Omega Vehicle Security OMG-ULTRACOMM2-PCI RS-232 - Manual (Page 17)

Technical Description
Omega Engineering OMG-ULTRA COMM+2.PCI Page 13
RS-422/485
Signal Name Pin # Mode
GND Ground 5
TX + Transmit Data Positive 4 Output
TX- Transmit Data Negative 3 Output
RTS+ Request To Send Positive 6 Output
RTS- Request To Send Negative 7 Output
RX+ Receive Data Positive 1 Input
RX- Receive Data Negative 2 Input
CTS+ Clear To Send Positive 9 Input
CTS- Clear To Send Negative 8 Input