Autopilot Control Unit (ACU), The rugged ACU (Actuator Control Unit) delivers reliable autopilot drive power and also provides power to the SeaTalk ng bus. Choose the ACU that fits your steering system type,Drive Current Output, Maximum continuous 30 Amps at supply voltage, Drive Clutch Output, Up to 4 Amp continuous at 12V on 12V systems, Up to 4 Amp continuous at 24V on 24V systems, Up to 4 Amp continuous at 12V on 24V systems , Connections, Includes the M81105 Rotary Rudder Reference Sleep switch, Power, Drive motor, Drive clutch, Ground, Digital Input / Output (DIO) , 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) – SeaTalk ng Power Supply, 20 mA (12V), SeaTalk ng LEN (Load Equivalency Number), 1, SeaTalk ng Power Out, 3 Amp at 12V (fuse protected at 3 Amp), Data Connections, SeaTalk ng. 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 resistant, Dimensions (W x H x D), 285mm x 211.5mm x 64.5mm (11.2 in x 8.3 in x 2.5 in), Weight, 2.2kg (4.84lbs), Conformance, Europe: 2004/108/EC, Australia and New Zealand: C-Tick, Compliance Level 2.