Opentherm to Modbus gateway
This module is ideal for controlling your OpenTherm boiler via UniPi. This new extension module brings new possibilities- controller and monitor in one piece of hardware.
We recommended to connect this module to UniPi via our USB-RS485 . It’s first module of our 2. generation of UniPi.
This module is a gateway for linking systems with Modbus RTU RS485 (EIA-485) communication and boilers with Opentherm+ (OT+) and thermostats.
It’s possible to use it in 2 different modes:
1. Monitor – module is only monitoring communication between boiler and thermostat
2. Controller – in this mode it is also possible to control the parameters of the boiler by writing to Modbus registers
-Selectable terminating resistor
-Up to 7 gateways in one Modbus line
Opentherm protocol support
Opentherm gateway function – monitoring:
-OT boiler and thermostat connection
-Prolonging the OT communication line
Communication Module MM-OT101 is mostly used for controlling and monitoring of OpenTherm boilers, HVAC and energy management. It uses 5-24V DC power supply and it’s ready to be installed on DIN rail.