195,65 excl. VAT

Converter of ARION/MODBUS RTU protocol to OpenTherm/plus

≤5 items in stock

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DM-OT2 replaces both older versions – DMM-OT (MODBUS protocol) and DM-OT (ARION protocol).


  • 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


Conversion type RS485 <-> OpenTherm
Mounting 35-mm DIN rail
RS485 communication protocol MODBUS RTU / ARION (selectable)
Transfer rate 9,600 bps to 115,200 bps
Galvanic isolation of RS485 Yes
Number of stations per RS485 network 63
Power 20 V DC to 30 V DC
Operation temperature -40 °C to 70 °C
Dimensions (w × h × d) (54 × 90 × 61) mm
Document File
DM-OT2 Data sheet dm-ot2_d_en_100.pdf
Drawing symbol dm-ot2_s_en_100.zip
ePLAN macro dm-ot2_se_en_100.zip
Operation manual dm-ot2_g_en_103.pdf