UniPi Neuron L203 is a universal control unit. It is a PLC (Programmable Logic Controller).
Raspberry Pi 3 model B inside.
The L203 is a basic model of the Neuron L line, which, compared to Neuron S and Neuron M lines, features more I/O modules and larger dimensions. The L203 is an extended variant of the M203 and as other 200-line models, it is focused on a higher number of digital inputs and analog outputs. That makes the L203 suitable for extensive automation projects.
As standard, the unit is equipped with DIN rail mount to attach the unit into distribution box. The required space is 12 DIN modules (1 module = 17.5 mm width).
All Neuron units have the IP20 degree of protection
Standard Neuron model overview
|Type S, size on DIN rail: 4 modules = 7 cm||1-Wire bus
Ethernet 10/100 Mb
4 × 1.2 GHz CPU
1 GB RAM
|Type M, size on DIN rail: 8 modules = 14 cm|
|Type L, size on DIN rail: 12 modules = 21 cm|
|Extension modules, size on DIN rail: 4 modules = 7 cm|
Extension modules communicate over Modbus. It is possible to connect them to the control unit via RS485 interface. Extension modules are compatible with any control unit with the RS485 interface and Modbus support.
*Has integrated wireless GPRS module.
**Has integrated TR-76D smart IQRF transciever
Thanks to the 1 GB RAM and a quad-core 1.2 GHz CPU, the Neuron has a quick response time (ie. delay between input signal reception and output response) of about 0.5 ms. Thanks to that, the Neuron offers a performance of professional PLC in a compact affordable package, stored in durable aluminium case.
The 1-Wire channel supports up to 15 digital thermometers connected.
Digital inputs are designed for reading of binary values (0/1, on/off, open/closed etc.) and are thus suitable for connecting switches, motion sensors, window or door magnetic locks etc.
Digital outputs can be used to control binary state devices, such as lightning switches, window shutters control, remote door control etc.
Analog inputs are used to receive either 0-10V voltage or 0-20mA current signals. Alternatively, they can be used for reading data from corresponding sensors, such as resistance thermometers. The user can adjust the input mode via corresponding control software.
Analog outputs are used for control of external devices such as three-way valves or heat exchangers via 0-10V voltage or 0-20mA current signals. Analog outputs allow current or voltage regulation - alternatively, Group 1 inputs can be used in combination with resistance thermal sensors.
Relay outputs are designed for switching two-state devices via alternating or direct voltage. Relays thus can be used to switch boilers, water heaters, electric motors or other stronger relays. Neuron unit relays are designed for 5A maximum current and 250V alternating/30V direct voltage.
The Neuron is suitable for all systems excluding security systems. These can be integrated by interconnecting the Neuron with security system master control unit via the Modbus interface. The Modbus can be used for control and integration of any device supporting the protocol.
Neuron is CE and EMC tested. According to standard, all UniPi Neuron products can be used in:
See the EU declaration of conformity in product file tab. In accordance with European standards, Neuron is a professional control unit. For the US market, it represents an excellent automation development kit.
Technological specification of the product
Guide to set up and use this device, technological documentation
Modbus register map
Table overview of Modbus registers
Declaration of conformity
Regulatory Compliance and safety information added to each unit
|Dimensions||210 mm × 90 mm × 60 mm|
|CPU||4 × 1 GHz|
|1-Wire bus||Yes (galvanically isolated)|
|Power||24 V DC|
|RTC backup||maximum 7 days|
|Mounting||DIN (35 mm)|