Greetings.
I am interfacing a DVR (PC based, DB9 RS232 interface) with ATM serial printers and POS serial printers. We currently use a simple Y cable with the Tx and Rx spliced into which sends ASCII data from the ATM or POS system into the DVR's serial port and then into the video database, as well as printing on the serial receipt printer.
However, I need to build some sort of box which isolates the PC from the ATM/POS serial output and from the printer. I was thinking of using an optoisolator. I therefore need to find a circuit diagram of an optoisolator or similar circuit for RS232 splitter box.
Any ideas anyone?
Appreciate any help,
Gethin.
I am interfacing a DVR (PC based, DB9 RS232 interface) with ATM serial printers and POS serial printers. We currently use a simple Y cable with the Tx and Rx spliced into which sends ASCII data from the ATM or POS system into the DVR's serial port and then into the video database, as well as printing on the serial receipt printer.
However, I need to build some sort of box which isolates the PC from the ATM/POS serial output and from the printer. I was thinking of using an optoisolator. I therefore need to find a circuit diagram of an optoisolator or similar circuit for RS232 splitter box.
Any ideas anyone?
Appreciate any help,
Gethin.