ME30-24/D1 (BM) Modbus Gateway Installation Manual - ME3024D1-01-A Installation Manual Modbus Gateway AU 2508

⚠️ Safety Notice – Reverse Cycle Air Conditioners

This equipment must only be installed, commissioned, serviced and repaired by suitably qualified and licensed personnel.


Before commencing work, complete a task-specific risk assessment and ensure electrical isolation procedures, safe access, adequate service clearances and appropriate PPE have been considered. All work must comply with applicable regulations, standards and manufacturer requirements.


Particular care must be taken when working around electrical systems, refrigerant circuits, moving parts, roof spaces, ceiling spaces, confined spaces and working-at-heights hazards where applicable.


Do not proceed if safe access, required clearances, confined space risks or appropriate safety controls cannot be achieved and maintained. 


Safety takes priority over diagnosis, repairs, installation schedules and customer expectations. If the task cannot be completed safely, it must not proceed until the risks have been adequately controlled.


Pdf attached,



Installing the ME30-24/D1(BM) Modbus Gateway

Overview

The Modbus Gateway ME30-24/D1 (BM) enables communication between Braemar multi VRF air conditioning units and Building Management Systems (BMS) using Modbus RTU, Modbus TCP, and BACnet/IP protocols.

Safety & User Notices

  • Only qualified personnel should install this device.
  • Must be installed indoors, preferably inside a locked electrical control cabinet.
  • Avoid corrosive, explosive, or high-humidity environments.
  • Do not touch with wet hands or reverse power connections.

Key Features

  • Supports CAN, RS485, and Ethernet communication.
  • LED indicators for power, status, and data transmission.
  • DIP switch configuration for bus resistance and factory reset.
  • Web-based configuration interface (default IP: 192.168.1.150).

Installation Steps

1. Parts Included

  • 1 Gateway unit
  • 1 Installation manual

2. Mounting

  • Install in an electric control cabinet using 4 screws.
  • Keep power and communication lines 15cm apart to avoid interference.

3. Power Supply

  • Input: 24V DC
  • Use only one of the two available power input ports.

4. Communication Ports

PortFunction
CANConnects to AC units
RS485-1Connects to BMS or other gateways
Ethernet ETH0Connects to BMS via network
CONFIG, RS485-2, USB, SDNot used

DIP Switch Settings

  • Switch 1: CAN2 bus resistance (set to 1 if at end of bus)
  • Switch 2: RS485 bus resistance (set to 1 if at end of bus)
  • Switch 4: Factory reset (set to 1 and hold SHT/DWN button for 5s)

Network Configuration

  • Access via browser: http://192.168.1.150
  • Default login: Username: config, Password: config
  • Set IP, subnet mask, gateway, and protocol (Modbus/BACnet)

BMS Integration

  • Supports up to 16 outdoor units and 255 indoor units per gateway.
  • Use series connection for RS485 wiring (no star topology).
  • Add PV isolation relay if >30 gateways or >800m cable length.

BACnet Protocol Overview

  • Uses a simplified 4-layer OSI model.
  • Defines 9 object types (e.g., Analog Input, Binary Output, Multi-state Value).
  • BACnet Object ID formula:
    ID = P + N×256 + D×256×512 + M×256×512×4

TCP/IP Setup (Windows 10 Example)

  1. Go to Settings > Network & Internet
  2. Open Ethernet > Properties
  3. Select IPv4 > Properties
  4. Set IP to match gateway’s network (e.g., 192.168.1.x)