UTC Fire and Security interlogix VR4930WDM Installation & Operation Instructions page 2

RS - 232 DATA
RS - 422 / 4-WIRE
RS-485 DATA
2-WIRE RS-485 DATA
7
6
5 DATA INPUT
4 DATA OUT
3
2
1 GROUND
- DATA INPUT
7
+ DATA INPUT
6
5
4
3 - DATA OUTPUT
2 + DATA OUTPUT
1
- DATA INPUT /
7
6
+ DATA INPUT /
5
4
3
2
1
OUTPUT
OUTPUT