Precision Digital PD865 - Manual (Page 45)

PD865 Snooper Modbus Serial Input Meter Instruction Manual
45
High Alarm with Fail-Safe Operation (Set > Reset)
Relay
LED
Input
Automatic (non-latching)
energized
de-energized
off
on
Relay
LED
Automatic or Manual (non-latching)
ACK
pressed
Relay
LED
Manual (latching)
ACK
pressed
Relay
LED
Manual only after passing below Reset (latching)
ACK
pressed
Set
Reset
Fail-safe operation: relay coil is energized in non-alarm condition. In case of
power failure, relay will go to alarm state.