Digital Interface - Furuno DS-30 Operator's Manual

15. DIGITAL INTERFACE

(IEC 61162-1EDITION 2)
Output sentences of channel 1, 2 (NMEA/CIF 1, NMEA/CIF 2)
VDR, VHW, VTG, VLW (talker VD), VBW, ROT
Input sentences of channel 1, 2 (NMEA/CIF 1, NMEA/CIF 2)
ZDA, GLL, VTG, DBT, RMA, RMC
Transmission interval
1 s for any sentence
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
Start
bit
Schematic diagram
CIF: ON
IEC 61162-1 (NMEA 0183) OFF
5V
5V
180 ohm 47 ohm
470 ohm
D2 D3 D4 D5
Data bits
66P3318
J2/J3
SRCN6A16/10P
SRCN6A16/10S
1
TXD-A
2
TXD-B
22 ohm
47 ohm
RXD-A
3
47 ohm
4 RXD-B
NC
5
Load requirements as listener
22 ohm
Isolation: Optocoupler
9
NC Input Impedance: 30 ohms
10
Max. Voltage:
Threshold: 4 mA
D6 D7
Stop
bit
CO-0.2X5P
MAX. 25mA
±
2.5V
15-1
Output drive capability
Max. 25 mA