Humminbird NMEA0183 Quick Start Manual

Interfacing an NMEA0183 Compass (HRS1) to the
Humminbird SCP110 Auto Pilot Computer
The following document describes a methodology that can be used for interfacing
the HRS1 sensor or a compatible 4800 baud NMEA0183 heading sensor to the
NMEA0183 heading input located at connector TB 3 in the SCP 110 autopilot.
The above figure shows the connector location, TB3 located on the SCP110
Autopilot Processor main board. This connection is used to input 4800 baud
NMEA 0183 data from the HRS1 sensor (RS232) or an equivalent NMEA0183
heading sensor supplying; HDG @ 10Hz, HDM @ 10 Hz, HDT @ 1 Hz.
The mating connector and pins for the TB3 connection are;
AMP P/N 280360 (1 each) and P/N 181271-1 (6 each)
When interfacing the HRS1 to a NMEA 0183 device, use the White Data A+ wire
and the Black Data - ground wire of the HRS1 interface cable as shown in the
above diagram to provide a single ended output to the TB3 NMEA 0183
interface. Use the NMEA 0183 output at TB 2 to interface the heading data to the