Data a 2-wire rs485, Data b 2-wire rs485, Data a 4-wire rs485 – Interlogix VADR14100WDM Series User Manual
Page 3: Data b 4-wire rs485
VADT/VADR14130WDM
DATA A
2-WIRE
RS485
ON
OFF
ON
2
1
7
6
5
4
3
2
1
13
14
- Data Input / Output
+ Data Input / Output
DATA B
2-WIRE
RS485
- Data Input / Output
13
12
11
10
9
8
7
14
15
+ Data Input / Output
DATA A
4-WIRE
RS485
ON
ON
ON
2
1
- Data Output
7
6
5
4
3
2
1
13
14
+ Data Output
- Data Input
+ Data Input
DATA B
4-WIRE
RS485
- Data Output
13
12
11
10
9
8
7
14
15
+ Data Output
- Data Input
+ Data Input
ON
OFF
ON
2
1
ON
ON
ON
2
1
NOTE: A 120 ohm resistor may
need to be connected across
the data lines to ensure proper
operation.
NOTE: A 120 ohm resistor may
need to be connected across
the data (IN) lines to ensure
proper operation.
NOTE: A 120 ohm resistor may
need to be connected across
the data (IN) lines to ensure
proper operation.
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