Temperature control and monitoring in a school building

[Anonimo]

I have a project to monitor and control the Heating in a School Building with four thermal points, and in each of them is three condensing boilers Immergas Victrix Pro 100kW connected in cascade controlled by a Cascade and zones regulator with T2B interface. In the building we want to place four PLC systems, HMI system and a central computer (dispatcher) to monitor all your sistems. Could help me with answers to some questions.

– The I2C connection cable between CPU module and I/O Module can be built in FTP cable and have a length of 50-60 m ?
– Is it possible to connect a network of Dallas 1-Wire temperature sensorswith Arduino board ?
– What kind of connection (485 or Ethernet) is better to connect all equipments in a distances of 50-60 meters between them ?
– How can I connect each regulator with T2B bus interface to CPU Modules ?

[Sergio Bertana]

The I2C bus cannot be elongated up to 50-60 m, it’s better to use CPU modules (Even the compact, the CPU alone or with some I/O modules directly attached to it) and connect all the modules between them by RS485 or Ethernet. There are some topics in the forum (Unfortunately most of them are in Italian) that treat the CPU modules network (Using a RS485 network, using the Ethernet).

The Dallas 1-Wire can be directly readed by our CPU modules, you have to use the 1-Wire to RS232 Adapter connected to any RS232 serial port (See topic and topic).

About  the connection between the equipments if possible it’s better to use the Ethernet, otherwise the RS485.

I don’t know the T2B bus, so I cannot give to you any information about this point. Have you any specification of T2B bus ?

About temperature management you can refer also to this topic, it treats a commercial room thermostat with Modbus interface. With the Touch screen panels it’s easy to create your own chrono termostat (See screenshot).

[Autore]

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