Balmar 12" M12 Communications Cable for SG230 (N2K) & SG240 (RV-C)

Seamless NMEA 2000 and RV-C Network Integration for Balmar Battery Monitors

Reliable CANbus Data Transmission for Marine and RV Electrical Systems

The Balmar SG2-0405 Communications Cable provides a direct, plug-and-play interface to bridge your compatible Balmar battery monitoring system with an existing onboard network. Measuring 12 inches (approx. 305mm), this specialized adapter lead allows your smart shunt to broadcast vital battery telemetry directly to multi-function displays (MFDs), chartplotters, and central RV control panels via NMEA 2000 (N2K) or RV-C CANbus architectures.

Designed specifically for the Balmar SG230, SG235, and SG240 systems, this communications cable eliminates the need for complex field termination or delicate wire splicing. By utilising a factory-moulded harness, system integrators and DIY installers can achieve a reliable data link that maintains network integrity and ensures accurate, real-time visibility of state of charge (SoC), voltage, current draw, and battery health.

Engineered for Harsh Marine and Mobile Environments

Data networks in boats, caravans, and motorhomes are routinely exposed to constant vibration, moisture, and temperature fluctuations. Standard data cables often suffer from signal drop-outs or corrosion at the terminal junctions. The Balmar SG2-0405 is built with industrial-grade interconnects to mitigate these risks and maintain continuous communication across your backbone.

• Standardised M12 DeviceNet Interface: Features a threaded 5-pin M12 circular male connector that locks securely into standard NMEA 2000 T-connectors and RV-C drop ports, preventing accidental disconnection in high-vibration environments.
• Weather-Sealed Rectangular Plug: Equipped with a multi-pin Deutsch-style female connector featuring an integrated orange weather seal, ensuring a moisture-resistant mate with the Balmar smart link architecture.
• Reinforced Junction Protection: Heavy-duty heat shrink tubing fortifies the transition zones between the flexible outer sheathing and the terminals, providing superior strain relief during tight routing.
• Compact 12-Inch (Approx. 305mm) Length: Minimises excess cable clutter behind dashboards, electrical cabinets, and battery bays while offering sufficient reach to connect to an adjacent network backbone drop.
• Clear Identification Sleeve: Includes a transparent protective heat shrink sleeve over the identification label, allowing technicians to easily verify part numbers and network routing during future system maintenance.

Why Choose a Genuine Balmar Interconnect?

CANbus networks rely on precise impedance and shielding to prevent data packet loss and electromagnetic interference (EMI). Attempting to fabricate custom drop cables or using non-compliant adapters can introduce network faults that disrupt not only your battery monitor, but other critical devices sharing the NMEA 2000 or RV-C bus. This genuine Balmar accessory ensures exact pin-out compatibility and shielding continuity, protecting your sensitive onboard electronics from communication errors.

Typical Applications

• Connecting a Balmar SG230 or SG235 battery monitor to a marine NMEA 2000 backbone to view battery metrics on Garmin, Raymarine, Simrad, or B&G displays.
• Integrating a Balmar SG240 monitor into a recreational vehicle's RV-C CANbus system for centralised power management.
• Upgrading standalone Balmar shunt installations to networked configurations without replacing the primary wiring harness.

Complete Your Battery Monitoring Network

Ensure accurate, uninterrupted battery data across your vessel or recreational vehicle. Add the Balmar 12-inch (approx. 305mm) M12 Communications Cable to your system build today for a professional, weather-sealed network connection.