Arco Marine
Arco Zeus Alternator Regulator field-control connections
Identify the regulator's field-control interface and review its manufacturer harness requirements. The charging power circuit needs the selected alternator, battery and protection before it can be drawn.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Continuous draw
- 0.5 A
Connection overview
Field-control view for the Zeus Regulator.
Conceptual field-harness interface only. The Zeus guide requires a field fuse for N-type alternators, selected for their field current up to 30 A; that unselected fuse is not drawn. The complete installation also needs protected ALT V+ and BAT V+ supplies, ground, sensing and charge-stop controls.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation (rev. cover v1.3; internal pages v1.2), checked 2026-10-01. Manufacturer documentation →
Separate regulator power from battery-bank voltage
Zeus can regulate alternators for nominal 12, 24, 36 and 48 V banks, but the reviewed installation guide's BAT V+ supply is 12 V only. The battery/control diagram on printed page 19 explicitly distinguishes that power lead from the battery-voltage sense leads. The ARCO datasheet independently lists 12 V regulator source voltage.
Do not power BAT V+ directly from a 24/48 V house bus simply because Zeus supports regulating that bank. Provide the specified 12 V supply and common reference, with protection and sensing arranged according to the exact harness diagram.
Expand the simplified canvas connections
The three canvas pins show only power, ground and conceptual field control. The real installation also includes alternator supply/ground, ignition/tach, separate battery sensing, temperature sensors, shunt sense pairs and optional BMS/network connections. Printed pages 17–20 show these harnesses and identify the field, alternator-supply and battery-supply wires requiring fuses.
Select the harness for the alternator's P/N field type and use manufacturer-specific field current and fuse requirements. The canvas's 1 A signal limit is not a physical field-driver rating. Wire and check the harness with it unplugged from Zeus, as the installation guide directs.
Configure shunts and BMS control
Enter actual battery chemistry/capacity, charge limits, alternator poles and shunt A/mV ratings. The guide requires a battery shunt for bank-current limiting; an alternator shunt serves a different measurement. Confirm polarity and zero/current readings before enabling full output.
The settings manual describes ATC as high to permit charging and low to stop when that input is enabled. Test the BMS stop path before relying on it. Feature inputs have different logic and must not receive positive voltage indiscriminately.
Verify integration and fault response
Choose the correct CAN data source, protocol settings and harness for the intended BMS/GX integration. An RJ45 or NMEA connector alone does not establish compatible pinout or charging control. Set thermal, battery and field limits, then test idle, hot operation and BMS shutdown.
For systems that disconnect battery negative, the guide requires disconnecting Zeus's battery/control harness before maintenance and reconnecting it only after ground and power are restored. Network monitoring does not replace that power-sequencing instruction or the physical charge-stop path.
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with Zeus connected. Review the selected parts and cable lengths, then edit the diagram in Crimp.
The model only picks parts and draws the connections. Every wire size and fuse rating still comes from Crimp's own sizing, never from the model.
Enable JavaScript to describe your system.
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
External alternator regulator for 12–48 V battery banks, powered by a separate 12 V BAT V+ supply. Requires the matching alternator harness, sensing and configured BMS charge-stop path; the three canvas pins omit most controls and do not carry main charge current.
- Nominal voltage
- 12 V
- Compatible systems
- 12 V
- Continuous draw
- 0.5 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
BAT V+
positive · input
BAT GND
ground · input
Field
signal · output
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Connection overview. This diagram explains the connection arrangement; it does not calculate cable sizes or protection for the installation. Follow the manufacturer’s complete wiring and protection instructions.
Read how the sizing worksNext step
Plan your installation with Zeus Regulator.
Open the connection overview as a new project, or add this component to a diagram you already have.
Start drawing, sizing and checking without an account. Your drawing saves in this browser. See Pricing for the equipment allowance and the one-time export offer available to you.