Installation Guide
17
3.2.4 RS-485
Connector
RS-485 is the interface that communicates the Dome Camera and its control
device. Please connect the Control Keyboard to the Speed Dome Camera
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.
3.2.5
Cable Wiring and Connection
Users may need to conduct cable wiring when: (1) Connecting self-provided
cords to the connector housing (shown in the figure below) instead of using
the equipped data cable or (2) Connecting alarm input and output devices.
The table follows will illustrate the way to wire cords into the connector
housing (shown in the figures below). Please refer to the section
3.2.2 22-Pin
Connector Definition
for the exact position of each cord.
Pin
Corresponding Pins
(22-Pin Connector)
Definition
1
7,10
T+, R+ (D+)
2~4
Reserved
5
8,9
T-, R- (D-)
