Installation Guide | 3-25
Alarm Contact Connections
This section describes how to make wiring connections for any alarm de-
vices you want to connect to the control unit.
Standard Alarm Connections
The WDG-V sensor provides five sets of normally open alarm contacts as
follows:
Terminal Block ID Description
SVC - Service Alarm
DV - Data Valid Alarm
ALM1 - Process Alarm 1 (Configurable)
ALM2 - Process Alarm 2 (Configurable)
ALM3 - Process Alarm 3 (Configurable)
The process alarms are referenced as Relay 3, Relay 4 and Relay 5 in the
AMEVision.
Relay 3 - ALM 1
Relay 4 - ALM 2
Relay 5 - ALM 3
Service Alarm - The service alarm indicates that a critical alarm exists and
the analyzer needs repair. Readings are not valid when this alarm is ac-
tive. The relay contacts are normally-open and are OPEN (de-energized)
when a critical alarm exists.
Data Valid - The data valid alarm indicates if the concentration readings
are representative of the process. When this alarm is active, concentra-
tion readings may not be representative of the process and should not be
used for control/safety. Examples of this alarm include: Warm-up mode,
in calibration, and diagnostics mode. This alarm differs from the service
alarm in that there is not necessarily a problem with the analyzer when
this alarm is active. The relay contacts are normally-open and are OPEN
(de-energized) when the concentration readings are not valid.
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