MG SmartLink PLC Box Multi BMS Modbus TCP controller

MG SmartLink PLC Box Multi BMS Modbus TCP controller

MG SmartLink PLC Box Multi BMS Modbus TCP controller

The MG SmartLink PLC Box Multi BMS is an industrial communication and control interface that combines multiple MG Masters (HV or LV) into a single virtual battery bank. This solution is specifically designed for integration into automation environments such as PLC systems, SCADA, building management systems, and industrial charging environments. The PLC Box makes battery data available for external control or monitoring via both Modbus TCP (Ethernet) and CAN bus (NMEA2000/VE.Can). This enables seamless integration with Siemens, WAGO, Beckhoff, or Schneider PLCs, among others, without reliance on external EMS or GX devices. The PLC Box is ideal for demanding applications where direct signal transmission and functional control of the energy storage system are crucial. These include emergency stops, status indicators, automatic switching commands, and remote monitoring. Technical highlights * Combines up to 6 MG Masters (HV or LV) * Supports both Modbus TCP and CAN‑bus (NMEA2000) * 3 programmable relay outputs (0.8 A @ 60 VDC) * 1 digital output for status or charge indication * DIN rail mounting, powered via 8–60 VDC * Configurable via Bluetooth (MG Connect App) or USB (MG Diagnostic Tool) * Marine class approved hardware (PLC) Q&A for installers, engineers and system integrators: How many MG Masters can I connect? | Up to 6 MG Masters (HV or LV) are combined into one virtual battery cluster. Which protocols are supported? | Modbus TCP (Ethernet) for PLC/SCADA, and CAN‑bus (VE.Can or NMEA2000) for energy networks or chargers. What can I do with the relay outputs? | Use the 3 relay outputs to control chargers, alarms, emergency stop, status signals, or energy management. How do I configure the system? | Via Bluetooth with the MG Connect App or USB with the MG Diagnostic Tool. Is this product compatible with Victron GX? | Only functionally via CAN bus. For full visual Victron integration, it's better to use a SmartLink MX. Who is this product for? This solution is designed for engineers, installers and integrators working with: * SCADA & PLC control (Siemens, WAGO, Schneider, Beckhoff) * Industrial and building energy systems * Off-grid installations with industrial load control * Complex MG Master configurations with signaling or relay needs SmartLink PLC Box model comparison Feature MG3000307 Single BMS MG3000421 Multi BMS Total masters supported 1 MG Master (HV or LV) Up to 6 MG Masters Emergency Stop outputs 1 internal 6 internal E‑Stop relays Power supply master(s) Master supply via box External power supply required Use case Single master system Multiple master installations Article number MG3000307 MG3000421 Related articles: * MG Master HV | Battery Management System for high-voltage systems * MG Master LV | Battery Management System for low-voltage systems * MG Lithium Battery Modules | Battery modules compatible with HV/LV MG Masters Cross-sell: * MG SmartLink Plus * MG Energy Battery Monitor with Bluetooth * 24V Industrial Power Supply * Charging and energy components (CAN‑bus compatible) * Skylla-i 24/48V (CAN-bus version) * TC CAN-bus charger * Powerfinn Charger (CAN-bus) * Delta-Q IC Series * TSE Q2 chargers * PLC Integration * Siemens LOGO! 8 Modbus TCP PLC * WAGO PFC200 Controller * Beckhoff CX5130 Embedded PC * Signaling and switching equipment * LED indicator light (24V DC) * Acoustic alarm signal (24V buzzer) * E-Stop pushbutton with relay monitor * NO/NC relay module (DIN rail) Use cases where cross-selling is important: * Redundancy and failsafe monitoring via SCADA * Remote signaling of faults or charge status * Control of chargers, contactors or auxiliary loads * Full data acquisition and HMI display for industrial installations * Professionalization of installation with labeling, power supply and relay cabinets Up-sell: * MG SmartLink Plus — with Wi-Fi, Energy Portal and app insights * MG3000307 Single BMS * MG3000420 Single BMS+ * Bi-directional DC/DC converter * Victron Quattro 48/10K When are upsell items relevant? * When you require scale or extra safety (such as redundancy or failsafe) * For projects with industrial, maritime or off-grid requirements * When your customer requires visualization, logging or SCADA functionality * For commercial or certified applications where compliance and reporting are important Below you will find an optimized Q&A section for the webshop, specifically aimed at installers and system integrators working with the MG SmartLink PLC Box Multi BMS. These FAQs are technically sound, practically applicable and written with a focus on relevance, reliability and search engine optimization (SEO). ❓ FAQ — MG SmartLink PLC Box Multi BMS For installers, engineers and system integrators ???? What is the difference between the MG SmartLink PLC Box and the SmartLink MX? The SmartLink PLC Box is developed for industrial applications with Modbus TCP support and direct control of PLC systems. The SmartLink MX is aimed at integration with Victron GX systems (such as Cerbo GX) via CAN bus. Feature PLC Box SmartLink MX Protocol Modbus TCP + CAN‑bus CAN‑bus (VE.Can/NMEA2000) Relay outputs 3 relays + 1 digital No PLC integration Yes No Victron GX support Limited Full ???? For which applications is the PLC Box suitable? The SmartLink PLC Box is ideal for: * SCADA and building management systems * PLC controlled charge/discharge regulations * Industrial battery arrays * Signal control via relay (alarm, status, safety stop) ???? How many MG Masters can I connect to one PLC Box? You can combine up to 15 MG Masters (HV or LV) into one virtual battery bank via the PLC Box. The data is merged and output to external systems via Modbus TCP or CAN‑bus. ???? What data is made available via Modbus TCP? The SmartLink PLC Box provides, among other things, the following data: * Voltage (V) * Current (A) * State of Charge (SOC) * Temperature * Warnings and errors * Battery status (charging/discharging) This data can be read directly by SCADA, PLC or HMI systems. ???? How does the relay functionality work? The box has: * 3 programmable relay outputs (0.8 A @ 60 VDC) * 1 digital output for charge/discharge status These are configurable via the MG Connect App or with a Modbus register via your PLC. ???? Is the PLC Box also suitable for Victron Cerbo GX? To a limited extent. For full visual integration in Victron (such as GX Touch display and VRM) the SmartLink MX is more suitable. The PLC Box is intended for functional control, not for visual monitoring in the Victron ecosystem. ???? How do I connect the PLC Box? * Power supply: 8–60 VDC (typically via Aux from MG Master) * Communication: * CAN bus via RJ45 (NMEA2000/VE.Can) * Ethernet port for Modbus TCP * DIN rail mounting * Use CAN bus terminators at both ends ???? How do I configure the PLC Box? Configuration is done via: * MG Connect App (Bluetooth) * MG Diagnostic Tool (via USB) * PLC environment (via Modbus TCP) You can change settings such as relay logic, data protocol and battery bank priority. ???? Does the PLC Box support firmware updates? Yes. Firmware is updateable via the USB port with the MG Diagnostic Tool or via Bluetooth with the MG Connect App. ???? What are the physical specifications of the PLC Box? * Mounting: DIN rail * Power supply: 8–60 VDC * Consumption: approx. 1 W * Weight: approx. 0.5 kg * Connections: RJ45 CAN, Ethernet, USB, relay terminals

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