i-7561

[GeorgeHill]

I have an old pice of equipment that used a serial link to print its data. The connection the equipment is a round 9 pin connector with only three wires. The wires went to a DB25 connector that connected to the printer. The wires are labled on the DB25, pin 3 is TXD=Transmit Data, pin 7 is Ground and pin 20 is CTS= Clear to send. This is a RS485 serial connection. I want to connect this to my Lap Top with i-7561 and use my Hyper Terminal  to recieve  the  data.  I wanted to confirm the  connections and  is Hyper Terminal the best way to recieve this data. I do not want to use a printer.

Thank You

George Hill 

[Albert.Geven]

It probably is RS232 not 485 because that needs two wires for the data.

You can try to look with hyperterminal or with LabVIEW serial read functions.

Make sure that CTS has the correct polarity. Otherwise sending data wil not occur.

(either +12 or -12 V) or less if the machine builder knew too much (officially the levels should be -3V<signal>+3V but most of them work also with  0<signal>+3V