Power connection via Autopilot Control Unit (ACU-Series)
The SeaTalk NG backbone can be supplied 12 V dc power from a compatible Raymarine Autopilot Control Unit (ACU-Series).
ConnectionsPowerSeaTalk NGPower
The SeaTalk NG backbone must have a single power supply connection. If your SeaTalk NG backbone is supplied power directly from a battery or distribution panel, then you must ensure that the SeaTalk NG power switch on your ACU-Series is switched Off.
ACU-100, ACU-150 and SPX-5 autopilot control units cannot supply power to the SeaTalk NG backbone.

Fuse for SeaTalk NG power supply.
Power switch for SeaTalk NG power supply:
Select the OFF position if your SeaTalk NG backbone is supplied power directly from a battery or distribution panel.
Select the ON position if your SeaTalk NG backbone is supplied power by the ACU-Series.
ACU-Series/SPX-Series autopilot to SeaTalk NG spur cable (part number: R12112).