Bernee BN-800G Посібник - Сторінка 6

Переглянути онлайн або завантажити pdf Посібник для Конвертер мультимедіа Bernee BN-800G. Bernee BN-800G 8 сторінок. Indoor & outdoor decoder

（1） Control line adopts twisted pair cable which is better than parallel line in transmission

distance.

（2） Decoder adopts dual-core STP (shielded twisted pair) with RS485 communication. Cable

length should be within 1200m. Decoder can adopt chain connection or star connection. RS

＋（A） ,RS－（B） is signal end, connecting to A and B port of RS485 host (reverse connection

forbidden).

（3） Multi decoders connection should be finished between the two farthest decoders, moreover

adding 120Ω resistor.

12. RS485 controlled device use method:



Wiring method: matrix switcher directly connects to decoder. PC can adopt active or passive

RS232-485 converter for connecting with decoder.



When distance over 1200m or interference excesses, it is necessary to install a RS485 repeater.

When adopting star wiring, we'd better use RS485HUB which can turn 1 channel RS485 into 4



channels RS485. Thus all channels realize better isolation and less interference between each

other, besides effective transmission distance can also be lengthened.



When interference too serious or adopting non-twisted pair which leads to hard or disable control,

we should adopt RS485HUB or RS485 repeater suchlike devices.

13. Wiring Diagram:



RS+ (A) refers to RS485 plus communication; RS-(B) refers to RS485 minus communication.



DC12V and AC24V refer to the wiring terminal of power supply for camera.



AUX1 and AUX2 refer to the control switchers of camera power supply, wiper or light.

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