Wallboard Installation and Maintenance

Wallboard 10

 

 

 

 

 

 

System Wiring

The principle for wiring up your display wallboards is that the PC output port is connected to the input of each wallboard. See Figure 7.

The connection is RS485 and the screen of the cable is connected to the wallboard signal ground, which is floating.

The wallboard housing frame ground is connected to earth by the power cable

RS485

This standard officially allows 30 wallboards to be connected via a RS485 transmission cable of up to 1200 Meters to a PC RS485 port.

The PC TX+ is connected to the wallboard RX+; similarly, the PC TX- is connected to the wallboard RX-. The recommended technique is to run a screened cable from the PC to the nearest wallboard, then from this wallboard to the next nearest wallboard etc. At the last wallboard on the bus, it is necessary to connect a 120terminating resistor between the wallboard RX+ and RX- connections within the RJ45 connection box. See the diagram below.

The installation technique is that data input of each display is electronically connected to the transmit output of the PC.

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Installation & Maintenance

40DHB0002USBG Issue 1 (11/14/2001)

Wallboard Installation and Maintenance Page 44

Page 44
Image 44
Avaya 40DHB0002USBG manual System Wiring, RS485

40DHB0002USBG specifications

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