P74x/EN PL/N
1, P742, P743
(PL) 7-
Relay
English Text Type Source Description
Command
Allows binary signals that are mapped to virtual
inputs to interface into PSL
Allows user to control a binary signal which can
be mapped via SCADA protocol output to other
Allows user to control a binary signal which can
be mapped via SCADA protocol output to other
1.8 Description of P742 logic nodes
1.8.1 Sorted by DDB number
Relay
English Text Type Source Description
Output Relay 01 - All trips (FSL) but not retrip
Output Relay 02 - All trips (FSL) but not retrip
Output Relay 03 - All trips (FSL) but not retrip
89-B (Isolator open) Auxiliary Input (3 phase) of
the isolator 1
89-A (Isolator closed) Auxiliary Input (3 phase)
of the isolator 1
89-B (Isolator open) Auxiliary Input (3 phase) of
the isolator 6
89-A (Isolator closed) Auxiliary Input (3 phase)
of the isolator 6
Signal
protection)
Allows external protection to initiate breaker fail
Signal
protection)
Allows external protection to initiate breaker fail
Signal
protection)
Allows external protection to initiate breaker fail
Signal
protection)
Allows external protection to initiate breaker fail
Manual/operator Circuit Breaker trip command
Circuit Breaker is not available to trip
PSL (50BF Backtrip
protection)
50BF Backtrip order from an other protection
52-A (CB closed) CB Auxiliary Input (3 phase)
52-B (CB open) CB Auxiliary Input (3 phase)
52-A (CB closed) CB Auxiliary Input (phase A)
52-B (CB open) CB Auxiliary Input (Phase A)
52-A (CB closed) CB Auxiliary Input (phase B)
52-B (CB open) CB Auxiliary Input (Phase B)
52-A (CB closed) CB Auxiliary Input (phase C)
52-B (CB open) CB Auxiliary Input (Phase C)