Pilz PSEN op4H-s-30-150/1 - Manual (Page 33)

Instruction Manual PSEN op4F/H-s Series
29
You may use for example a safety relay of the PNOZsigma (PNOZ
s4, PNOZ s5) range as an evaluation device.
The wiring is described in the operating manual of the PNOZsigma
unit.
•
Do not use varistors, RC circuits or LEDs in parallel at relay inputs
or in series at OSSD outputs.
•
The OSSD1 and OSSD2 safety contacts cannot be connected in
series or in parallel, but can be used separately (Fig.17),
conforming to the plant’s safety requirements.
If one of these configurations is erroneously used, the device enters
into the output failure condition (see section 7 “Diagnostic functions”).