When failure is not an option:
40 A Redundancy Module

Data sheet

SLR01• Easy set-up of N+1 redundancies on
the DIN-Rail• Decoupling diode• Ready relay contact• For use with 24...28V power supplies
up to max. 50A

Short description
When failures might cause costly extensive downtimes, a design solution is a redundant power supply that uses several (N+1) identical power
supplies.
The redundancy module SLR01 is designed to create an N+1 redundancy
in combination with the PULS power supply SL40 or other 24...28V power supplies with an output current of up to 40A (max. 50A). One SLR01
is required for each power supply. The module decouples the output of
the connected power supply from the others so that in the event offailure one power supply unit cannot overload the other units. A relaychangeover contact, picked up under normal conditions and dropped in
the event of failure, indicates the status of the connected power supplyunit.
A Dual Redundancy Module, SLR02, is available to provide redundancy
with two attached power supply units, each with an output current ofup to 30A (max. 35A). For smaller current values of 2.5A, 5A and 10A
PULS also offers the SLR2, SLR5 and SLR10 power supplies with integrated redundancy modules.

Decoupling part

Relay contacts

Voltage• nominal value• max. rated

Relay type
24 V DC
35 V, short-term 45 V

Voltage drop
Vin → Vout

typ. 0.6 V

Current per in- and output• nominal value
40 A• max. rated
50 A

Changeover contact, picked-up during normaloperation• relay picks up („ok“) when Vin between Vlow and Vhighwhen Vin < Vlow or Vin > Vhigh• relay drops out
Upper limit Vhigh• hysteresis

30 V ± 5% fix
appr. 0.7 Vadjustable
OK16...27 V
22.0 V
22 V ± 1%
Not OK
21.3 V
appr. 0.7 V
typ. 50 ms at undervoltage

Not OK

30.7 V
30.0 V

Hysteresis
drops out
picks upProtection against
polarity reversal

yes

Lower limit Vlow
• guaranteed range• preset• hysteresis• relay delay

Connection• Connector size
range

via stable screw terminals
solid: 0.5 - 16 mm2
flexible: 0.5-10 mm2

Contact load

48 V DC / 1 A or 230 V AC / 0.5 A

Note: The GND connector on the module exclusively serves as intrinsic
power supply

Connection• connector size
range

via stable screw terminals
solid: 0.5 - 6 mm2
flexible: 0.5-4 mm2Construction/ Mechanics*

LEDs on the front panel• for input
green LED, when Vin between Vlow and Vhigh• for output
green LED, when Vout > appr. 2.5...3.5 V

Housing dimensions and Weight
48 mm x 124 mm x 117 mm (+ DIN Rail)• WxHxD
above/below 10 mm recommended• Free spaceleft/right 10 mm recommended
for ventilation
646 g• Weight
Design advantages:• All connection blocks are easy to reach as mounted at the frontpanel*For further information see data sheets „The SilverLine“, „SilverLine
Family Branches“

picks updrops out

Note:
• All relay contacts are potential-free

Further information
Test voltage• relay cont., Vin, Vout 3 kV
2.5 kV• relay contacts/PE
500 V AC• Vin, Vout/PE
Ambient temperature
range Tamb

Operation: -10°C...+70°C
Storage: -25°C...+85°C

Efficiency> 97 %

Order information

slr01e / 030521

Order numberDescription

SLR01
SLZ01

40A Redundancy Modul(Screw mounting set, two needed per unit)
1/2

SLR01

Data sheet
Power wiring SLR01

Bottom view SLR01
GND+24VPESLR01
VinVout
GN
De.g. SL40+ – –PE

SLR01
VinVout
GN
De.g. SL40+ – –Side view SLR01

Front view SLR01

117

Further information, especially about EMC, Connections, Safety, Approvals, Mechanics and Mounting,see page 2 of „The SilverLine“ data sheet.
Unless otherwise stated, specifications are valid for AC 230V input voltage, +25°C ambient temperature, and 5 min. run-in time. They are subject to change without prior notice.

Your partner in power supply:

EuropeanPower Supply
Manufacturers
AssociationBayerns Best 50
Czech 100 Best
Europe’s 500

PULS GmbH
Arabellastraße 15D-81925 München
Tel.: +49 89 9278-0
Fax: +49 89 9278-199
www.puls-power.com

2/2

slr01e / 030521