Furuno SC-60 manual Digital Interface

APPENDIX A

Digital Interface

Output sentences of channel 1 (HDG OUT)

HDT, HDM, ROT, VTG, ZDA, GGA (Talker: GP)

Output sentences of channel 2 (NAV OUT)

ROT, Gpatt, VTG, ZDA, GGA, GLL

Transmission interval

HDG OUT	HDT, HDM, ROT: 100 ms (two of three are selected.)
	VTG, ZDA, GGA: 1 s
NAV OUT:	Gpatt, ROT: 100 ms (two of three are selected.)
	200 ms (other cases)
	VTG, ZDA, GGA, GLL: 1 s
Load requirements as listener
Isolation:	Optocoupler

Input Impedance: 220 ohms (due to common use of output port, AD-10 and NMEA)

Max. Voltage:	±15 V
Threshold:	4 mA (In case of connection of FURUNO device talker)

Data transmission

Data is transmitted in serial asynchronous form in accordance with the standard referenced in 2.1 of IEC 61162-1. The first bit is a start bit and is followed by data bits, least-significant-bit as illustrated below.

The following parameters are used:

Baud rate: 4800

data bits: 8 (D7 = 0), parity none

stop bits: 1

D0 D1

D2 D3 D4

D5 D6 D7

start	data bits	stop
bit		bit

A-3