Autopilot Control Unit (ACU). The rugged ACU (Actuator Control Unit) delivers reliable autopilot drive power and also provides power to the SeaTalkng bus. Choose the ACU that fits your steering system type.. Drive Current Output. Maximum continuous 15 Amps at supply voltage. Drive Clutch Output. Up to 2.0 A continuous, selectable between 12 /24 V. Connections. Includes the M81105 Rotary Rudder Reference. Sleep switch. Power. Drive motor. Drive clutch. Ground. Nominal supply voltage. 12 V or 24 V. Operating voltage range. 10.8V to 31.2V dc. Power Consumption (standby) - Main Power Supply. 300 mA (12/24V). Power Consumption (standby) - SeaTalkng Power Supply. 20 mA (12V). SeaTalkng LEN (Load Equivalency Number). 1. SeaTalkng Power Out. 3 Amp at 12V (fuse protected at 3 Amp). Data Connections. SeaTalkng. Installation Environment. Operating Temperature: -20C to +55C (-4F to +131F). Storage Temperature: -30C to +70C (-22F to +158F). Relative Humidity: MAX 93%. Waterproof rating. Drip resist