Precision Digital PD6000 - Manual (Page 47)

Model PD6000 Analog Input Process Meter Instruction Manual
47
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
de-energized
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
Automatic (non-latching)
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.