Clarity WN-5040-720 manual Connections, Control RS232 & RS485, Connect to the computer

2.5 Connections

2.5.4 Connections, Control: RS232 & RS485

With serial control, you can control a whole wall, several walls, and any single display in them.

Connect to the computer

Connect the first cube in the wall to the serial out port of a computer or another type of controller, such as a video controller. Connect with computer serial cable, such as Cat-5, using straight-thru cable.

You will probably need to convert the 9-pin serial port to RJ45 with an adapter, which you can buy in most electronic stores.

For very long runs of RS485 cable, it may be neces- sary to terminate in the last Margay in the string. See

4.4“Controlling Margay with RS232/RS485” on page 74.

Wiring the adapter

To go from 9-pin D-sub serial connector on the back of the ccomputer to an RJ45 connector, use a standard RJ45-to-9-pin adapter. Wire it internally as shown. The wiring shown for this adapter is correct for straight-thrucables. Straight-thru cables are wired 1-to-1, 2-to-2, etc.

Yellow wire	pin 3
Black wire	pin 2
Green wire	pin 5
RJ45	9-pin
6	3
5	5
3	2

5 4 3 2 1

9 8 7 6

female 9-pin

Connect from the computer or controller to the first Margay. It doesn’t matter which cube this is.

Connect this first cube’s RS485 Out to the next cube’s RS485 In.

Start with RS232 and loop all the rest with RS485.

Information about controlling with RS232 is in

4.4“Controlling Margay with RS232/RS485” on page 74.

For best results, the RS485 cables should be twisted pair. The pairs are pins 3 & 6 (signal) and pins 1 & 2 (ground). CAT5 cable has the correct twisted pairs.

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