Interlogix VR9930WDM Series - Manual (Page 2)

RS - 232 DATA
Ground
Data Input
7
6
5
4
3
2
1
8
20
+ Data Output
1
2
3
4
5
10
11
12
13
20
- Data Input
Data Output
+ Data Input
VT/VR9930WDM
RS - 422 / 4 - WIRE
RS - 485 DATA
2 - WIRE
RS - 485 DATA
- Data Output
1
2
3
4
5
10
11
12
13
20
- Data Input / Output
+ Data Input / Output
1
2
3
4
5
6
7
8
13
20
DSR
DCD
RTS
CTS
DTR
CONTROL LINES