Orion Car Audio 420 - Manual (Page 20)

20 Orion 420 Weather Station
________________________________________________________________________
Columbia Weather Systems, Inc.
The Orion sensor transmitter has a standard internal RS-232 wiring as
shown below:
Terminal Number Signal Color
3 TX- Orange
5 RXD Black
6 SGND Green
19 VIN- White
20 VIN+ Red
For heated sensor transmitters, terminal 17 (HTG-) is connected to the
Blue wire and terminal 18 (HTG+) is connected to the Brown wire.