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Chapter 2: PTP 820G Hardware Description
External Alarms
PTP 820G includes a DB9 dry contact external alarms interface. The external alarms interface
supports five input alarms and a single output alarm.
The input alarms are configurable according to:
1
Intermediate
2
Critical
3
Major
4
Minor
5
Warning
The output alarm is configured according to predefined categories.
External Alarm Pin-Outs
Table 7 External Alarm Interface Pin-Out Diagram
DB-9
Pin no.
Description
1
External input alarm #1
2
External input alarm #2
3
External input alarm #3
4
External input alarm #4
5
External input alarm #5
6
Relay #1, normally closed pin
7
Relay #1, common pin
8
Relay #1, normally open pin
9
GND
phn-3967_005v000
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External Alarms
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