{"id":11942,"date":"2021-04-08T13:40:40","date_gmt":"2021-04-08T11:40:40","guid":{"rendered":"https:\/\/amitomation.cz\/dm-mpbus2-effective-connection-of-drives-via-the-mp-bus-interface\/"},"modified":"2021-04-09T15:01:07","modified_gmt":"2021-04-09T13:01:07","slug":"dm-mpbus2-effective-connection-of-drives-via-the-mp-bus-interface","status":"publish","type":"post","link":"https:\/\/amitomation.cz\/en\/dm-mpbus2-effective-connection-of-drives-via-the-mp-bus-interface\/","title":{"rendered":"DM-MPBUS2 \u2013 effective connection of drives via MP-Bus interface"},"content":{"rendered":"

The technology of the specialised MP-Bus network<\/strong> for Belimo drives is nothing new for a seasoned HVAC engineer. Five years ago, the AMiT company introduced universal communication converters between MP-Bus to RS485 \u2013 DM-MPBUS for the proprietary ARION<\/strong> protocol and DMM-MPBUS for the MODBUS RTU<\/strong> protocol. Let us now introduce the new unified converter \u2013 DM-MPBUS2. Not only does it support both communication protocols but it also features LEDs that indicate the state of MP-Bus network peripherals.<\/p>\n

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MP-Bus<\/h3>\n

MP-Bus was developed to facilitate communication for a master-multislave<\/strong> network and for controlling up to<\/strong> 8 HVAC devices<\/strong> (heating, ventilation, air-conditioning). The most common devices thus controlled are servomotors, control valves and VAV (variable air volume) units. The interface as such consists of three conductors \u2013 power (24 V), ground (GND) and data (MP) (power and communication share one cable). There aren\u2019t high requirements for the MP-Bus network topology \u2013 it can be linear, star, ring, tree or a mix of the previous topologies.<\/p>\n

\"MP-Bus<\/a><\/p>\n

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Belimo drives feature a connector for a single sensor e.g. a passive resistance sensor (Pt1000, Ni1000 or NTC), an active sensor (output 0-10 V) or a contactor. After connecting it to the drive, the analogue signal is converted to digital data and shared via the MP-Bus network with the superior control system.<\/p>\n

Data transfer between the master and peripherals is not limited to various control process values \u2013 e.g. values measured by thermistors. The bus can be just as easily used to gather operation data, current settings or alarm statuses.<\/p>\n

The aforementioned properties are useful especially for the following aspects of automation projects:<\/p>\n