Interlogix VR7400-2DRDT Series - Manual (Page 3)

VT/VR7430-2DRDT
RS232 DATA
ON
OFF
ON
2 1
RS422 DATA
ON
OFF
2 1
2-WIRE
RS485 DATA
ON
ON
OFF
2 1
4-WIRE
RS485 DATA
ON
2 1
ON ON
Ground
Data Input
Ground
Data Output
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
- Data Out
+ Data Out
- Data In
+ Data In
8
7
6
5
4
3
2
1
- Data In/Out
+ Data In/Out
8
7
6
5
4
3
2
1
- Data Out
+ Data Out
- Data In
+ Data In
OFF