Signal Loss Or Loop Break Relay Operation - Siemens SITRANS RD300 Operating Instructions Manual

SITRANS RD300

Signal Loss or Loop Break Relay Operation

The following graph shows the loop break operation for a high alarm
relay.
Set
Reset
de-energized
Relay
LED
Relay
LED
Relay
LED
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)
A5E31917845
Input
energized
off on
Loop Break = Ignore
SITRANS RD300 – OPERATING INSTRUCTIONS
Loop Break = Off
Loop Break = On
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