MAC155 Rev. 12 ©Copyright MAC Instruments 2005. All Rights Reserved.
Pg 70
ALARM OUTPUT
If the probe generates a “General Alarm” Alarm a dry relay contact will close and the
RED “General Alarm” LED will illuminate confirming the activation of the relay. This
relay output will be active any time the Local Alarm Relay is active. The exception to
this is if there is a loss of communications between the PLC interface and the MAC155
Controller.
RUN OUTPUT
This output is active when the probe is operating normally. Any alarm conditions or
maintenance activities will deactivate this output.
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