This page provides an overview of the wiring and pinout for the GRNbms MK3 Mini. Please refer to the respective Wiki pages for detailed information about CAN, RS485, and Modbus communication.

⚠️ Power over Ethernet (PoE) is not supported for GRN products and must not be used under any circumstances. The use of PoE with GRN products is strictly prohibited. Any non-compliance with this requirement may result in damage to the equipment. The company assumes no liability for any damages, malfunctions, or consequential losses arising from such misuse.

• Recommended input voltage: 11 – 14 V DC
• Power should be supplied via the designated power input pins (see pinout table below).

• The RJ45 port is directly compatible with a standard Ethernet cable.
• Designed for seamless plug-and-play connection with the GRNcmu Multi Mini module.

• Compatible with standard 4-pin 12 V PC cooling fans.
• The GRNbms provides PWM control and tachometer feedback support.

The RS232 port on the GRNbms MK3 Mini is directly compatible with Victron’s VE.Direct protocol, specifically for reading current sensors (shunts).

• Enables direct connection to Victron-compatible shunts without the need for converters.
• Ideal for monitoring real-time current flow in systems using Victron infrastructure.

• Ready to use with Nextion displays.
• Direct plug-in, no additional adapters required.

1x 2.54-8P LCSC Part: C2927489
2x 2,54-2P LCSC Part: C2927483
3x 2,54-4P LCSC Part: C2927485
1x 2,54-3P LCSC Part: C2927484

Supply & Relays

5V Aux

RS232

Sensors

GRNcmu RJ45

Inverter RJ45

Inverter, CMU, Shunt - CAN

Display

FAN

RS232