Operation Manual

Simrad AP20 Autopilot
68 20220505H
• Alternatively, if there is no free receptacle, cut the connector
from the cable and connect the wires in parallel with the wires
going from the junction unit to the control unit. Do not
connect the yellow and the green wire, but secure them from
connection to the terminal or chassis.
J3XX
JUNCTION UNIT
RFC35R
RATE
COMPASS
JUNCTION UNIT
MAIN PCB
Robnet
Vsys+
Vsys
GryPnk
J1
NMEA
J2
ROBNET
J3
EXT.COMP
PINK GREY
PINK GREY
WHITE
BROWN
Bus+ Bus
Bn
Wht
WHITE
BROWN
RATE PCB
TB15
Figure 4-14 Alternative connection to J3XX Robnet terminal
• Select RFC = ROBNET in the Installation:Interface Setup.
• Select RFC as compass in the User Setup Menu.
• Perform the compass calibration as described on page 97.
Note ! After turn on the compass will stabilize in less than 30 seconds,
but it will need another 10 minutes to get the full effect of the
rate sensor.
Refer to page 98 to compensate for any permanent off-set after
the calibration is completed.
RFC35R calibration data is stored in the compass and will not be
deleted by a Master Reset in the autopilot. Offset compensation,
however, must be reset.