Data Cable Wiring for the Maxon CP-530 and PicPar Modem

This page simply describes the pinouts and wiring conventions we're using to hook our Maxon Data Radios to the Baycom/Tigertronics PicPar modems.

Signal Maxon Color DB-9
TXD 1 White 1
RXD 2 Green 5
PTT 3 Red 3
Signal Ground 6 Black 9
Frame Ground 4 Shield None

Note that on at least one of the Maxon radios we've converted, the black wire from data connector pin 6 does not go to ground. Check for continuity before putting the radio together; it's easy to find another ground point if necessary.