Interlogix VR71630-2DRDT-R3 Series - Manual (Page 2)

VT/VR71630 -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
Data Input
Ground
Data Output
7
6
5
4
3
2
1
7
6
5
4
3
2
1
- Data Out
+ Data Out
- Data In
+ Data In
7
6
5
4
3
2
1
- Data In/Out
+ Data In/Out
7
6
5
4
3
2
1
- Data Out
+ Data Out
- Data In
+ Data In
OFF
NOTE: A 120 ohm resistor (provided)
may need to be connected across
the data lines to ensure proper
operation.
NOTE: A 120 ohm resistor (provided)
may need to be connected across
the data (IN) lines to ensure proper
operation.