control multiple instrument via a single port rs232

[moshez]

How can I connect from single rs232 port to multiple temperature controller that has a different addres for each. does it possible?

[Wayne.C]

moshez,

What communication standard do the temp controllers support?  If each controller has it's own address, it implies that they don't support RS-232. 

[Albert.Geven]

probably you have an rs485 connection

[pflores]

Serial Communication Overview

A Quick Comparison of RS-232, RS-422, and RS-485 Serial Communication Interfaces

[Broken_Arrow · Accepted solution]

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moshez wrote:
How can I connect from single rs232 port to multiple temperature controller that has a different addres for each. does it possible?

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I have done it with these. Knowing what position the switch is at is important in order to send the correct address bit. Tricky but do-able.

Message Edited by Broken Arrow on 09-03-2009 03:25 PM

[K C]

...and there are devices that can split up 1 rs-232 interface into more rs-232 interfaces. With a protocol like ModBus you can address one device and control the data traffic with one master.

Message Edited by K C on 09-04-2009 08:47 AM