holrum@hotmail.com said: > While playing with the RFTG-m GPSO I tried using a couple of RS-422 to > RS-232 converters. These converters can be externally powered or > "self-powered" by the RS-232 signals. I have a SIGG CyberSerial 4S PCI card for RS-232 with a jumper to provide 5V or 12V to pin 9 I assume it was used to provide power to small things like USB does now. Package says Part No: JJ-P45012 -- These are my opinions. I hate spam.