Precision Digital PD6060 - Manual (Page 49)

Model PD6060 Dual-Input Process Meter Instruction Manual
49
Relay and Alarm Operation Diagrams
The following graphs illustrate the operation of the relays, status LEDs,
and ACK button.
High Alarm 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 with clear)
ACK
pressed
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.