Sitex SP38 Autopilot, Installation And Operation Manual

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Sitex SP38 Installation and Operation
Document PN 29010101 V2r0
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Wiring the Control Head
The SP38 Control Head operates in the same voltage range as the SP38 SPU. See
3.2.2 Wire Gauge Requirements (see Table 1) for details.
Caution! The
SP38
Head are NOT reverse-polarity protected.
If you wire the wrong voltage polarity at J1, you will damage
the SPU and Control Head! This will void the warranty.
Power to supply the SP38 Control Head should be taken directly from a breaker or distribution
panel. The autopilot should be wired into its own individual breaker or fuse. See figure 27
below.
Figure.27 – Battery Connection to Master SP38 Head
The power cable of the SP38 control head is also used for configure the Master station in the
SP38 autopilot system.
All control heads and remote controllers communicate to the SPU through the NMEA 2000 bus.
When a station turns on, it starts from the “repeater” status, meaning it monitors all data from the
SPU but cannot operate the SPU. The user has to switch the Head to the “command” status
before it can be used to control the SPU.
A Master station is the one that will automatically place itself to the “command” status after the
device is turned on. To wire a SP38 Head to a Master station, connect the brown conductor of
the SP38 head power cable to the negative battery terminal. If you have more than one SP38
Heads, only one of them should be wired as a Master station.
NMEA 2000 network connection
Connect a standard NMEA 2000 drop cable between the network and the SP38 Control Head
NMEA 2000 port.
Ethernet
The Ethernet port is used for the purpose of software upgrade. Refer to SP38 software upgrade brief
for details.
Installation
CONNECT HEAD POWER CABLE TO
POWER CONNECTOR OF SP38 HEAD