Puls Y User Manual

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

MOSFET REDUNDANCY MODULE

 Single Input with Single Output
 Equipped with Plug-connector for “Hot Swapping”
 Suitable for all DIMENSION Power Supplies

Except QT40 Series

 Only 150mV Voltage Drop at 40A
 Only 6.2W at 40A
 160% (65A) Peak Load Capability
 Reverse Input Polarity Protection
 Full Power Between -40°C and +60°C
 Width only 46mm
 Rugged Metal Housing
 Easy Wiring:

Distribution Terminal for Negative Pole Included

 3 Year Warranty

1/18

GENERAL DESCRIPTION

The YR40.245 is a redundancy module, which can be
used to build redundant systems. The module has one
input and one output and can carry nominal currents up
to 40A. The output is equipped with a plug-connector,
which allows replacing the power supply or the
redundancy module while the system is running (hot­swapping)

The novelty of this redundancy module is the utilization
of mosfets instead of diodes for the decoupling of the
two input channels. This reduces the heat generation
and the voltage drop between input and output. The
redundancy module does not require an additional
auxiliary voltage.

Due to the low power losses, the unit is very slender and
only requires 46mm width on the DIN-rail. Large
connection terminals allow for a safe and fast
installation. The large international approval package
makes this unit suitable for nearly every application.

SHORT-FORM DATA

Input voltage DC 12-28V ±30%
Input voltage
range

8.4-36.4Vdc

Input current 0-40A continuous
40-65A for 5 seconds
Output current 0-40A continuous
40-65A for 5 seconds

max. 22A

in overload

*)

or

short circuit mode

Input to output
voltage drop

typ. 80mV
typ. 150mV

at 20A

at 40A
Power losses typ. 120mW at no load
typ. 1.8W at 24V, 20A
typ. 6.2W at 24V, 40A
Temperature range -40°C to +70°C operational
Derating 1A/°C +60 to +70°C
Dimensions *)

46x124x127mm WxHxD

Weight 340g, 0.75lb

*) Currents at voltages below 6V
**) Plus height for plug connector

ORDER NUMBERS

Redundancy YR40.245 12-28V Standard unit
Module

Accessory ZM2.WALL Wall/ panel mount
bracket
ZM12.SIDE Side mount bracket

MARKINGS

IND. CONT. E

Q.

UL 508, pending

UL 60950-1,

pending

Class I Div 2,

pending

IECEx ATEX

II 3G Ex nA IIC T4 Gc

pending

Marine, pending

EMC, LVD

Oct. 2013 / Rev. 1.0 DS-YR40.245-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 [phone] Germany

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

INDEX

Page Page

1.

Intended Use .......................................................3

2. Installation Requirements...................................3

3. Input and Output Characteristics .......................4

4. Power Losses........................................................5

5. Lifetime Expectancy and MTBF...........................6

6. Terminals and Wiring..........................................7

7. Replacing Units while the System is Running....8

8. Functional Diagram.............................................9

9. Front Side and User Elements.............................9

10. EMC....................................................................10

11. Environment ......................................................11

12. Protection Features ...........................................12

13. Safety Features ..................................................12

14. Dielectric Strength............................................ 12

15. Approvals.......................................................... 13

16. Fulfilled Standards............................................ 13

17. Physical Dimensions and Weight ..................... 14

18. Accessories ........................................................ 15

19. Application Notes............................................. 16

19.1. Recommendations for Redundancy.........16

19.2. Inductive and Capacitive Loads................16

19.3. Sidewards Installation Clearances............16

19.4. 1+1 Redundancy up to 40A...................... 17

19.5. N+1 Redundancy, Example with 120A ....17

19.6. Mounting Orientations ............................18

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 ABREVIATIONS

PE and symbol PE 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 24V 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)

24Vdc A figure with the unit (Vdc) at the end is a momentary figure without any additional

tolerances included.

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

shall A key word indicating a mandatory requirement

should A key word indicating 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 each
other by utilizing diodes or other switching arrangements. E.g. two 10A power supplies are
needed to achieve a 10A redundant
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 switching
arrangements.
E.g.: To achieve a 30A redundant
system, four 10A power supplies are
needed in a N+1 redundant system.

N+1

Redundancy

1+1

Redundancy

ACDCAC

DC

Load

+

-

IN

OUTINOUT

AC

DC

IN

OUTINOUT

AC

DC

ACDCAC

DC

Load

+

-

IN

OUTINOUT

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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2/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

1. INTENDED USE

This redundancy module is designed for installation in an enclosure and is intended for the general use such as in
industrial control, office, communication, and instrumentation equipment.

This redundancy module can be used with any DIMENSION power supplies except the QT40 series.
Do not use this redundancy module in equipment, where malfunction may cause severe personal injury or threaten

human life.
This device is designed for use in hazardous, non-hazardous, ordinary or unclassified locations.

2. INSTALLATION REQUIREMENTS

This device may only be installed and put into operation by qualified personnel.
This device does not contain serviceable parts.
If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to

the factory for inspection.
Mount the unit on a DIN-rail so that the input terminals are located on the bottom and the output terminals on the

top of the unit. For other mounting orientations see de-rating requirements of chapter 19.6 in this document.
This device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do

not cover the ventilation grid (e.g. cable conduits) by more than 30%!
Keep the following installation clearances:

40mm on top,
20mm on the bottom,
5mm on the left and right sides are recommended when the device is loaded permanently with more than 50% of the
rated output current. Increase the side clearance to 15mm in case the adjacent device is a heat source (e.g. another
power supply). See chapter 19.3 for other allowed clearances when used with the PULS DIMENSION series in a 1+1
redundant configuration.

WARNING

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

- Turn power off before working on the device. Protect against inadvertent re-powering.

- Make sure that the wiring is correct by following all local and national codes.

- Do not open, modify or repair the unit.

- Use caution to prevent any foreign objects from entering 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 surfaces may cause burns.

Notes for use in hazardous location areas:

The redundancy module 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 and is evaluated according to EN 60079-0:2009 and EN 60079-15:2010.

WARNING EXPLOSION HAZARDS!

Substitution of components may impair suitability for this environment. Do not disconnect the unit 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 the
requirements of the EN 60079-15:2010.

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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3/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

3. INPUT AND OUTPUT CHARACTERISTICS

Number of inputs - 1
Number of outputs - 1
Input voltage nom. DC 12-28V ±30% The input circuitry must meet the SELV requirements

stipulated by IEC/EN/UL 60950-1.
Input voltage range - 8.4-36.4Vdc
Voltage drop, input to output typ. 80mV at 20A, see Fig. 3-1
typ. 150mV at 40A, see Fig. 3-1
Input current nom. 0-40A continuous
nom. 40-65A for 5 seconds
max

22A

in overload (voltage < 6V) or short circuit mode
Peak input current max. 1500A for max. 1ms per input
Output current nom. 40A continuous
nom. 40-65A for 5 seconds
max.

22A

in overload (voltage < 6V) or short circuit mode
Reverse current max. 1mA at 24V, per input, -40°C to +70°C
Reverse voltage max. 40Vdc voltage applied to the output, continuously allowed
Output capacitance typ. 320μF

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)

Voltage Drop, typ

0mV

10A 30A

25mV

50mV

75mV

100mV

125mV

150mV

40A20A

A

.

.

.

2

5

°

C

B

.

.

.

6

0

°

C

Output Current

0

175mV

200mV

A

B

V

A

QS40

24V,40A

+

-

I

IN

U

IN

Voltage Drop

UIN=

U

OUT

-

Output

A

V

I

OUT

U

OUT

Variable

Load,
0-40A

YR40.245

Input Output

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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4/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

4. POWER LOSSES

DC 12V DC 24V

Power losses typ.

1.7W 1.8W at 20A

typ.

6.1W 6.2W

at 40A

Standby power losses typ. 0.06W 0.12W at no output current

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

Power Losses, typ.

0

0510 30

1

4

5

8W

40

A

2515 20 35

Output Current

A

2

6

B

7

A

.

.

.

2

4

V

,

2

5

°

C

B

.

.

.

2

4

V

,

6

0

°

C

3

V

A

QS40

set to
24V

+

-

I

IN

U

IN

Output

A

V

I

OUT

U

OUT

Variable

Load,

0-40A

YR40.245

Input Output

Losses

UIN=

U

OUT

-*IIN)(

*

I

OUT

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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5/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

5. LIFETIME EXPECTANCY AND MTBF

Load conditions

Output: 20A Output: 40A

Lifetime expectancy

*)

557 000h

*)

134 000h

*)

at 24V and 40°C

1 576 000h

*)

378 000h

*)

at 24V and 25°C

MTBF

**)

SN 29500, IEC 61709 13 290 000h 6 357 000h at 24V 40°C
22 628 000h 12 238 000h at 24V 25°C
MTBF

**)

MIL HDBK 217F 381 000h 278 000h Ground Fixed GF40 (24V and 40°C)
518 000h 366 000h Ground Fixed GF25 (24V and 25°C)
1 816 000h 1 401 000h Ground Benign GB40 (24V and 40°C)
2 486 000h 1 861 000h 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 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 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 that

statistically 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.

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

6. TERMINALS AND WIRING

Input Output

Type Screw termination

IP20 Finger safe construction.
Suitable for field installation.

Pluggable screw termination
IP20 Finger safe construction.

Suitable for field installation.
Solid wire 0.5-16mm2 0.2-16mm2
Stranded wire 0.5-10mm

2

0.5-10mm2
American Wire Gauge 22-8 AWG 22-6 AWG
Max. wire diameter 5.2mm (including ferrule) 5.4mm (including ferrule)
Wire stripping length 12mm / 0.5inch 12mm / 0.5inch
Screwdriver 3.5x1mm slotted or Pozidrive No 2 5.5x1mm slotted or Pozidrive No 2
Recommended tightening torque 1.2Nm, 10.6lb-in 1.4Nm, 12lb-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).

Instructions for inserting and removing the pluggable output terminal

To avoid an accidental disconnection of the output, the plug connector is equipped with a locking system.

Fig. 6-1 Removing the latch mechanism

A

Unlock the red sliders by pushing the tabs down

B

At the same time slide the tabs back

C Pull-out to unplug the connector

To insert the plug connector, reverse the procedure

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

7. REPLACING UNITS WHILE THE SYSTEM IS RUNNING

Fig. 7-1 Replacing the power supply or redundancy module while the system is running

L N PE

Power Supply

+ +

- -

DC 24V

Load

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

I I

L
N

PE

L N PE

Power Supply

+ +

- -

DC 24V

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

1

2

3a

3b

4

Instructions:

- Switch-off circuit breaker (3a).

- Remove plug (4). The plug prevents the cables from shorting.

- Change power supply (1) or/ and redundancy module (2).

- Put the plug (4) back in.

- Turn-on the circuit breaker (3a).

- The circuit is redundant again.

To replace the right power supply or redundancy module, use the same procedure but turn off circuit breaker (3b).

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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8/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

8. FUNCTIONAL DIAGRAM

Fig. 8-1 Functional diagram

+

-

+

-

Input

control

Chassis
Ground

Output

9. FRONT SIDE AND USER ELEMENTS

Fig. 9-1 Front side

A

Output Terminals (pluggable 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 (screw terminals)

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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9/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

10. EMC

The redundancy module 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.

EMC Immunity

According generic standards: EN 61000-6-1 and EN 61000-6-2

Electrostatic discharge EN 61000-4-2 Contact discharge

Air discharge

8kV
15kV

Criterion A

Criterion A
Electromagnetic RF field EN 61000-4-3 80MHz-2.7GHz 20V/m Criterion A
Fast transients (Burst) EN 61000-4-4 Input lines

Output lines

2kV
2kV

Criterion A

Criterion A
Surge voltage on input

lines

EN 61000-4-5 + Æ -

+/- Æ Chassis ground

500V
1kV

Criterion A

Criterion A

Surge voltage on output
lines

EN 61000-4-5 + Æ -

+/- Æ Chassis ground

500V
1kV

Criterion A

Criterion A

Conducted disturbance EN 61000-4-6 0.15-80MHz 20V Criterion A
Power-frequency magnetic

field *)

EN 61000-4-8 50Hz 30A/m Criterion A

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. hall

elements, electrodynamic microphones, etc.

EMC Emission

According generic standards: EN 61000-6-3 and EN 61000-6-4

Conducted emission IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 limits for DC power ports according

EN 61000-6-3 fulfilled *)
Radiated emission EN 55011, EN 55022 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) this
device must accept any interference received, including interference that may cause undesired operation.

*) 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 varies from 140kHz to 500kHz depending on the input voltage.

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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10/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

11. ENVIRONMENT

Operational temperature

*)

-40°C to +70°C (-40°F to 158°F)
Storage temperature -40 to +85°C (-40°F to 185°F) for storage and transportation
Output de-rating 1A / °C 60-70°C (140°F to 158°F)
Humidity

**)

5 to 95% r.H. IEC 60068-2-30

Vibration sinusoidal 2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g

2 hours / axis

IEC 60068-2-6

Shock 30g 6ms, 20g 11ms

3 bumps / direction, 18 bumps in total

IEC 60068-2-27

Altitude 0 to 2000m (0 to 6 560ft) without any restrictions
2000 to 6000m (6 560 to 20 000ft) reduce output power or ambient temperature,

see Fig. 11-2
Altitude de-rating 2.5A/1000m or 5°C/1000m > 2000m (6500ft), see Fig. 11-2
Over-voltage category not applicable The concept of the overvoltage category is

used for equipment energized directly from

the low voltage mains (IEC 60664-1 §4.3.3.2.1).
Degree of pollution 2 IEC 62103, EN 50178, not conductive
LABS compatibility The unit does not release any silicone or other LABS-critical substances and is suitable for

use in paint shops.

*) 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

Fig. 11-1 Output current vs. ambient temp. Fig. 11-2 Output current vs. altitude

Allowed Output Current

0

0 2000 4000

6000m

10

20

30

40

50

65A

n

o

r

m

a

l

m

o

d

e

Altitude

s

h

o

r

t

t

e

r

m

(

<

5

s

)

A

.

.

.

T

a

m

b

<

7

0

°

C

B

.

.

.

T

a

m

b

<

6

0

°

C

C

.

.

.

T

a

m

b

<

5

0

°

C

A

B

C

Allowed Output Current

0

-40 0 20 40

70°C

10

20

30

40

50

65A

60-25

n

o

r

m

a

l

m

o

d

e

s

h

o

r

t

t

e

r

m

(

<

5

s

)

Ambient Temperature

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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11/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

12. PROTECTION FEATURES

Output over-current protection not included
Reverse input polarity

protection

included unit does not start when input voltage is reversed

Degree of protection IP 20 EN/IEC 60529
Penetration protection > 3.6mm e.g. screws, small parts
Over-temperature protection not included
Input transient protection not included
Output transient protection included see EMC section
Internal input fuse not included

13. SAFETY FEATURES

Input / output separation no galvanic separation Mosfet between input and output
Class of protection III PE (Protective Earth) or chassis connection not required
PE resistance < 0.1Ohm between housing and chassis-ground terminal

14. 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 the
appropriate 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.

Fig. 14-1 Dielectric strength

A

Type test 60s 500Vac

Factory test 5s 500Vac

12/18

Field test 5s 500Vac

Cut-off current setting > 2mA

A

Chassis

In- / Output

-

+

Oct. 2013 / Rev. 1.0 DS-YR40.245-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 [phone] Germany

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

15. APPROVALS

EC Declaration of Conformity

The CE mark indicates conformance with the

- EMC directive 2004/108/EC,

- Low-voltage directive (LVD) 2006/95/EC and

- RoHS directive 2011/65/EU.
The CE mark indicates conformance with the

- ATEX directive 94/9/EC (Equipment and protection systems
intended for use in potentially explosive atmospheres)

CB Scheme,
Information Technology Equipment

IEC 60950-1, pending

UL 508, pending

IND. CONT. EQ.

Listed for use as Industrial Control Equipment;
U.S.A. (UL 508) and Canada (C22.2 No. 107-1-01);
E-File: E198865

UL 60950-1, pending

Recognized for use as Information Technology Equipment,
Level 5; U.S.A. (UL 60950-1) and Canada (C22.2 No. 60950);
E-File: E137006

ANSI / ISA 12.12.01-2007
(Class I Div 2) , pending

LISTED for use in Hazardous Location Class I Div 2 T4 Groups
A,B,C,D systems; U.S.A. (ANSI / ISA 12.12.01-2007) and Canada
(C22.2 No. 213-M1987)

Suitable for use in Class 1 Zone 2 Groups IIa, IIb and IIc
locations. Number of ATEX certificate: EPS 13 ATEX y yyy X
The redundancy module must be built-in in an IP54 enclosure.

EN 60079-0, EN 60079-15
ATEX, pending

II 3G Ex nA IIC T4 Gc

Suitable for use in Class 1 Zone 2 Groups IIa, IIb and IIc
locations. Number of IECEx certificate: IECEx EPS 13.yyyyX

IEC 60079-0, IEC 60079-15,
pending

IECEx

Marine, pending

GL (Germanischer Lloyd) classified
Environmental category: C, EMC1
Marine and offshore applications

16. FULFILLED STANDARDS

EN/IEC 60204-1

Safety of Electrical Equipment of Machines
EN/IEC 61131-2 Programmable Controllers
EN 50178, IEC 62103 Electronic Equipment in Power Installations

Oct. 2013 / Rev. 1.0 DS-YR40.245-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 [phone] Germany

13/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

17. PHYSICAL DIMENSIONS AND WEIGHT

Weight 340g / 0.75lb
DIN-Rail Use 35mm DIN-rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.

The DIN-rail height must be added to the unit depth (127mm) to calculate the total required
installation depth.

Installation clearances See chapter 2

Fig. 17-1 Front view Fig. 17-2 Side view

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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14/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

18. ACCESSORIES

ZM2.WALL Wall mounting bracket
This standard bracket is used to mount the YR40.245 redundancy module onto a flat surface without utilizing a DIN-

Rail.

Fig. 18-1 ZM2.WALL Wall mounting bracket Fig. 18-2 Assembled wall mounting bracket

ZM12.SIDE Side mounting bracket

This bracket is used to mount the YR40.245 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 can

be mounted.
For sideway DIN-rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on

the steel bracket.

Fig. 18-3

ZM12.SIDE Side mounting bracket

Fig. 18-4

Side mounting with DIN-rail brackets

Oct. 2013 / Rev. 1.0 DS-YR40.245-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 [phone] Germany

15/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

19. APPLICATION NOTES

19.1. 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.

19.2. INDUCTIVE AND CAPACITIVE LOADS

The unit is designed to supply any kind of loads, including unlimited capacitive and inductive loads.

19.3. SIDEWARDS 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 the

left and right sides when the device is loaded permanently with more than 50% of the rated power. Increase this
clearance 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:

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

max.

40A

Load

0mm 0mm 0mm

- 1+1 redundancy application with maximum

40A output current.

- The power supplies are from the PULS

DIMENSION series.

- The redundancy module is placed between

the two power supplies or at least on one
side of the power supply.

- The output voltage is set to the same level

on both power supplies.

Oct. 2013 / Rev. 1.0 DS-YR40.245-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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16/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

19.4. 1+1 REDUNDANCY UP TO 40A

1+1 Redundancy up to 40A requires two 40A power supplies and two YR40.245 redundancy modules.

Fig. 19-1 Wiring diagram, 1+1 Redundancy, 40A output current

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

L

N

PE

I

I

24V
40A

Load

Failure

Monitor

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

19.5. N+1 REDUNDANCY, EXAMPLE WITH 120A

N+1 Redundancy up to 120A requires four 40A power supplies and four YR40.245 redundancy modules.

Fig. 19-2 Wiring diagram, n+1 Redundancy, 120A output current

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

L
N

PE

I

I

Failure

Monitor

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

L N PE

+ +

- -

24V, 40A

Parallel Use

Single Use

DC­OK

Power Supply

AC Input

YR40.245

Redundancy

Module

+

-

Input

Output

+

-

24V
120A
Load

I I

+

-

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

Oct. 2013 / Rev. 1.0 DS-YR40.245-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 [phone] Germany

17/18

YR40.245

Y-Series

12-28V, 40A, SINGLE REDUNDANCY MODULE

Oct. 2013 / Rev. 1.0 DS-YR40.245-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 [phone] Germany

19.6. MOUNTING ORIENTATIONS

Mounting orientations other than input terminals on the bottom and output on the top 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. 19-3
Mounting
Orientation A

(Standard
orientation)

YR40.245

Redundancy

Module

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

10

20

30

40A

50

A

1

Ambient Temperature

Fig. 19-4
Mounting
Orientation B

(Upside down)

YR40.245

Redundancy

Module

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

10

20

30

40A

50

A

1

Ambient Temperature

Fig. 19-5
Mounting
Orientation C

(Table-top
mounting)

Output Current

0

10 20 30 40

60°C

10

30

40A

50

20

A

1

A

2

Ambient Temperature

Fig. 19-6
Mounting
Orientation D

(Horizontal cw)

YR40.245

Redundancy

Module

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

10

30

40A

50

20

A

1

A

2

Ambient Temperature

Fig. 19-7
Mounting
Orientation E

(Horizontal ccw)

YR40.245

Redundancy

Module

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

10

30

40A

50

20

A

1

A

2

Ambient Temperature

18/18