User`s manual

User’s Manual
13
Pin Definition
2
ALM NC
4
ALM NO
6
ALM COM
11
ISOG
12
ALM-1
13
ALM-3
14
ALM-2
15
ALM-4
16
ALM-5
17
ALM-6
18
ALM-7
19
ALM-8
20
ALM GND
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-)