C
ONNECTING
TO
THE
A
LARM
P
ORT
3-17
The following figure shows the pinout information for the DB-15
ALARM connector on the front panel.
Figure 3-11 External Alarm I/O Connections
1
11
6
2
12
7
9
10
3
4
NC
NO
COM
Major Alarm
NC
NO
COM
Minor Alarm
ExternalAlarm Input 1
ExternalAlarm Input 2
ExternalAlarm Input 3
Tobackplane via internal signal
convertercircuits.
Externalinput uses dry relay contact
topins 14, 15, 13 and 8 for grounding.
Foractive alarm, the relay is closed.
Alarm Connector
ExternalAlarm Input 4
ALARM_IN1_EXT_P
ALARM_IN1_EXT_RTN
Alarminput is isolated by photo-coupler.