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Chapter 6 Interfaces
6.8 Alarms
The alarms port interface is a 15-way male DB15 connector (see Figure 11). This connector allows remote
notification of alarm conditions. Table 10 shows the alarms connector pinouts. Each alarm (Major, Minor,
Critical and Power) is the output of a SPDT relay contact. A common contact with normally open and
normally closed connections is included. Power alarm has just a common and normally open contact outputs.
The alarms port is designated as SELV.
CAUTION
Do not apply more than 60 Volts (maximum) to any pin or combination of pins on the Alarms con-
nector.
Figure 11. Alarms Connector
Table 10. Alarms Connector Pin-out
Pin No Description Pin No Description
1 Not used – do not connect 9 Minor alarm normally closed
2 Not used – do not connect 10 Minor alarm common
3 Not used – do not connect 11 Major alarm normally open
4 Not used – do not connect 12 Major alarm normally closed
5 Critical alarm normally open 13 Major alarm common
6 Critical alarm normally closed 14 Power alarm normally open
7 Critical alarm common 15 Power alarm common
8 Minor alarm normally open
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