Bypass valve connection and voltage switch
Some drives feature an electrically-operated bypass
valve to minimize the effect on the steering when
the autopilot is in standby.
If the drive has a separate bypass valve, connect it
to the Bypass connection on the ACU, ensuring that
the voltage selection switch is set correctly to 12 V /
24 V as appropriate.
Important:
To avoid potential damage to
equipment, ensure voltage selector switch is set to
the correct setting. The bypass valve voltage may
be different from that of the drive itself. If in doubt,
consult the manufacturer of the drive unit.
Bypass valve connection colors
Color
Description
A
Red
Bypass valve Positive
(+) connection
B
Blue
Bypass valve Negative
(–) connection
VMU adapter connection — ACU-400
The ACU-400 interfaces to the ZF-Marine VMU (sail
pod drive) using the VMU adapter. The VMU adapter
connects to the ACU-400 as shown.
1.
ACU-400
2.
VMU adapter
3.
ZF-Marine VMU (Connection to sail pod drive)
Note:
The screen wire is terminated at the ZF-Marine
VMU and VMU adaptor. It is NOT connected at
the ACU-400.
Raymarine recommends the following cable
specification:
• 4-core (22 AWG) with overall screen
SeaTalkng® connection — ACU-200,
ACU-300, ACU-400
The ACU-200, ACU-300, and ACU-400 are
connected to a compatible autopilot controller using
SeaTalkng®.
The ACU-200, ACU-300, and ACU-400 connect to
the SeaTalkng® backbone using the supplied spur
cable.
Note:
For clarity, only the power-related ACU connections
are shown in the illustration above.
1.
SeaTalkng® power switch
2.
ACU connector panel
3.
Evolution™ to SeaTalkng® spur cable
4.
SeaTalkng® backbone
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