PNOZ p1p
Operating Manual PNOZ p1p
20674-EN-06
8
Function Description
The base unit PNOZ p1p controls the expansion modules of the modular safety system via
the PNOZpower bus and it is used in conjunction with the expansion modules for the
safety-related interruption of a safety circuit.
When the supply voltage is applied the "POWER" LED will light. The unit is ready for opera-
tion when the feedback loop Y1-Y2 and the start circuit S33-S34 are closed. The "START"
LED is lit.
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Input circuit is closed (e.g. E-STOP pushbutton not operated):
–
The LEDs "CH.1 IN" and "CH.2 IN" are lit.
–
At the expansion module control output connected to the PNOZpower bus there is a
high signal. The unit is active.
–
The "OUT" status display will illuminate.
–
The "START" LED goes out.
–
A high signal is present at the semiconductor output switch state Y32.
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Input circuit is opened (e.g. E-STOP pushbutton operated):
–
The LEDs "CH.1 IN" and "CH.2 IN" go out.
–
At the expansion module control output connected to the PNOZpower bus there is a
low signal.
–
The "OUT" status display will go out.
–
A low signal is present at the semiconductor output switch state Y32.
Semiconductor output supply voltage/fault Y35
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A high signal is present at semiconductor output Y35 if the supply voltage is present
and the internal fuse has not blown. If there is a fault on the PNOZ p1p or on an expan-
sion module, there is low signal at Y35.
NOTICE
When controlling an expansion module via the den PNOZpower bus the
switch-on delay/delay-on de-energisation of the controlling device (e.g base
unit, control module, ...) and the expansion module are added together.
Operating modes
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Single-channel operation: No redundancy in the input circuit, earth faults in the start
and input circuit are detected.
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Dual-channel operation with detection of shorts across contacts: Redundant input cir-
cuit, PNOZ p1p detects
–
earth faults in the start and input circuit,
–
short circuits in the input circuit,
–
shorts across contacts in the input circuit.
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Automatic start: Unit is active once the input circuit has been closed.
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Manual start: Unit is active once the input circuit and the start circuit are closed.
