Look into rs485; it is differential pair signaling, and will give good noise immunity over that distance. It is also easy to do - use a max485 instead of a max232 driver.Hi I want to transfer my RS232 data (9600bps) on 150m length.
Whats the hardware method I can use to transfer my data?
Also if you need to go over the max length you can make a box with rx-tx pairs to extend, you just need a power source at that point. A place I worked for did this for special orders and we would have to run the system with the full cable length and monitor data errors and data retrans.Suraj.
Use this as a ref, as Bill says RS422.
Serial Cable Length Limits (RS232, V.35, RS530, RS422/449), SCSI Cable Length Limits, Parallel Cable Length Limits
I've used the sn75174 and MAX3080s but see this page. You can get data sheets there as well:Hello BeeBop is this IC correct? MAX485? Can I do RS422 with MAX485?