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CONTACT CLOSURE SIGNAL
The N3952 series is a contact closure signals collector. N3952TA converts 8-ch contact
closure signals to one RS232/RS422/RS485 data, and N3952RA converts
RS232/RS422/RS485 data to 8-ch contact closure signals. The N3952 series can transmit the
contact closure signals over a long distance when connecting with fiber optical transmission
system. The number of contact closure channels is default setting, so are the data format.
Typical Application Connection
VP
Dome
1
2
3
Earthing
GND
Alarm in2
GND
Alarm in3
GND
Alarm in4
GND
Remote
Sensor
Alarm in5
GND
Alarm in6
GND
Alarm in7
GND
Alarm in8
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
fiber
OP
Monitor
VP
●
●
●
●
4
Earthing
Alarm in1
PWR
PWR
PWR
●
1
2
3
Earthing OP
N3952TA
RS232
1
●
1
●
2
●
2
●
3
RS232
3
4
4
5
●
5
●
6
●
6
●
7
●
7
●
8
●
8
●
9
●
9
●
Keyboard
N3731TA
N3731RA
Figure 18. Contact closure signal
25
●
●
●
4
Earthing
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
N3952RA
COM1
N.O.1
COM2
N.O.2
COM3
N.O.3
COM4
N.O.4
COM5
N.O.5
COM6
N.O.6
COM7
N.O.7
COM8
N.O.8
Alarm
Panel