D-MAX Superior Speed Dome Technical & Service Manual - page 10
T E C H N I C A L S E R V I C E M A N U A L ( V E R . 1 . 1 )
10
B.
VIDEO OUTPUT
z This part connects with each other video equipment.
z If BNC cable is not in a condition for insulation, it may go out of video signals or with video
noise distortion therefore please make sure to have a proper connection to video signal
separating from GND entirely and then go for connection.
C. RS 485 DATA INPUT.
z Connect DI(+), DI(-) with RS 485(+) and RS 485(-) of Keyboard (DCK-255), DVR, PC and Web
Server in each.
z If the cables of RS 485 (+) and RS 485 (-) are switched or short-circuited that do not connect, it
cause the equipment to be not worked and faulty.
z Especially, please be careful not to be connected with ground of building and do not use wire
cables that are used for power sources. do not make wiring together with heavy power
(350VAC), it cause to faulty operation, injury or damage for the dome.
z By using RS 485, data can be transmitted as well as received for a distance of 1.2 km (about
4000 ft) totally. i. e., the length of whole wiring cables for data must be less than 1.2 km.
z Use the proper cables which have useful capability, specifications for video, power and data in
each.
z Never use wires in a same cable for connecting to power, data and so on. It may cause serious
injury, damage to the dome. For data cable, it is recommended to use twist paired shield cable.