Yokogawa Button Operated MV2000 - Manual (Page 55)

1-48 M-4660
1.10 FAIL/Status Output Function (/F1 Option)
FAIL Output
When a failure occurs in the MV CPU, the MV outputs a relay contact signal (1 signal).
The relay is energized when the CPU is normal and de-energizes when a CPU failure
occurs. Therefore, relay output is carried out when the power is turned OFF (or when
there is a power failure). You cannot change this behavior.
Relay Operation
NO C NC
During normal operation
NO C NC
When a failure occurs
NO C NC
When power is turned OFF
* NO: Normally Opened, C: Common, NC: Normally Closed
If a failure occurs, contact your nearest Omega dealer for repairs.