Instruction Manual

Trident Model PD765 Universal Input Meter Instruction Manual
40
Relay and Alarm Operation
The following graphs illustrate the operation of the relays, status LEDs,
and ACK button.
High Alarm Operation (Set > Reset)
Relay
LED
Input
de-energized
energized
off
on
Relay
LED
A
utomatic or Manual (non-latching)
ACK
pressed
Relay
LED
Manual (latching)
ACK
pressed
Relay
LED
Manual only after passing below Reset (latching with clear)
ACK
pressed
Set
Reset
Automatic (non-latching)
For Manual reset mode, ACK can be pressed anytime to turn "off" relay.
For relay to turn back "on", signal must go below set point, and then go
above it.