Installation guide

Installation Guide
20
3.4.4 RS-485 Connector Definition
RS-485 is the interface that communicates the 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-)