3-30 | Thermox Series 2000 WDG-IV / IVC / IVCM
Alarm Contact Connections
This section describes how to make wiring connections for any alarm de-
vices you wish to connect to the control unit. Alarm contact information
is divided for standard alarms and alarms that are available only if you
have the combustibles card installed in your control unit.
Standard alarm connections
The Series 2000 control unit provides four sets of standard alarm contacts,
which are labeled as follows (see Figure 3-29):
ALARM 1A ALARM 2A ALARM 3A ALARM 4A
ALARM 1B ALARM 2B ALARM 3B ALARM 4B
The Watchdog Timer Alarm connections are labeled as follows on the con-
trol unit:
ALARM 1A
ALARM 1B
The watchdog alarm contacts are normally closed during system opera-
tions (deactivated). A watchdog event triggers these alarm contacts to an
open condition. If you have a watchdog event, and the system returns to
normal operations, then the watchdog alarm will reset. The system will
retain in memory the last time the watchdog condition occurred.
The Service Alarm connections are labeled as follows:
ALARM 2A
ALARM 2B
The service alarm contacts are normally closed during system operations
(deactivated). A service alarm event triggers these alarm contacts to an
open condition.
Oxygen Alarm connections are configurable in software to activate under a
variety of user defined conditions, and are labeled as follows:
ALARM 3A ALARM 4A
ALARM 3B ALARM 4B
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