Alarm Contact Connections - Ametek Thermox CG1000 User Manual

-CG1000 voltage is normally about 28 volts. If the JP2 jumper is removed,
the external voltage source must be used to power the current output
circuits. The external voltage source must be no greater than 30 volts DC.
To determine the minimum external voltage supply required to power the
current outputs, use the following formula:
VEXTmin = .02 amps (RLoad + Rwires) + 4 volts
where:
VEXTmin = the minimum external voltage required to power current
output circuit
RLoad = the load resistance of the current output device
Rwires = the resistance of the wires

Alarm Contact Connections

This section describes how to make wiring connections for any alarm
devices you wish to connect to the CG1000. Information on how to set up
alarms in software is described in Chapter 4.
Connector J8 on the back of the CG1000 analyzer also contains alarm pin-
outs (see Figure 3-5):
The Watchdog Timer Alarm is associated with the following on J8:
See the "Watchdog "Relay" section in Chapter 4 for complete information
on the watchdog timer alarm. The watchdog alarm contacts are normally
closed during system operations (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 (see the "Exception Log" section in Chapter 4 for help
on how to view this information).
The Service Alarm is associated with the following on J8:
See the "Service Alarm" section in Chapter 4 for complete information on
what events trigger the transfer of the service alarm. The service alarm
contacts are normally closed during system operations (deactivated). A
service alarm event triggers these alarm contacts to an open condition.
ALARM 1A Pin 5
ALARM 1B Pin 6
ALARM 2A Pin 7
ALARM 2B Pin 8
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Installation 3-9