UTC Fire and Security Interlogix VR1910 Installation & Operation Instructions page 2

RS232 DATA
RS422 DATA
2-WIRE
RS485 DATA
4-WIRE
RS485 DATA
NOT USED
VT/VR1900
OFF OFF
1 2
ON
OFF OFF
1 2
ON
OFF
1 2
ON
ON
2
1
ON
ON ON
OFF
2
1
ON
ON
NOTE: Switch 3
ON: will pass data.
OFF: will pass Tamper Switch status and data from
VR to VT, but not from VT to VR.
FUNCTIONALITY OF TAMPER SWITCH:
The tamper switch terminals on the VR will open upon one of
the following conditions; loss of carrier, loss of video, switching
of SW3 on the VT to the ON position.
Tamper Switch
7
6
Data Input
5
4
Data Output
3
2
Ground
1
Tamper Switch
7
- Data Input
6
5
+Data Input
4
- Data Output
3
2 +Data Output
1
Tamper Switch
7
- Data Input/ Output
6
+Data Input/ Output
5
4
3
2
1
Tamper Switch
7
- Data Input
6
5
+Data Input
4
3 - Data Output
2
+Data Output
1