Datasheet
1Description
SIL coupling relay
PSR-PS21
© PHOENIX CONTACT
Data sheet
Intended Use
The PSR-PS21 SIL coupling relay can be used for power
adaptation and electrical isolation in high and low-demand
applications up to SIL2 according to IEC61508 as well as
EN61511.
Using this module, circuits are interrupted in a safety-ori-
ented manner.
The category 3 device is designed for installation in zone 2
potentially explosive areas.
The safety relay is equipped with an enabling current path
and a confirmation current path that drop out without delay
according to stop category0 in accordance with EN60204-
1.
By filtering the controller test pulses, premature failure of the
safety relays is prevented.
If an error occurs inside the module, the internal device input
impedance is affected. As such with compatible, safe sys-
tems, the test pulses sent from the controller may be dis-
rupted and the error can be reported back to the corre-
sponding digital output without any additional wiring effort.
Features
–SIL2 coupling relay for safety-related switching off
– Can be used in high and low-demand applications
– Approved for Class I, Zone 2 applications
– Easy proof test:
-Active error acknowledgment via A1
-Visually on the device
-Evaluation of the force-guided N/C contact
– Integrated DCS test pulse filter
– Low inrush current
– 1 undelayed enabling current path
– 1 undelayed confirmation current path
– 1 digital signal output
– Fixed screw connection
–6.8mm housing width
– Controller-specific Termination Carrier available on re-
quest
WARNING: Risk of electric shock
Observe the safety instructions in the corresponding section!
Make sure you always use the latest documentation.
It can be downloaded from the product at phoenixcontact.net/products.
This data sheet is valid for all products listed on the following pages.
106253_en_00
2015-03-13