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SITRANS RD300
A5E31917845
SITRANS RD300 – OPERATING INSTRUCTIONS
Page 47
Signal Loss or Loop Break Relay Operation
The following graph shows the loop break 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 (Process 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