User’s Manual
15
2.8
RS-485 Connector Definition
RS-485 is the interface that communicates the dome camera and its control
device. Please connect the control keyboard to the speed dome through the
terminal block. The recommended cables for RS-485 communication are
CAT 5
cables; maximum cable length for over 24-gauge wire is 4000 feet (1219
meters). If the total cable length exceeds 4000 feet, using a repeater to maintain
the signals is recommended. Please refer to the figure and table below for pin
defination and wiring.
Pin
Corresponding Pins
(22-Pin Connector)
Definition
1
7,10
T+, R+ (D+)
2
Reserved
3
Reserved
4
Reservied
5
8,9
T-, R- (D-)