ProtEX-MAX PD8-6060 Explosion-Proof Dual-Input Meter Instruction Manual
36
Relay and Alarm Operation Diagrams
The following graphs illustrate the operation of the relays, status LEDs, and ACK button.
High Alarm Operation (Set > Reset)
For Manual reset mode, ACK can be pressed anytime
to turn "off" relay. To detect a new alarm condition, the
signal must go below the set point, and then go above
it.
Low Alarm Operation (Set < Reset)
For Manual reset mode, ACK can be pressed anytime
to turn "off" relay. For relay to turn back "on", signal
must go above set point, and then go below it.
High Alarm with Fail-Safe Operation
(Set > Reset)
Note: Relay coil is energized in non-alarm condition.
In case of power failure, relay will go to alarm state.
Low Alarm with Fail-Safe Operation
(Set < Reset)
Note: Relay coil is energized in non-alarm condition.
In case of power failure, relay will go to alarm state.
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