Communications converter DM-OT2

protocolRS-485Modbus RTU

The DM-OT2 is a converter of the RS485 interface (with MODBUS RTU or ARION protocol) to the OpenTherm/plus (OT/+) interface. The converter operates as a control unit with the OpenTherm interface in the master role and enables control of several types of boilers. The converter communicates with the boiler continuously, independently from the communication with the control system. Up to 63 DM-OT2 converters can operate at the same time in an RS485 network. With the MODBUS protocol selected, the converter allows reading or writing any available DATA-ID offered by peripherals to the OpenTherm/plus network. This converter replaces both older versions – DMM-OT (MODBUS) and DM-OT (ARION). -RS485 line with MODBUS RTU or ARION protocol -OpenTherm/plus (OT/+) specification -power supply and status indication by LED -35 mm DIN rail mounting -power supply 24 V DC / AC