RS-485 cable

joseanio · February 2011

Hi all,

I have a RS-485 ( A, B, GND ) interface embeded in a Lighting control.
I want to connect to NI-900 serial port.

Could somebody please let me know the correct wire cable.

Thanks in advance

Jimweir192 · February 2011

The wiring for the AMX 9pin Ports is contained in the NI900 h/w reference guide - Page 18 to be exact.

With RS485 you need to be aware that A&B are sometimes referenced differently with different manufacturers, if things are not communicating, try swapping A & B over.

HTH

jjames · February 2011

Also, don't forget to send the 485 ENABLE command when you set the baud for the device.

Example: send_command dvPelcoD,"'SET BAUD 4800,N,8,1 485 ENABLE'";

joseanio · February 2011

I will try do it.

Thanks folks.

RS-485 cable

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