PSR-CT
PHOENIX CONTACT
108366_en_01
9
Application examples
9.1
Application information
Each of the presented application examples shows only one section that is relevant for the
wiring of the PSR-CT safety switch.
The user carries out the complete integration in the overall system and the safety classifica-
tion of the overall safety function.
Information on switch chains
–
Connect a
maximum of 30
PSR-CT safety switches in series.
–
The safety outputs are permanently assigned to the respective safety inputs of the sub-
sequent switch: FO1A to FI1A and FO1B to FI1B. If the connections are mixed up, the
switch changes to the error state.
–
If a reset function is executed on the switching device to be evaluated, you can reset
the safety function centrally. Operate the individual switches with autostart behavior.
Information regarding operation on safe controllers
For operating PSR-CT safety switches on safe controllers, observe the following notes and
requirements:
–
Use a common power supply for the controller and the connected safety switch.
–
Do
not
use a clocked power supply for the safety switch.
–
Tap the supply voltage directly from the power supply unit.
–
When connecting the supply voltage to a terminal of a safe controller, this output must
supply sufficient power.
–
Always connect safety inputs FI1A and FI1B directly to a power supply unit or to safety
outputs FO1A and FO1B of another safety switch.
–
Do
not
use clocked signals at safety inputs FI1A and FI1B.
–
You can connect safety outputs FO1A and FO1B of a safety switch to the safe inputs of
a controller.
Requirements:
–
The input of the controller must be suitable for clocked safety signals (OSSD).
–
The controller must tolerate test pulses on the input signals (can usually be param-
eterized).
–
See Section “Interface types according to ZVEI classification” on page 62.
WARNING: Loss of safety function due to incorrect connection
In order to guarantee the safety function, observe the following points when connecting
the safety switch:
•
Always evaluate both safety outputs.
•
Do not use the signal outputs as the safety outputs.