ND-6063

Forum 2005-2010 (read only) Hardware Interfacing
1

Hello,

I am trying to use a 8 output relay to control 8 Lights of 12 Volts each
here is the relay I am using labhitech.com

I need to send a signal to the RS 485 input of the relay, but i am not exactly sure how to send a signal from arduino to another device.
Any One ever used similar Device ?

Thanks and Regards,

Mateo

2

If it is RS485 then you need an RS485 shield to convert the signals from the TTL levels to RS485. This is a simple serial port, To send something out to a serial port just use the serial print command.

Are you sure it is RS485 and not RS232?

3

yes It is a RS 485 .
Do i need a max485 to build a RS 485 shield ?
Do i need to build something like this described on this page
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1245014666

many Thanks.

Mateo

4

Do i need to build something like this described on this page

Something like that should be fine. You would really only need to make it into a shield if you wanted to make it more convenient to connect and disconnect.

Ran