply is equipped with a hardware protection mechanism in order to prevent unauthorized adjustment of its output voltage.
To adjust the output voltage of the power supply, please take the following steps:
1)
2)
3)

4)
5)

Establish a stable IO-Link communication with the power supply (it is recommended to connect the power supply to AC-mains)
In the software environment, please navigate to the section “acyclic data – parameters”
Enter the desired value to the data field “Output voltage setpoint” and submit the new value to the power supply•

If hardware protection is required:
Please connect the power supply to AC-mains and switch it on
Navigate to “acyclic data – parameters” and read the data field “Actual output voltage”
If the actual output voltage value is lower, than the programmed output voltage, please adjust the limiter on the front of the productby a few right turns (if actual output voltage too low) or by a few left turns (if the actual output voltage is too high). After this, pleaserefresh the data field “Actual output voltage” and compare with the programmed output voltage. Please repeat this procedure until
the actual output voltage is exactly the value of the set output voltage.

•

If hardware protection is not required:
Please move the limiter on the front of the power supply to the very right position with a few turns. The hardware limitation willallow the maximum of 28.5V output voltage. No hardware protection is in place. It is now possible to adjust voltages up to 28.5V via
IO-Link and all connected loads have to be capable of 28.5V.

The power supply is now operating with the adjusted output voltage
To verify the adjusted output voltage, please navigate to “acyclic data – parameters” and read the data field “Actual output voltage”. Thisvalue should now be the same as the adjusted output voltage. If not, please continue with step 3).

This data is stored in the EEPROM of the power supply, so that the power supply keeps the adjusted output voltage also in case of no IO-Link
communication or if the power supply is disconnected from AC-mains.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

11. EFFICIENCY AND POWER LOSSES
Efficiencies for 3-Phase operation:
Efficiency
Average efficiency*)
Power losses*)

3AC 400V
95.3%
94.7%
1.5W
9.5W
24.1W
47.3W

typ.
typ.
typ.
typ.
typ.
typ.

3AC 480V
95.2%
94.6%
1.5W
9.8W
25.0W
48.4W

at 24V, 40A
25% at 10A, 25% at 20A, 25% at 30A. 25% at 40A
with activated shut-down
at 24V, 0A (no load)
at 24V, 20A (half load)
at 24V, 40A (full load)

The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25% of the time, 50% of
the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100% of the nominal load for the rest of thetime.

Efficiencies when using only 2 legs of a 3-phase system:
Efficiency

typ.

2AC 400V
94.4%**)

2AC 480V
94.7%**)

at 24V, 40A

Power losses

typ.

56.9W**)

53.7W**)

at 24V, 40A (full load)**) Curves can be found in chapter 25.4

Fig. 11-1 Efficiency vs. output current at 24V, typ.

Fig. 11-2 Losses vs. output current at 24V, typ.

Efficiency

Power Losses

96%

3x400Vac

60W
3x480Vac50953x480Vac

94

40
3x400Vac

30
20

93

10
Output Current

928Output Current

0

12 16 20 24 28 32 36 40A

Fig. 11-3 Efficiency vs. input voltage at 24V, 40A, typ.

0

4

8 12 16 20 24 28 32 36 40A

Fig. 11-4 Losses vs. input voltage at 24V, 40A, typ.

Efficiency

Power Losses

95.5%

50W

95.4

49

95.3

48

95.2

47

95.1

46
45

95.0
94.9
350

Input Voltage

400

450

500 3x550Vac

44
350

Input Voltage

400

450

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

500 3x550Vac

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Q-Series

12. LIFETIME EXPECTANCY AND MTBF
QT40.241
Calculated lifetime expectancy*)

3AC 400V
69 000h86 000h
114 000h
196 000h*)
244 000h*)
322 000h*)

3AC 480V
66 000h81 000h
112 000h
186 000h*)
230 000h*)
316 000h*)

at 24V, 40A and 40°C
at 24V, 32A and 40°C
at 24V, 20A and 40°C
at 24V, 40A and 25°C
at 24V, 32A and 25°C
at 24V, 20A and 25°C

QT40.242
Calculated lifetime expectancy*)

3AC 400V
93 000h
132 000h
168 000h*)
262 000h*)
373 000h*)
475 000h*)

3AC 480V
91 000h
128 000h
167 000h*)
258 000h*)
363 000h*)
472 000h*)

at 24V, 40A and 40°C
at 24V, 32A and 40°C
at 24V, 20A and 40°C
at 24V, 40A and 25°C
at 24V, 32A and 25°C
at 24V, 20A and 25°C

QT40.241, QT40.242
MTBF**) SN 29500, IEC 61709

3AC 400V
375 000h
685 000h
158 000h
211 000h

3AC 480V
369 000h
678 000h
157 000h
210 000h

at 24V, 40A and 40°C
at 24V, 40A and 25°C
at 24V, 40A and 40°C; Ground Benign GB40
at 24V, 40A and 25°C; Ground Benign GB25

MTBF**) MIL HDBK 217F*)

The calculated lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime expectancy ofthe built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours and is calculated according to the capacitor’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 a device. It is the statisticalrepresentation 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 that statistically one unit will failevery 100 hours if 10 000 units are installed in the field. However, it cannot be determined if the failed unit has been running for 50 000h or only for 100h.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

13. FUNCTIONAL DIAGRAM
Fig. 13-1 Functional diagram

Single /Parallel

OutputVoltage
Regulator

L1
L2
L3

Input Fuse
Input Filter
Input Rectifier
Inrush Current
LimiterTemperature
Shutdown

PFC
Converter

OutputPower
ManagerPower
Converter

OutputOverVoltage
Protection

VOUT
Limiter++-

OutputFilterOverload
LED
DC-OK
LED

IO-Link
Interface

M12

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

IO-Link
Communication

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24V, 40A, THREE PHASE INPUT

Q-Series

14. TERMINALS AND WIRING
The terminals are IP20 Finger safe constructed and suitable for field and factory wiring.
Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter
Wire stripping length
Screwdriver
Recommended tightening torqueInput
screw terminal
0.5-6mm2
0.5-4mm2
AWG 20-10
2.8mm(including ferrules)
7mm
3.5mm slotted or cross-head
No 2
0.8Nm

Outputscrew terminal
0.5-16mm2
0.5-10mm2
AWG 22-8
5.2mm(including ferrules)
12mm
3.5mm or 5mm slotted or
cross-head No 2
2Nm

IO-Link
A-coded M12 male
Screw-nut might require
wrench
0.6Nm

Instructions:a) 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 minimum
90°C for ambient up to 70°C minimum.
b) Follow national installation codes and installation regulations!
c) Ensure that all strands of a stranded wire enter the terminal connection!
d) Do not use the unit without PE connection.
e) Unused terminal compartments should be securely tightened.
f) Ferrules are allowed.
Daisy chaining:
Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current through one
terminal pin does not exceed 54A. If the current is higher, use a separate distribution terminal block as shown in Fig. 14-2.
Fig. 14-1 Daisy chaining of outputs

Fig. 14-2 Using distribution terminals

Distribution
Terminals

Power
SupplyPower
Supply+ + - -

+ + - -

Load

OutputOutput+-Power
SupplyPower
Supply+ + - -

+ + - -

Load

OutputOutput+-max 54A!

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

15. FRONT SIDE AND USER ELEMENTS
Fig. 15-1 Front sideA

Input Terminals (Screw terminals)
L1, L2, L3 Line input...PE (Protective Earth) input
Output Terminals (Screw terminals, two pins per pole)+
Positive output–
Negative (return) output
C “Parallel Use” “Single Use” Selector
Please refer to chapter 8 on IO-Link Interface
D Output Voltage Limiter
Multi turn potentiometer;
Open the flap to set the output voltage limit.
Please refer to chapter 10 for details
Factory set: 24.1V at full output current
E DC-OK LED (green)
On, when the voltage on the output terminals is >90% of theadjusted output voltage
F Overload LED (red)- On, when the voltage on the output terminals is <90% of theadjusted output voltage, or in case of a short circuit in the output.
- Flashing, when the shut-down has been activated or the unit has
switched off due to over-temperature.
- Input voltage is required
G IO-Link Communication LED (green/red)- Green flashing, when communication is active- Green on, when IO-Link powered.
- Green off, when IO-Link not powered.
- Red on, when IO-Link event is triggered- Red off, when no event or DC-OK
H IO-Link Connector M12 A-coded maleB

Indicators, LEDs
Normal mode
During BonusPower
Overload (Vout < 90%)
Output short circuit
Temperature Shut-down
Active Shut-down input
No input power
No IO-Link power
No IO-Link connection
IO-Link connection active
IO-Link event

Overload LED
OFF
OFF
ON
ON
Flashing
Flashing
OFF

DC-OK LED
ON
ON
OFF
OFF
OFF
OFF
OFF

IO-Link LED

Green OFF
Green ON
Green flashing
Red ON

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

16. EMCThe power supply is suitable for applications in industrial environment as well as in residential, commercial and light industry
environment without any restrictions. A detailed EMC report is available on request.
All results assume a three phase operation of the power supply.
EMC Immunity
Electrostatic discharge
Electromagnetic RF field
Fast transients (Burst)

Surge voltage on input
Surge voltage on output
Surge voltage on DC-OK
Conducted disturbance
Mains voltage dips
(Dips on three phases)
Mains voltage dips
(Dips on two phases)

Voltage interruptions
Voltage sags

Powerful transients

According generic standards: EN 61000-6-2
EN 61000-4-2
contact discharge
8kV
Criterion A
air discharge
15kV
Criterion A
EN 61000-4-3
80MHz-2.7GHz
10V/m
Criterion A
EN 61000-4-4
input lines
4kV
Criterion A
output lines
2kV
Criterion A
DC-OK signal (coupling clamp)
2kV
Criterion A
EN 61000-4-5
L1 → L2, L2 → L3, L1 → L3
2kV
Criterion A
L1 / L2 / L3 → PE
4kV
Criterion A
EN 61000-4-5+→1kV
Criterion A+ / - → PE
1kV
Criterion A
EN 61000-4-5
DC-OK signal → PE
1kV
Criterion A
EN 61000-4-6
0.15-80MHz
10V
Criterion A
0% of 380Vac (0Vac)
0Vac, 20ms
Criterion A,
EN 61000-4-11
0% of 480Vac (0Vac)
0Vac, 20ms
Criterion A
EN 61000-4-11
40% of 380Vac (152Vac)
200ms
Criterion A
40% of 480Vac (192Vac)
200ms
Criterion A
70% of 380Vac (266Vac)
500ms
Criterion A
70% of 480Vac (336Vac)
500ms
Criterion A
EN 61000-4-11
0Vac
5000msCriterion C
SEMI F47
dips on two phases according to chapter 7.2. of the SEMI F47 standard
80% of 380Vac (304Vac)
1000msCriterion A
70% of 380Vac (266Vac)
500ms
Criterion A
50% of 380Vac (160Vac)
200ms
Criterion A
VDE 0160
over entire load range
1550V, 1.3ms
Criterion A

Criterions:
A: Power supply shows normal operation behavior within the defined limits.
C: Temporary loss of function is possible. Power supply may shut-down and restarts by itself. No damage or hazards for the power supply will occur.

EMC Emission
Conducted emission
input lines
Conducted emission
output lines

According generic standards: EN 61000-6-4
EN 55011, EN 55032, FCC Part 15, CISPR 11, CISPR 32
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1

Class B
5dB higher than average limits for
DC power port according EN 610006-3
Class Afulfilled for class A equipment
fulfilled*)

Radiated emission
EN 55011, EN 55032
Harmonic input current
EN 61000-3-2
Voltage fluctuations, flicker
EN 61000-3-3This device complies with FCC Part 15 rules.
Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
*)

Tested with constant current loads, non-pulsing

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

Switching Frequencies

The power supply has three converters with three different switching frequencies included. One isnearly constant. The others are variable.
105kHzResonant converter, nearly constant
1kHz to 150kHz
Boost converter, load dependent
40kHz to 300kHzPFC converter, input voltage and load dependent

Switching frequency 1
Switching frequency 2
Switching frequency 3

17. ENVIRONMENT
Operational temperature*)
Storage temperature
Output derating
Humidity**)Vibration sinusoidal-25°C to +70°C-40 to +85°C
20W/°C
5 to 95% r.H.
2-17.8Hz: ±1.6mm; 17.8-500Hz: 1g***)2 hours / axis
15g 6ms, 10g 11ms***)3 bumps / direction, 18 bumps in total
0 to 2000m
2000 to 6000m

Shock
Altitude

Altitude derating
Over-voltage category

reduce output power according Fig. 17-1
for storage and transportation
55-70°C
IEC 60068-2-30
IEC 60068-2-6
IEC 60068-2-27
without any restrictions
reduce output power or ambient temperature,
see Fig. 17-2
IEC 62103, EN 50178, overvoltage category II> 2000m, see Fig. 17-2
IEC 62103, EN 50178, altitudes up to 2000m
altitudes from 2000m to 6000m
IEC 62103, EN 50178, not conductive

60W/1000m or 5°C/1000m
III
II
2

Degree of pollution*)

Operational temperature is the same as the ambient or surrounding temperature and is defined as the air temperature 2cm below the unit. Curves andfigures for operation on only 2 legs of a 3-phase system can be found in chapter 25.4.
**) Do not energize while condensation is present.
***) Higher levels allowed when using the wall mounting bracket ZM2.WALL

Fig. 17-1 Output current vs. ambient temp.

Fig. 17-2 Output current vs. altitude

Allowed Output Current at 24V

Allowed Output Current at 24V

60A

60A

short-term (5s)continuous

40

30

20

20

10

10
-25

0

continuous

40

30

0

short-term (5s)

50

50

20

40

55 70°C

0

A

C

B

A... Tamb < 60°C
B... Tamb < 50°C
C... Tamb < 40°C

0

2000

Ambient Temperature

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

4000

6000m
Altitude

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24V, 40A, THREE PHASE INPUT

Q-Series

18. PROTECTION FEATURES
Output protection
Output over-voltage protection

Degree of protection

Penetration protection
Over-temperature protection
Input transient protection
Internal input fuse*)

Electronically protected against overload, no-load and short-circuits*)
typ. 30Vdc
In case of an internal power supply defect, a redundant circuit
limits the maximum output voltage. The output shuts down andmax. 32Vdc
automatically attempts to restart.
IP 20
EN/IEC 60529
Caution: For use in a controlled environment according to CSA
22.2 No 107.1-01.
> 5mm
e.g. screws, small partsyes
Output shut-down with automatic restart
MOV (Metal Oxide Varistor)
included
not user replaceable

In case of a protection event, audible noise may occur.

19. SAFETY FEATURES
The supply voltage for the IO-Link must be powered from a PELV or SELV source or an "Isolated Secondary Circuit" in order to maintain a
SELV or PELV output. Do not connect the IO Link port to any other equipment except industrial control equipment.
Input / output separation*)

Class of protection
Isolation resistancePE resistance
Touch current (leakage current)

*)

SELV
IEC/EN 61010-2-201
PELV
IEC/EN 61010-2-201, IEC/EN 60204-1, IEC 60364-4-41
double or reinforced insulation
I
PE (Protective Earth) connection required> 100MOhm
input to output, 500Vdc< 0.1Ohm
typ. 0.35mA / 0.64mA
3x400Vac, 50Hz, TN-,TT-mains / IT-mains
typ. 0.45mA / 0.91mA
3x480Vac, 60Hz, TN-,TT-mains / IT-mains
max. 0.45mA / 0.78mA
3x440Vac, 50Hz, TN-,TT-mains / IT-mains
max. 0.60mA / 1.20mA
3x528Vac, 60Hz, TN-,TT-mains / IT-mains

double or reinforced insulation

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

20. DIELECTRIC STRENGTH
The output voltage is floating and has no ohmic connection to the ground. Type and factory tests are conducted by the manufacturer.
Field tests may be conducted in the field using the appropriate test equipment which applies the voltage with a slow ramp (2s up and 2sdown). Connect all phase terminals together as well as all output poles before conducting the test. When testing, set the cut-off current
settings to the value in the table below.
Type test

60s

A
2500Vac

B
3000Vac

C
500VacD
500VacFactory test

5s

2500Vac

2500Vac

500Vac

500VacField test

5s

2000Vac

2000Vac

500Vac

500VacCut-off current setting> 10mA> 10mA> 40mA> 1mA

Fig. 20-1 Dielectric strength

Input
L1
L2
L3

B

A

B*)

Earth

IO-LinkPort

D
OutputC+/-

To fulfil the PELV requirements according to EN 60204-1 § 6.4.1, werecommend that either the + pole, the – pole or any other part of the output
circuit shall be connected to the protective earth system. This helps to avoid
situations in which a load starts unexpectedly or cannot be switched off
when unnoticed earth faults occur.

B*) When testing input to DC-OK ensure that the max. voltage between DC-OK and the output is not exceeded (column D). We recommend connecting DC-OK
pins and the output pins together when performing the test.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

21. APPROVED, FULFILLED OR TESTED STANDARDSSEMI 47

Test Report
Voltage Sag Immunity for Semiconductor Processing Equipment
Tested for AC 208V L-L or L-N mains voltages, nominal output voltage
and nominal output load

VDMA 24364

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

22. REGULATORY PRODUCT COMPLIANCE
EU Declaration of Conformity

REACH Regulation (EU)

WEEE Regulation

UKCA

The CE mark indicates conformance with the- EMC directive- Low-voltage directive- RoHS directive
Manufacturer's Declaration
EU regulation regarding the Registration, Evaluation, Authorisation
and Restriction of Chemicals (REACH) fulfilled.
EU Regulation (EC) 1907/2006.
Manufacturer's Declaration
EU Regulation on Waste Electrical and Electronic Equipment
Registered as business to business (B2B) products.
EU Regulation 2012/19/EU
UKCA Declaration of Conformity
Trade conformity assessment for England, Scotland and WalesThe UKCA mark indicates conformity with the UK Statutory
Instruments
2016 No.1101,
2016 No.1091,
2012 No.3032

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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24V, 40A, THREE PHASE INPUT

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23. PHYSICAL DIMENSIONS AND WEIGHT
WeightDIN rail

Installation Clearances

1500g
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. 23-1 Front viewFig. 23-2 Side view

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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QT40.241-B2
24V, 40A, THREE PHASE INPUT

Q-Series

24. ACCESSORIES

24.1. ZM2.WALL - WALL MOUNTING BRACKETThis bracket is used to mount specific DIMENSION units onto a flat surface without utilizing a DIN rail.

24.2. UF20.241 - BUFFER MODULE
This buffer unit is a supplementary device for DC 24V power supplies. It delivers power to bridge
typical mains failures or extends the hold-up timePower
Bufferafter turn-off of the AC power. In times when the
LoadAC
SupplyUnit(s)power supply provides sufficient voltages, the+buffer unit stores energy in integrated electrolyticDC
capacitors. In case of mains voltage fault, thisenergy is released again in a regulated process.
One buffer module can deliver 20A. To buffer the full output current of 40A, two buffer modules
are needed in parallel.
The buffer unit does not require any control wiring. It can be added in parallel to the load circuit
at any given point. Buffer units can be added in parallel to increase the output ampacity or the
hold-up time.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series24.3. YR80.241 - REDUNDANCY MODULEThe YR80.241 is equipped with two input channels (40A each), which are individually decoupled by utilizing
mosfet technology. The output current can go as high as 80A.
Using mosfets instead of diodes reduces the heat generation and the voltage drop between input andoutput. The YR80.241 does not require an additional auxiliary voltage and is self-powered even in case of ashort circuit across the output.
Due to the low power losses, the unit is very slender and only requires 46mm width on the DIN rail.

Fig. 24-1 Typical 1+1 Redundant configuration for 40A with a dual redundancy module
24V
40A
Load

QT40.241
24-28V 960W
Power Supply
Parallel Use

IO-Link

24V, 40A

I

I

I

QT40.241
24-28V 960W
Power Supply

OutputSingle Use

L1 L2 L3 PE

IO-Link Master(Failure Monitor)

+ +

- -

YR80.241
Redundancy
Module
Input
1

+ -

Parallel Use

IO-Link

Single Use

Input
2

24V, 40A+ -L1 L2 L3 PE

I

I

+ +

- -

I

L1
L2
L3
PE

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

25. APPLICATION NOTES
25.1. REPETITIVE PULSE LOADING
Typically, a load current is not constant and varies over time. This power supply is designed to support loads with a higher short-term
power demand (=BonusPower). The short-term duration is hardware controlled by an output power manager and is available on arepeated basis. If the BonusPower load lasts longer than the hardware controller allows it, the output voltage will dip and the next
BonusPower is available after the BonusPower recovery time (see chapter 6) has elapsed.
To avoid this, the following rules must be met:a)
The power demand of the pulse must be below 150% of the nominal output power.
b)
The duration of the pulse power must be shorter than the allowed BonusPower time. (see output chapter)c)
The average (R.M.S.) output current must be below the specified continuous output current.
If the R.M.S. current is higher, the unit will respond with a thermal shut-down after a period of time. Use the maximum duty cycle
curve (Fig. 25-2) to check if the average output current is below the nominal current.
d)
The duty cycle must be below 0.75.
Fig. 25-1 Repetitive pulse loads, definitions

Fig. 25-2 Max. duty cycle curve

P0 = 10%
P0 = 50%
P0 = 75%

Duty Cycle

PPEAK TPEAK

T0

0.75

max.
150%

0.6

100%

0.4

P0 = 100%

0.2

P0

PPEAK

0
100

P0
PPEAK
T0
TPEAK

Example:Base load (W)Pulse load (above 100%)
Duration between pulses (s)Pulse duration (s)110DutyCycle =

T0 =

120

130

140

150%

Tpeak
Tpeak + T0

Tpeak - (DutyCycle x Tpeak)
DutyCycle

A load is powered continuously with 480W (= 50% of the rated output load). From time to time a peak power of 1440W(= 150% of the rated output load) is needed for 1 second.
The question is: How often can this pulse be supplied without overloading the power supply?
- Make a vertical line at PPEAK = 150% and a horizontal line where the vertical line crosses the P0 = 50% curve. Read themax. duty cycle from the duty cycle-axis (= 0.37)- Calculate the required pause (base load) length T0:- Result: The required pause length = 1.7s

T0=

Tpeak - (DutyCycle x Tpeak)- Max. repetition rate = pulse +pause length = 2.7s

DutyCycle=

1s- (0.37 x 1s)
0.37

=1.7s

More examples for pulse load compatibility:
PPEAK
1440W
1440W
1200W

P0
960W
0W
480W

TPEAK
1s
1s
1s

T0
>25s
>1.3s
> 0.75s

PPEAK
1440W
1440W
1440W

P0
480W
480W
480W

TPEAK
0.1s
1s
3s

T0
>0.16s
>1.6s>4.9s

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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24V, 40A, THREE PHASE INPUT

Q-Series

25.2. PEAK CURRENT CAPABILITY
The power supply can deliver peak currents (up to several milliseconds) which are higher than the specified short term currents.
This helps to start current demanding loads. Solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up
coil. The inrush current demand of the pick-up coil is several times higher than the steady-state current and usually exceeds the nominal
output current (including the BonusPower). The same situation applies when starting a capacitive load.
The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The load branches are often
individually protected with circuit breakers or fuses. In case of a short or an overload in one branch circuit, the fuse or circuit breakerneed a certain amount of over-current to open in a timely manner. This avoids voltage loss in adjacent circuits.
The extra current (peak current) is supplied by the power converter and the built-in large sized output capacitors of the power supply.
The capacitors get discharged during such an event, which causes a voltage dip on the output. The following two examples show typicalvoltage dips:
Fig. 25-3 Peak load with 2x the nominal current for 50ms,
typ.

OutputVoltage

24V
80A

Fig. 25-4 Peak load with 5x the nominal current for 5ms,
typ.

OutputVoltage

24V
200A

20V

12V
OutputCurrent

0A

1ms/DIV

10ms/DIV

80A Peak load (resistive) for 50ms
Output voltage dips from 24V to 20V.

Peak current voltage dips

OutputCurrent

0A

200A Peak load (resistive) for 5ms
Output voltage dips from 24V to 12V.

typ.
typ.
typ.

from 24V to 20V
from 24V to 12V
from 24V to 12V

at 80A for 10ms, resistive load
at 200A for 2ms, resistive load
at 200A for 5ms, resistive load

25.3. EXTERNAL INPUT PROTECTION
The unit is tested and approved for branch circuits up to 30A (U.S.A.) and 32A (IEC). An external protection is only required if the
supplying branch has an ampacity greater than this. Check also local codes and local requirements. In some countries local regulations
might apply.
If an external fuse is necessary or utilized, minimum requirements need to be considered to avoid nuisance tripping of the circuit
breaker. A minimum value of 6A B- or C-Characteristic breaker should be chosen.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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QT40.241-B2
24V, 40A, THREE PHASE INPUT

Q-Series

25.4. USING ONLY 2 LEGS OF A 3-PHASE SYSTEM
L1
L2
L3
PE

No external protection devices are required to protect against a phase-loss failure.
This power supply can also be permanently operated on two legs of a 3-phase system.
However, it is not recommended for this power class since the supplying 3-phasenetwork can become unbalanced.

Power Supply

AC
L1
L2

The output power must be reduced according to the curves below when operation on
only two legs of a 3-phase system. A long-term exceeding of these limits will result in athermal shut-down of the unit.

open

L3

DC

A use below 340Vac with more than 30A output current can also result in a thermal shut-down.
During power-on, some start-up attempts can occur until a permanent output power is available.
EMC performance, hold-up time, losses and output ripple differ from a three phase operation. Therefore, check suitability of yourindividual application.
Such use is not included in the UL approval. Additional tests might be necessary when the complete system has to be approved
according to UL 508 or UL60950-1.
The screw of the terminal which remains unused must be securely tightened.
Fig. 25-5
Output current vs. ambient temperature

Fig. 25-6
Hold-up time vs. input voltage

Allowed Output Current for Use on only Two
Legs of a 3-Phase System

Hold-up Time for Use on only Two Legs of aThree Phase System

40A
C

30
A... 2x 460 to 552Vac
B... 2x 340 to 460Vac
C... max. 60 seconds

30
24V, 40A, typ.
24V, 40A, min.

20

10
0
-25

24V, 20A, typ.
24V, 20A, min.

40

B A

20

50ms

10
0

20

40

Input Voltage

0320

60 70°C

Ambient Temperature

Fig. 25-7
Efficiency vs. output current at 24V

360

400

440

Fig. 25-8
Losses vs. output current at 24V

Efficiency for Use on only
Two Legs of a 3-Phase System

Power Losses for Use on only
Two Legs of a 3-Phase System

96%

60W
2x480Vac95

2x400Vac50402x400Vac94

3x480Vac

2x480Vac

30

93

20
Output Current

928Output Current

10

12 16 20 24 28 32 36 40A

04

8 12 16 20 24 28 32 36 40A

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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QT40.241-B2
24V, 40A, THREE PHASE INPUT

Q-Series

25.5. CHARGING OF BATTERIESThe power supply can be used to charge lead-acid or maintenance free batteries. (Two 12V batteries in series)
Instructions for charging batteries:a)

Set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge voltage.
End-of-charge voltage

27.8V

27.5V

27.15V

26.8V

Battery temperature

10°C

20°C

30°C

40°C

b)

Use a 50A or 63A circuit breaker (or blocking diode) between the power supply and the battery.

c)Ensure that the output current of the power supply is below the allowed charging current of the battery.

d)Use only matched batteries when putting 12V types in series.

e)

The return current to the power supply (battery discharge current) is typ. 35mA when the power supply is switched off (except incase a blocking diode is utilized).

25.6. OUTPUT CIRCUIT BREAKERS
Standard miniature circuit breakers (MCB’s or UL1077 circuit breakers) are commonly used for AC-supply systems and may also be usedon DC branches.
MCB’s are designed to protect wires and circuits. If the ampere value and the characteristics of the MCB are adapted to the wire sizethat is used, the wiring is considered as thermally safe regardless of whether the MCB opens or not.
To avoid voltage dips and under-voltage situations in adjacent 24V branches which are supplied by the same source, a fast (magnetic)
tripping of the MCB is desired. A quick shutdown within 10ms is necessary corresponding roughly to the ride-through time of PLC's. Thisrequires power supplies with high current reserves and large output capacitors. Furthermore, the impedance of the faulty branch mustbe sufficiently small in order for the current to actually flow. The best current reserve in the power supply does not help if Ohm’s law
does not permit current flow. The following table has typical test results showing which B- and C-Characteristic MCBs magnetically trip
depending on the wire cross section and wire length.
Maximal wire length*) for a fast (magnetic) tripping:
0.75mm²
1.0mm²1.5mm²
C-2A
28m
38m
54m
C-3A
26m
35m
50m

Fig. 25-9 Test circuit

Power Supply

AC

MCB

+

+
Wire length

DC S1... Fault simulation switch

*)

Load

S1

-

2.5mm²
78m
74m

C-4A
C-6A

19m
12m

26m
16m

38m
24m

58m
32m

C-8A
C-10A
C-13A

9m
7m
4m

12m
10m
5m

17m
15m
7m

25m
21m
11m

B-6A
B-10A
B-13A

19m
11m
10m

26m
17m
13m

35m
26m
21m

59m
37m
32m

B-16A
B-20A

8m
4m

11m
6m

14m
8m

24m
14m

Don’t forget to consider twice the distance to the load (or cable length) when calculating the total wire length (+ and – wire).

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Q-Series

25.7. PARALLEL USE TO INCREASE OUTPUT POWER
Power supplies from the same series (Q-Series) can be paralleled to increase the output
power. The output voltage shall be adjusted to the same value (±100mV) in “Single use”
mode or without a placed jumper mode with the same load conditions on all units, orthe units can be left with the factory settings. For load sharing option in “parallel use”,
please refer to chapter 8 on the IO-Link Interface.

Unit AIf more than three units are connected in parallel, a fuse or circuit breaker with a ratingof 50A or 63A is required on each output. Alternatively, a diode or redundancy module
can also be utilized.

Unit B

AC

DC

AC

+
+
Load

+
-

-

DC
Keep an installation clearance of 15mm (left / right) between two power supplies andavoid installing the power supplies on top of each other. Do not use power supplies inparallel in mounting orientations other than the standard mounting orientation (terminals on the bottom of the unit) or in any othercondition where a derating of the output current is required (e.g. altitude, above 60°C, …).

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.

25.8. PARALLEL USE FOR REDUNDANCYPower supplies can be paralleled for redundancy to gain higher system availability. Redundant systems require a certain amount of extra
power to support the load in case one power supply unit fails. The simplest way is to put two power supplies in parallel. This is called a
1+1 redundancy. In case one power supply unit fails, the other one is automatically able to support the load current without any
interruption. Redundant systems for a higher power demand are usually built in a N+1 method. E.g. five power supplies, each rated for
40A are paralleled to build a 160A redundant system. For N+1 redundancy the same restrictions apply as for increasing the output
power, see also chapter 25.7.
Please note: This simple way to build a redundant system does not cover failures such as an internal short circuit in the secondary sideof the power supply. In such a case, the defective unit becomes a load for the other power supplies and the output voltage cannot be
maintained any more. This can be avoided by utilizing redundancy modules, which have decoupling devices (diodes or mosfets)
included. Further information and wiring configurations can be found in chapter 24.3.
Recommendations for building redundant power systems:
a)
b)
c)
d)

Use separate input fuses for each power supply. A separate source for each supply when possible increases the reliability of theredundant system.
Set the power supply into “Parallel Use” mode, please refer to chapter 8.
Monitor the individual power supply units. Therefore, use the DC-OK IO-Link event of the QT40 power supply.
It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Q-Series

25.9. SERIES OPERATIONPower supplies of the same type can be connected in series for higher output voltages.
It is possible to connect as many units in series as needed, providing the sum of theoutput voltage does not exceed 150Vdc. Voltages with a potential above 60Vdc are not
SELV any more and can be dangerous. Such voltages must be installed with a protection
against touching.
Earthing of the output is required when the sum of the output voltage is above 60Vdc.

Unit A

AC

DC

+
+

Unit B

Load

AC

Avoid return voltage (e.g. from a decelerating motor or battery) which is applied to the
output terminals.
DC+-

Keep an installation clearance of 15mm (left / right) between two power supplies andavoid installing the power supplies on top of each other. Do not use power supplies inseries in mounting orientations other than the standard mounting orientation (terminals on the bottom of the unit).

Earth(see notes)

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.

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

25.11. BACK-FEEDING LOADS
Loads such as decelerating motors and inductors can feed voltage back to the power supply. This feature is also called return voltage
immunity or resistance against Back- E.M.F. (Electro Magnetic Force).
This power supply is resistant and does not show malfunctioning when a load feeds back voltage to the power supply. It does not matter
whether the power supply is on or off.
The maximum allowed feed-back-voltage is 35Vdc. The absorbing energy can be calculated according to the built-in large sized output
capacitor which is specified in chapter 6. Feed-back-voltages can be detected and accessed via the IO-Link interface, as described inchapter 8.

25.12. USE IN A TIGHTLY SEALED ENCLOSURE
When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher than outside. In
such situations, the inside temperature defines the ambient temperature for the power supply.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
The power supply is placed in the middle of the box, no other heat producing items are inside the box
Enclosure:
Load:
Input:
Temperature inside enclosure:
Temperature outside enclosure:
Temperature rise:

Rittal Typ IP66 Box PK 9522 100, plastic, 254x180x165mm
24V, 32A; (=80%) load is placed outside the box
400Vac
57.5°C (in the middle of the right side of the power supply with a distance of 2cm)
23.6°C
33.9K

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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25.13. MOUNTING ORIENTATIONSMounting orientations other than all terminals on the bottom require a reduction in continuous 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 Recommended output current.
Curve A2 Max allowed output current (results in approximately half the lifetime expectancy of A1).
Fig. 25-10
Mounting
Orientation A(Standardorientation)

Output Current

40A

A1

30
Power
Supply20
10
Ambient Temperature0

INPUT OUTPUT

10
Fig. 25-11
Mounting
Orientation B(Upside down)

20

30

40

50

60°C

Output Current

40A
30

A2

20

A1

INPUT OUTPUT

Pow er
Supply10
Ambient Temperature

010Fig. 25-12
Mounting
Orientation C(Table-top
mounting)

20

30

40

50

60°C

Output Current

40A
30

A2
A1

20
10

Ambient Temperature

0
10

40

50

60°C

40A
Pow er
Supply

30

A2
A1

20
10
Ambient Temperature

0
10

20

30

40

50

60°C

Output Current
INPUT OUTPUT

40A
Pow er
SupplyFig. 25-14
Mounting
Orientation E(Horizontal ccw)

30

Output Current
INPUT OUTPUT

Fig. 25-13
Mounting
Orientation D(Horizontal cw)

20

30

A2
A1

20
10
Ambient Temperature

0
10

20

30

40

50

60°C

Aug. 2023 / Rev. 0.3 DS-QT40.241-B2-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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