Pilz myPNOZ - Page 26

Diagnostics
Getting started Modular safety relay,myPNOZ
1005615-EN-02
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Module
LED
Function LED Meaning Remedy
Flashes
red
Output LED
flashes green
Error at the output
} Output LED flashes (or both LEDs
flash simultaneously)
– Feedback loop is not closed
when starting or attempting to
switch on
– Output is switched off, but there
is still voltage at the output
} Both LEDs flash alternately
– Total current at the semicon-
ductor outputs of an I/O module
too high
– Supply voltage at the semicon-
ductor output of an I/O module
too high
– Total current at the semicon-
ductor outputs of an I/O module
briefly very high
– Short circuit between two semi-
conductor outputs on a module
– Short circuit between semicon-
ductor output and GND
– Check wiring of feedback loop,
rectify error
– Check wiring of output for short
circuits, rectify error
– Keep within the permitted sup-
ply voltage range (see mod-
ule’s technical details)
– Rectify short circuit
– Rectify short circuit