TTC PCM30U - Alarm Signalling; Error Fast Summation (Channels 1+2) ERR Optic Relay; Error Electromechanical Relays for Channels 1 and 2, ERR1 (ERR2; Fig 6

PCM30U, PCM30U-OCH – User's, Operating and Maintenance Manual
E.2.9 Alarm signalling
E.2.9.1 Error fast summation (channels 1+2) ERR optic relay
Fault (no voltage) = optic relay output disconnected
Fig 6 Fault signalling by summation optic relay on the RO4 unit
E.2.9.2 Error electromechanical relays for channels 1 and 2, ERR1 (ERR2)
Error = relay contacts closed
(relay without excitation,
make/break contact closed)
Error = relay contacts opened
relay without excitation,
make/break contact open)
1
st
channel (XJ106 connected 2-3)
2
nd
channel (XJ206 connected 2-3)
1
st
channel (XJ106 connected 1-2)
2
nd
channel (XJ206 connected 1-2)
Contact status when the relay coil is not excited = Error
Fig 7 Schematic of ERR1, ERR2
Power Channel Modules E-41 446S037.914.14N00