Simrad Autopilot Compass
12 20220653 / Rev. C
RFC35N can be expanded with an optional plug-in SIN PCB to
provide an analogue sin/cosine signal to other autopilots; AP200
and AP45 e.t.c. See RFC35NS description below.
3.3 RFC35NS Compass (RFC35N + SIN)
By adding the optional Sin PCB to a RFC35N compass you will
get additional analogue Sine/Cosine heading output.
The signal is according to the Simrad standard; ±2V with 2.5V
reference which makes the compass compatible with the obsolete
RFC250 (NMEA + Sin/Cosine output).
The compass can then be used with the following Robertson
autopilots; AP2500, AP200 series, AP40, AP45 and AP9Mk2/3.
(See also table at page 36.)
As from 1998 the RFC35NS (part no. 22083596) has been made
as a separate model to substitute the RFC250. See section 5.5.
An extra cable gland is supplied for a separate NMEA cable
connection if needed.
Note Optional SIN PCB cannot be used with a standard RFC35 - only
with RFC35N.
3.4 Rate compass (RC25, RC36, RC37)
All three models are based on the same fluxgate sensor and the
same rate sensor, hence the performance are the same for all
three.
However, they have different output signal and must therefore be
used as specified below.
RC25 Rate compass
RC25 is a “Robnet” compass that substitutes the previous
RFC35R Rate Compass. It comes with 15m (49’) cable with
Robnet connector and is used with thefollowing autopilots:
AP50, AP35, AP20/21/22, AP11 and AP300X.
RC36 Rate Compass
RC36 is a “Robnet2” compass and works only with the AP25
series autopilots, including AP16. It comes with a 15 m (49’)
cable with Robnet2 connector, fitting into the (male) Robnet2
connector at the back of the control unit (AP16, AP25, AP26).
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