Installation manual

Chapter 3: Installation
58 Power, VHF antenna and external equipment
NMEA interface description
The NMEA interface supports NMEA 0183 v2.0, v2.1 and v2.3.
uP
U43
464k
500R
681R 120R 681R
4k42
U20
NMEA Driver
U43
U24
ACC connector
O pin4
O pin1
O pin2
O pin3
O
Vcc
Vcc
NMEA in+
NMEA in-
A
B
NMEA out+
NMEA out-
J4
NMEA interface Specifications
NMEA input:
Impedance: 600 Ohm
Max. 2mA at min. level of 2V
NMEA output
Load Impedance: > 60 Ohm
Drive load: < 35 mA