This is an old revision of the document!


Unipi Neuron

Unipi Neuron is a modular programmable logic controller (PLC) product line designed for control, regulation and monitoring of smart building systems, HVAC (Heating, Ventilation, Air Conditioning) systems and both home and industrial automation systems. Thanks to its modular architecture and compact design, the Neuron represents a highly flexible and affordable solution for the quickly expanding field of smart technology. Customers can also utilize the Neuron for smart energy management to achieve better energy efficiency and reduce expenses.

Each Neuron model is divided into one to three input-output (I/O) groups depending on the model, each containing a group of input, output and/or communication modules. The Neuron can contain 1 (S-series), 2 (M-series) or 3 (L-series) I/O groups.

Each I/O circuit board is controlled by its STM32 processor, which controls inputs and outputs and communicates with the central processing unit (CPU). Processors are using custom firmware containing not only basic I/O functions, but also additional functions and features.

All components are encased in a durable metal case made from eloxed aluminium with IP20 degree of protection against external hazards. The case can be customized - for more info, see the OEM solutions page

Standard Neuron models are using an integrated Raspberry Pi 3 Model B as a computing module. The S103 (Raspberry Pi 4) features an integrated Raspberry Pi 4 Model B. The following table compares technical parameters of both options:

Depending on the model, the Neuron product line can offer up to:

  • up to 64 digital inputs
  • up to 4 digital outputs
  • up to 56 relay outputs
  • up to 9 analog inputs
  • up to 9 analog outputs
  • up to 3 RS485 universal bus ports
  • various combinations of the above-mentioned

Additional functionality

By default, all Neuron models feature up to three RS485 serial lines for connecting of external devices or extension modules (i.e. Extensions). One line can communicate with up to 32 devices, using the Modbus RTU protocol.

Each Neuron also features a single 1-Wire bus for the passive reading of data from corresponding 1-Wire sensors (humidity sensors, temperature sensors etc.). One bus can receive data from up to 15 sensors at once (provided a suitable 1-Wire hub is used).

As the Unipi Neuron product line is based on the Raspberry Pi, all Neuron controllers feature up to 4 USB ports. These ports can be used for connecting various USB convertors, external memory drives etc. We do not recommend using them to power external devices.

The exact type of Raspberry Pi used can be determined by checking the product's version on its manufacturer sticker:

- version 2.x = Raspberry Pi 3 Model B - version 3.x = Raspberry Pi 3 Model B+ - version 4.x = Raspberry Pi 4 Model B

Explanation

  1. Powered by Raspberry Pi 4 Model B
  2. GPRS/GSM module
  3. IQRF wireless network coordinator (learn more)