Raymarine Evolution EV-1, Installation Instructions Manual

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7. Autopilot controller
8. ACU
9. Drive unit (example)
10. Rudder angle reference sensor / transducer (M81105)
Power connection — ACU-100, ACU-150
Power to the ACU-100 and ACU-150 must be from an appropriately fused and rated supply.
1. ACU-100, ACU-150 power connection panel
2. Vessel power distribution panel
Power connection colors
Color Description
A Red Power in Positive (+) 12 V dc
B Black
Power in Negative (–) 0 V dc
Warning: Positive ground systems
Do not connect this unit to a system which has positive grounding.
Fuses and circuit protection
There are 3 levels of power protection in the autopilot system. The drive (motor) and associated
cables are initially protected by the current sensing and stall condition detection within the ACU
hardware and software. A second level of protection is provided to these parts and the ACU
components by the ACU's internal power fuse. Protection for the entire autopilot system and its
wiring back to the main power distribution panel is provided by your vessel’s circuit breaker / fuse.
Power supply circuit protection
Protect the power supply for the Evolution system at the distribution board with a fuse or circuit
breaker that is suitable for the ACU. For guidance, refer to main power fuse rating stated on the ACU
connector panel. If in doubt, consult your local dealer.
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