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Railduino 2.1 - LAN

CZK 7,999
VAT incl.

6610.74 VAT excl.

Input / Output module based on Arduino platform

24x digital inputs, 12x relay outputs, 8x digital outputs, 2x analog inputs, 2x analog outputs, 1-wire, RS485, Ethernet ...

24DI.png 12RO.png 8DO.png 2AI.png 2AO.png wire.png 485.png LAN.png dip.png din.png LED.png

Relays type
    On stock    23 pieces

Railduino module is a device working in connection with superior control system (e.g. Loxone) as so called distributed inputs / outputs. With this connection the control system is able to control external devices (e.g. lights, pumps etc.) using outputs or sense the values at the inputs of the module (e.g. buttons, contacts etc.). 

Module is equipped with both digital and analog inputs. There are also relay, digital and analog outputs - see the table below. Module can handle 1-wire devices 
(Maxim/Dallas) as favourite temperature sensors DS18B20 or DS2438 (Unica 1wire sens. module)

Inputs/outputs can be read/controlled by communication bus RS485 or by LAN within computer network. Both types of connections communicate using UDP protocol (User defined protocol). There can be connected up to 15 Railduino modules within the same network/bus.

Version 2.1 - better protection of internal power supply, removed bug for L4 output, improved EMC compatibility

Features and functions:

24x digital inputs - optically separated, max. input voltage 24V DC
12x relay outputs - galvanically separated, max. input current 7A/5A at 230V AC for 1 output
4x digital outputs High side switch - load current max 2A for 1 output, max 24V DC
4x digital outputs Low side switch - load current max 2A for 1 output, max 24V DC
2x analog inputs - input voltage 0 - 10V, resolution 1024 bitů
2x analog outputs - output voltage 0 - 10V 
1-wire bus - max. 10 pcs of sensors Dallas DS18B20, DS2438 (Unica 1wire sensor. modules)
RS485 bus - serial communication with superior control systems
USB - for reprogramming of the Arduino module
LAN - communication with computer network (only the module with this option!)
- status LEDs - indication and status of the module
DIP switch - module address settings, other function

Module settings - address and functions

Communication settings


Status LED diodes


Connection to Loxone

A – LAN connection
B – RS485 bus connection

Both connections use UDP communication protocol (User defined protocol) or Modbus protocol (TCP or RTU) 

UDP communication settings in Loxone Config

LAN settings of communication for sensing inputs in Loxone Config:

LAN settings of communication for control of outputs in Loxone Config - address: "/dev/udp/"

RS485 settings of communication in Loxone Config:

MODBUS TCP communication settings in Loxone Config

Modbus mapa a adresování proměnných

Settings of Modbus TCP - insert Modbus server and set IP and port in Loxone Config:

Settings of Modbus TCP - set the address of the Modbus client - Railduino module

1. UDP protocol - Digital inputs

2. UDP protocol - Relay outputs

3. UDP protocol - Digital outputs - High side switch

4. UDP protocol - Digital outputs - Low side switch

5. UDP protocol - Analog inputs

6. UDP protocol - Analog outputs

7. UDP protocol - 1-wire bus

1. Modbus protocol - Digital inputs

2. Modbus protocol - Relay outputs

1. "What kind of connection to use with Loxone system?"

It depends what are you expecting: LAN connection is fast (delay in terms of microseconds) with immediate responses,
but there is need some workaround in LAN safety settings (subnets, VLANs etc..). RS485 is slower (delay in terms of
miliseconds), but is simple, safe and reliable.

2. "How long it will take from pushing the wall switch to actually switching on the lights?"

Whole procedure of communication from Railduino to Loxone and back can be described as follows:
1. Request processing by Railduino (pusching the button) and sending the satet to Loxone – in case of LAN max.
20ms, in case of RS485 max. 30ms
2. Processing in Loxone (reception of information and making of further steps) and sending command to
Railduino– in case of LAN max. 25ms, in case of RS485 max. 35ms
3. Processing in Railduino module (switching the lights on) ‐ in case of LAN max. 20ms, in case of RS485 max.
So the react time will be max. 95ms (in both cases of LAN or RS485).
Delay is minimum, longer delay will be created by powering up the current power source of LED lights.

3. "Is it possible to connect more then one Railduino to the same bus?"

Yes, every modul has its own address which is set using the DIP switch settings. It is possible to connect up to 15 modules
operating at the same bus LAN or RS485.

4. "How is the Railduino programmed with in Loxone Config? Does thy system detect inputs and outputs?"

It is neccessary to insert the virtual inputs and outputs into the Loxone program and make the correct settings (in case of
LAN connection). More details are in the Loxone example file which can be downloaded in the download section.

5. "What is the power consumption of Railduino module?"

In the worst scenario – Railduino module with LAN connection (24V power supply) has consumption of approx. 120mA
(with all relays off) and consumption of approx. 230mA (all relays on). Therefore power consumption is approx. 6W max.
Minimal consumption can be lower then 2W (no LAN and all relays off).

6. "Digital inputs are not working well, I have to push the switch two times, what is the problem?"

There is bad settings in the virtual input command settings ‐ Use as digital input must be UNchecked!
Railduino 2.1 manual - operating instructions EN ver. 10/14/2019 DOWNLOAD
Railduino 2.0 manual - operating instructions EN ver. 09/18/2019 DOWNLOAD
Railduino LED manual - operating instructions EN ver. 11/03/2020 DOWNLOAD
Template for Loxone Config CZ/EN ver. 12/30/2021 DOWNLOAD
Compiled firmware for Railduino modules last ver. 02/08/2023 DOWNLOAD
Uncompiled firmware for Railduino modules GITHUB DOWNLOAD
CE Declaration of conformity CZ/EN ver. 1/1/2018 DOWNLOAD


Rated 4.93 on the scale 1 - 5 based on 9 customer reviews
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Bought one for loxone integration

Delivery took maybe 2-3 days but i was not expecting next day delivery.<br /> Product arrived very well packaged and it arrived in mint condition.<br /> <br /> After connecting power supply and lan it just works out of the box.<br /> Documentation is really good and many examples for loxone integration can be found. I also bought some sensors for 1wire and once connected they started sending their values straight away. I opted for UDP integration.<br /> <br /> I can recommend this product and wish i knew about this before i bought my loxone relays!

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Great product

If you are using Loxone, this is a great device to expand your inputs en relays. I'm so happy with it, I ordered a second one!<br /> <br /> (version 2.1)

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awesome devices

I have using 2 v1.3 railduino's in my home automation system for over 3 years without any Issues. <br /> They are coupled to my loxone system using UDP broadcasting over my dedicated home automation network.<br /> I can only recommend these!

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Only one problem, I want to have more of them

I'm using 4 Railduino's in my house and garden, for more then 2 years. without any problem. All togheter with Loxone. <br /> Like the title says there is a big problem, the system is so good and easy to inegrate that I always want to do more, ...<br /> <br /> I'm using it for:<br /> Controlling heating system 1Wire sensors in buffer tanks<br /> PWM (version 1.3) signals to the solar pump, <br /> Relay's for valves and three way valves<br /> blinds<br /> irrigation system<br /> Bath valves and three way valves to fill the bath<br /> switching on the pool filtering system and heating system<br /> and ofcourse Lights inside and outside.

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Good integration with loxone

Have been using this module together with Loxone miniserver and it works flawlessly.<br /> <br /> I'm using the module to control the following things in my home<br /> - Relay Outputs are used to control my ventilation unit<br /> - Relay Outputs are used to control my 230v lighting<br /> - Digital inputs are used for my standard push buttons<br /> - 1Wire is used together with DS18B20 sensors all around my house behind the light switches<br /> - 4 High Side Digital outputs are used to drive external 24V relays to control my underfloor heating.<br /> <br /> Everything is bound together via UDP and has never missed a button press or relay switch so I'm very satisfied. <br /> Thinking of buying more modules for the extension of my renovation project!

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