Pilz PNOZ s4 C 48-240VACDC 3 n/o 1 n/c - Manual (Page 9)

PNOZ s4
Operating Manual PNOZ s4
21396-EN-12
9
Operation
The unit is ready for operation when the Power LED is permanently lit.
LEDs indicate the status and errors during operation:
LED on
LED flashes
Information
Status indicators and error indicators may occur independently. In the case
of an error display, the "Fault" LED will light or flash (exception: "Supply
voltage too low"). An LED that is also flashing indicates the potential cause
of the error. An LED that is lit and is static indicates a normal operating sta-
tus. Several status indicators and error indicators may occur simultaneously.
Status indicators
Power
Supply voltage is present.
In1
Input circuit at S12 is closed.
In2
Input circuit at S22 is closed.
Out
Safety contacts are closed and semiconductor output Y32 carries a high signal.
Reset
24 V DC is present at S34.
Error indicators
All LEDs off
Diagnostics: Short across contacts/earth fault; unit switched off
} Remedy: Rectify short across contacts/earth fault, switch off supply voltage
for 1 min.
Fault
Diagnostics: Plug terminator not connected
} Remedy: Insert plug terminator, switch supply voltage off and then on
again.