PN 9000-280-VE, Rev B
Alarm Contact Connections
This section describes how to make wiring connections for any alarm devices
you wish to connect to the control unit.
Standard Alarm Connections
The WDG-V UOP analyzer 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 active. 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 represen-
tative of the process. When this alarm is active, concentration readings may
not be representative of the process and should not be used for control/
safety. Examples of this alarm include:
Warm-Up
mode,
Calibration
mode,
and
Diagnostic
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.
•
Flow Alarm
For WDG-V UOP analyzers, Relay 5 (ALM 3) is reserved for the Flow Alarm.
It can be configured as
Energize on Alarm
or
De-energize on Alarm
from
the
Alarm Configuration
menu. It triggers when the flow temperature
reading falls 100 °C below the normal process temperature.
2-24 | Thermox
®
WDG-V UOP ATEX-IECEx Analyzer
