
EPN4122/4122i/4220/4220i
6
3.4 I/O Terminal Block
The I/O terminal block, located on the rear panel of the Base Board, can be used to develop
applications for alarm input and output, motion detection, PTZ control or a variety of other functions.
CON3
1 2 3 4 5 6 7 8 9 10 11 12
Pin Assignment
No. Functions No. Functions
1 GND (-) 8
Alarm In 1
GND (-)
2
Alarm Out B
NO (+) 9 Alarm In (+)
3 COM (-) 10
Alarm In 2
GND (-)
4 NC (+) 11 Alarm In (+)
5
Alarm Out A
NO (+) 12 GND (-)
6 COM (-)
NC (+)
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