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Simrad AP20 Autopilot
70 20220505H
The unit is opened by removing the three screws on the back
cover. Inside are two sets of micro-switches, a printed circuit
board with a plug-in terminal and a jumper strap.
4.17 Interfacing
With the AP20 autopilot system there are several possibilities to
connect to other equipment for data exchange:
1. J3000X includes a single NMEA input/output port.
2. J300X includes two NMEA input/output ports and Clock Data
interface to Anritsu and Furuno radars.
3. The optional NI300X NMEA Interface (expansion) Unit with
4 additional NMEA input/output ports.
The NMEA output may also drive IS15 instruments directly.
The different connecting diagrams below illustrate the interface
possibilities.
Note ! See also Interface Setting, page 90.
4.18 Single NMEA input/output
RX1
RX1+
MAIN PCB
NMEA
Input 1
Vbat+
Sys. sel.
Gnd
TX1
TX1+
NMEA
Output1
NMEA listener
NAV RECEIVER
OR PLOTTER
(NMEA talker)
JUNCTION UNIT
RUDDER instr.
COMPASS instr.
RADAR
TB13
TB14
Note
Figure 4-17 Single NMEA connection
Note ! If an IS15 Instrument is powered from TB14 Vbat+ and Gnd,
please observe that Vbat output voltage will follow mains supply
voltage (IS15 Compass = 12V only!).
72


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