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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

All Neuron models are using the Raspberry Pi Model B as its central processing unit. Each I/O group is connected to the CPU and a central communication channel for all group processors. There is no communication between I/O groups. Each processor can also function independently on the CPU, allowing users to retain basic control of I/O modules in the event of CPU malfunction or software issue.

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

Along with basic I/O features this product offers additional unique features, either improving its performance or making it ready for cases of emergency. This functionality is implemented in the microcontroller of each I/O group thus do not rely on the main compute module or the runnin applitaction.

Direct Switch

Direct switch allows you to configure in a such way, that it autonomously react to a input signal on digital input to switch digital output. It also comes in handy in case of malfunction of the master control unit or its application.

Default configuration

It is possible to store default settings of inputs, outputs and communication lines inside the module memory and when the device reboots, it configures itself according to stored default settings.

Master Watchdog

This function periodically controls communication with the master control unit. If for a period predetermined by a user there is no communication with the master unit, it will load and set the stored default settings. Your applications will function even in emergency cases.

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.