J.P. Instruments EDM 760 Pilots Guide - Manual (Page 54)

Navigation Data Ports for GPS Comm
(These ports are completely independent of the EDM-760 serial data output port.)
Navigation Data (output of GPS; input to EDM-760)
Compatible with RS-232, TTL, RS-423, RS-422 SDA.
Serial data format 8 data, 1 start, no parity. Baud rates: 1,200, 4,800, or
9,600 depending on the GPS data output format. The EDM-760
automatically detects the GPS data output format and is independent of the
GPS-C setting.
Fuel Data (input to GPS; output of EDM-760)
Serial data format 8 data, 1 start, no parity. Baud rate: 9,600.
Output format is determined by the GPS-C setting, but may be over-ridden
by the GPS navigation format: If the EDM-760 senses Northstar or
NMEA-183 navigation data input, there will be no fuel data output.
Section 5 - Option Connector Pin Assignments
P3( middle) 15-pin connector Fuel Flow Option 15-pin
connector
Pin no. Pin no. Probe or function Pin no. Function
yel 1 red 2 Left TIT 1 RS-232 out
yel 3 red 4 Left OIL or TIT2 2 RS-232 in
yel 5 red 6 OAT wht 4 FF left signal
yel 9 red 10 Right TIT red 5 FF power
yel 11 red 12 Right OIL or TIT2 blk 6 FF return
7 Switch com
gray 7 Remote alarm 8 Switch EGT
red 8 + Power 9 Switch FF
wht 13 RS-232 data port 11 Remote alarm
blk 15 Engine ground 12 FF right signal
Interface connections to selected GPS models
EDM P4 conn Pin 1 P4 conn Pin 2
Arnav 5000 Pin 4 Pin 5
Garmin 195 (nc) Pin 4
Garmin 430 / 430 Pin 57 Pin 56
Northstar M3P (nc) Pin 6 (leave pin 11
open)
UPS GX50 / 60 Pin 4 Pin 5
Page 50 Engine Data Management