J.P. Instruments Fuel Scan 450M Pilots Guide - Manual (Page 20)

Page 18 FS-450M Fuel Scan
Navigation Data (output of GPS; input to FS-450M)
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
FS-450M automatically detects the GPS data output format and
is independent of the GPS-C setting.
Fuel Data (input to GPS; output of FS-450M)
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 FS-450M
senses Northstar or NMEA-183 navigation data input, there
will be no fuel data output.
Section 7 - Rear Panel Connector Pin Assignments
Rear Fuel Flow 9-pin connector
Pin no. Function
1 Power 12-28VDC (red)
2 Ground
(black)
3 FF transducer power (red)
4 Remote
alarm
5 FF transducer ground (black)
6 RS-232 out (to GPS)
7 Left FF transducer signal (white)
8 Right FF transducer signal (white)
9 RS-232 in (from GPS)
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