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20 Pelco Manual C690M-E (11/04)
Unsupervised Alarm Input Configuration and Wiring
Unsupervised relay contacts are not terminated. They are wired as either normally open or
normally closed. Set switch 1 down. Set switch 2 up for normally closed (N.C.) or down for
normally open (N.O.). Refer to Figure 6.
Unsupervised modes are easily defeated and should not be used in critical situations when
security is most important.
Figure 6. Unsupervised Alarm Input Wiring
1234
NTSC/PAL NOT USED
ALM
UNIT
+V
GND
NO ALARM
NORMALLY CLOSED
ALM
UNIT
+V
GND
NORMAL
ALARM CONDITION
ALM
UNIT
+V
GND
ALARM CONDITION
CUT WIRE
NO ALARM
NORMALLY OPEN
NORMAL
ALARM CONDITION
NO ALARM CONDITION
UNSUPERVISED, NORMALLY OPEN
UNSUPERVISED, NORMALLY CLOSED
ALM
UNIT
+V
GND
ALM
UNIT
+V
GND
ALM
UNIT
+V
GND
CUT WIRE
NEVER WILL BE AN
ALARM CONDITION
HERE
1234
SWITCH
SETTINGS
UNSUPERVISED, NORMALLY
OPEN (NTSC)
NTSC/PAL NOT USED
SWITCH
SETTINGS
UNSUPERVISED, NORMALLY
CLOSED (NTSC)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
UNSUPERVISED GROUP ALARM WIRING CONDITIONS
UNSUPERVISED MODE CONSIDERATIONS
INDIVIDUAL ALARM WIRING CONDITIONS