The original Alledio Thermostat had 230 VAC supply and built-in relays in the wall unit. It is discontinued. New projects use the Alledio Thermostat solution: the Room Controller on the wall plus the Relay MX Extender (MX-EXT5 / MX-EXT3) on a DIN rail in the cabinet.
What replaces it
- Wall unit: Room Controller, powered from 24 V (18–42 V DC / 24 VAC). No mains voltage behind the glass.
- Switching: Relay MX Extender switches the 230 VAC fan speeds and valves. It talks to the Room Controller over RS485 Modbus.
- Same use cases: 2-pipe and 4-pipe fan coils, 3-speed fans, heating and cooling valves, BMS integration over Modbus RTU.
MOQ starts at 1,000 pcs and is negotiable. 500 is possible when several Room Unit or Room Controller versions combined exceed 1,000.
Already have the 230 VAC thermostat installed?
Existing units keep working. For spares, firmware or a migration plan to the Room Controller + Relay MX Extender, contact us.
The four discontinued I/O models
| Model | I/O |
|---|---|
| 2 × AO | Power supply (230 VAC), Modbus RTU, three fan speed relays (1 / 2 / 3 / auto / off), 2 × 0-10 V analog output, 1 × NTC temperature sensor input |
| 2 × DO | Power supply (230 VAC), Modbus RTU, three fan speed relays (1 / 2 / 3 / auto / off), 2 × digital output, 1 × NTC temperature sensor input |
| 1 × AO, 1 × DO | Power supply (230 VAC), Modbus RTU, three fan speed relays (1 / 2 / 3 / auto / off), 1 × 0-10 V analog output, 1 × digital output, 1 × NTC temperature sensor input |
| 2 × relay H/C | Power supply (230 VAC), Modbus RTU, three fan speed relays (1 / 2 / 3 / auto / off), 2 × relay for heating / cooling, 1 × NTC temperature sensor input |
Back plates and I/O wiring
Archived specifications (discontinued 230 VAC thermostat)
For reference only. Do not use these values for new designs.
| Colors | White / Black / Silver |
| Measuring values | temperature, humidity, VOC (optional), CO2 (optional) |
| Network | RS485 Modbus, RTU, half-duplex, baud rate 9600 kbps, 19200 kbps, 38400 kbps, 57600 kbps, 115200 kbps. parity: non , even or odd. RS485 bus load: ¼ unit load according to RS485 standard (max. 128 devices). |
| Wi-Fi | 2.4 GHz Wi-Fi (802.11 b/g/n) STA mode, https, TCP, UDP (currently only update is supported) |
| Bluetooth | Bluetooth 5 (LE) ready. Bluetooth protocol can be implemented according to the client specifications. Document of the data protocol, GATT Services and characteristics must be provided. |
| Power Supply Voltage | 230 VAC |
| Inputs | Power Supply / Modbus / Relays: Fan Speed (1 / 2 / 3 / auto / off) / Relays: Heating / Cooling / Optional: 2 × AO / 2 × DO / 1 × AO, 1 × DO / External temperature sensor (NTC) |
| Built-in Sensors | temperature: digital sensor, NTC (optional) / humidity: digital sensor / air quality (optional): digital sensor / CO2 (optional): digital sensor |
| Measuring ranges | temperature: -40 - 125 °C at 25°C / humidity: 0 - 100 %RH / air quality: 1 - 500 VOC index points, Ethanol in clean air: 0 - 1000 ppm |
| Accuracy | temperature: ± 0.2 °C (at 0-60°C) / humidity: ± 1.8 %RH (10-90% at 25°C) / air quality: device to device variation: VOC Index Points < 15%; repeatability: VOC Index Points < ± 5% / CO2: ±100.0 ppm ±10.0 %m.v. |
| Operating range | Temp: 25°C / Humidity: 1.8 %RH (10-90%) / Air quality: 5-30°C, 0 -80%RH |
| Clock | RTC Real Time Clock |
| Display | LCD Display size 3.5'' with 480 x 320 at, with capacitive touch, brightness sensor for automatic illumination control, |
| Casing | ABS, scratch-resistant glass |
| Ingress Protection | IP20 according to EN 60529 |
| Ambient condition | -10..+50 °C, max. 85% rH non-condensing |
| Product dimensions | 98 mm × 98 mm × 14 mm |
| Product weight | 150 g |
| Package dimensions | 98mm x 98mm x 18mm |
| Mounting | Flush mounted with standard EU box (Ø=60 mm) |
| Standard | CE, EN 60730-1, EN 60730-2-9, EN 300 328 V2.2.2 |
| Warranty | 1 year. |
| Security | 5 years* of security updates. Optional:additional cost apply. |
| Communication-section / address | 1 - 247 / Factory default: 1 |
| Communication-Interface | RS485 |
| Communication-Protocol | Modbus-RTU |
| Baud Rate | 4800 kbps / 9600 kbps / 19200 kbps / 38400 kbps / 115200 kbps / Factory default: 9600kbps |
| Parity | no parity / odd parity / straight parity (optional) / Factory default: no parity |
| Data | 8 bit |
| Stop bits | 2 bit |
Next step
See the Alledio Thermostat page for the current solution, the bundle and which version you need.
