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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?
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
Scroll down further on the link which Eric posted: (just click here)Ok thanks guys for giving the idea of RS422.
I searched but there is no data sheet for RS422.Did you find any data sheet?
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?
What about replacing the MAX232 with a MAX485 on the pic end then of course an adapter on the computer end, but I am sure one could be built also..You need an RS232 to RS485 adapter.
R.E.Smith Serial Communications RS485