Hello Mr Michael and Baglatzis,
        I am not too sure how to opto-isolate the RS232 to
the PC? Can you tell me more abt this.
        By the way, I had some budget to meet for this
project and I have no more excess amount to buy RS485. So I
have to make do with RS232.
        Thanks for your help again.

> noiSe, maybe you should look at either opto-isolate the
comm lines or use a
> RS485 that uses differential voltages to read the signal.

>opto-isolate the RS232 to PC.

With regards,
Siong
----------------------
Mr Teik Siong
tsk196@soton.ac.uk