Section 3: Operation ______________________________________________
Page 3-18
8197 Instruction Manual
3.2.8 Alarm
Outputs
The Alarm Outputs connector provides relay contact closures for Major and
Minor alarms. Relay contacts are rated at 2 Amps, 30 VDC. The mating 7-
position terminal block, shown in Figure 3-13, is furnished in the ancillary kit.
1
2
3
4
5
6
7
FIGURE 3-13 ALARM OUTPUTS TERMINAL BLOCK
A Major Alarm is asserted when any of the following Alarm conditions exist:
Frequency, Tracking Alarm 2, Tracking Alarm 3, CPU or the unit is placed in Test
Mode. During normal operation, the Major Alarm relay is energized. The
energized relay causes continuity between common contact, Pin 2, and the
normally open contact, Pin 3.
A Major Alarm or power failure de-activates the relay causing continuity between
common, Pin 2, and the normally closed contact, Pin 1.
A Minor Alarm is asserted when any of the following alarm conditions exist:
Output Fault, Adjust Oscillator, Tracking Alarm 1, Replace Battery, Low GPS
Quality, Antenna Problem, Frequency offset or the unit is placed in Test Mode
operation. During normal operation, the Minor Alarm relay is de-activated. This
causes continuity between common, Pin 5, and the normally closed contact,
Pin 6.
When a Minor Alarm is asserted the relay is activated causing continuity between
common, Pin 5, and the normally open contact, Pin 4.