Despatch MIC1162 Hi-limit User Manual

Page 28

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LOGICAL COMBINATION OF ALARMS

Two alarms may be combined logically to create an AND/OR situation.
They may be configured for Reverse-acting or Direct-acting. Either Output
2 or Output 3 may be assigned as Logical Outputs.

Example:
Logical OR of Alarm 1 with Alarm 2
Direct-Acting

Reverse-Acting

AL1 OFF, AL2 OFF: Relay OFF

AL1 OFF, AL2 OFF: Relay ON

AL1 ON, AL2 OFF: Relay ON

AL1 ON, AL2 OFF: Relay OFF

AL1 OFF, AL2 ON: Relay ON

AL1 OFF, AL2 ON: Relay OFF

AL1 ON, AL2 ON: Relay ON

AL1 ON, AL2 ON: Relay OFF

Example:
Logical AND of Alarm 1 with Alarm 2
Direct-Acting