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

31-page 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)