HVAC (Heating ventilation and air conditioning)


The Ambimat Electronics’s AmbiAutomation HVAC Bridge Board is designed and developed a device which is able to communicate on BACnet or MODBUS protocols with Building Automation devices like Chillers, VRVs, VAVs etc and monitor the vitals of the building network for preventive care and maintenance



  • Compact Size
  • Built in RTC
  • DHCP and Static IP support
  • Configurable baud rate, parity and stop bits for RS485
  • Complete isolation for RS485 and RJ45 connectors
  • Out-of-the-box GPRS/CAT 1/NB-IoT connectivity so no hassles with Building’s existing IT infrastructure




  • Building management
  • Energy management
  • Preventive maintenance


Data Interfaces supports:


  • RS232
  • RS485
  • Ethernet
  • Wi-Fi


Protocols supports:


  • BACnet IP
  • Proprietary RS232 communication


Data Communication Protocol to backend server:


  • Wi-Fi
  • Ethernet
  • GPRS/CAT 1/NB-IoT All communications will go over an encrypted channel to the server*


Power Supply:


  • 8-26VAC, 50/60Hz from the controls panel
  • <500mA of current draw
  • 12VDC with power adapter (available/optional)


Ethernet Interface:


  • Connector: 8-pin RJ-45 socket for Cat 5 UT
  • Physical and Data Link: IEEE 802.3i 10/100 BASE
  • Isolation: 1.5 kV galvanic
  • Number of devices: >1
  • Maximum Cable Length: 100m/328ft
  • Protocols: JSON, HTTP, BACnet IP,MODBUS TCP/IP


Serial Port (RS485/RS232) Interface:


  • Connector: 5.08mm 2 port terminal block
  • Physical Layer: EIA-485-A, 2-wire
  • Isolation: 15kV
  • Maximum number of nodes: 64
  • Baud Rate: 2400, 4800, 9600, 19200, 57600, 115200 bps
  • Protocols: MODBUS RTU




  • Quadband GPRS: (850/900/1800/1900 Mhz)
  • Antenna: External, Omnidirectional. Should be placed outside the enclosure for better reception
  • Connectivity: Internal module with an on-board SIM slot
  • CAT 1: Bands 3, 7, 20 and 21.
    Supports Reliance Jio, Airtel, Vodafone, Idea networks
  • Supports NB/IoT


User Interface Monitoring:


  • Web browser and mobile application
  • Indications on LEDs for status of device LED Indications: Power (RED), Ethernet link (orange and green),GPRS connectivity (Red/Green)


Enclosure Options:


  • IP65


Download HVAC Brochure