Precision Digital PD6400 - Manual (Page 54)

Model PD6400 High Voltage & Current Meter Instruction Manual
54
Signal Loss or Loop Break Relay Operation
The following graph shows the loop break relay operation for a high
alarm relay.
When the meter detects a break in the 4-20 mA loop, the relay will go to
one of the following selected actions:
1. Turn On (Go to alarm condition)
2. Turn Off (Go to non-alarm condition)
3. Ignore (Processed as a low signal condition)
Relay
LED
Input
Loop Break = Ignore
de-energized energized
off on
Relay
LED
Loop Break = Off
Relay
LED
Loop Break = On
Set
Reset