PCD0
Electrical installation
Page 124
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SAIA-Burgess Controls Ltd.
(HB_PCD0 26 766_E2.DOC)
26/766 E2
Emergency stop circuit with disconnection of all expansion modules
If all modules are turned off the first module can also be used for control tasks. However, to initiate the
bus node the RESET key must be used to supply the first expansion module with power. If the bus
coupler or PLC stop fails an emergency stop is forced via output (1) because the output switches to
zero (preferred shut-off state must be set to zero).
1
Emergency stop output signal active (permanent signal)
The PLC can force an emergency stop via this output if necessary
2
Release emergency stop output signal (pulse signal)
3
Emergency stop input signal not triggered
Can be used to check the emergency stop status via the PLC.
4
Power supply feed at emergency stop for the first module (emergency stop can be bypassed with
RESET key).
5
Power supply feed (with disconnection via emergency stop) for all following modules.
6
Power supply for all expansion modules (with automatic circuit breaker).
7
Power supply for the bus coupler (with automatic circuit breaker).
