myIO Server V4 Opta
Certified industrial hardware in your cabinet. Built on Finder’s industrial controller, this myIO expands to a large system and talks to KNX, DALI, DMX and Modbus devices.

Who is it for?
- You are building a new home and want certified industrial hardware in the cabinet.
- You want full control, or only part of it, even just heating and cooling.
- Expanding later matters to you: with more expanders, and with KNX, DALI, DMX or Modbus devices.
What you get
Industrial hardware, small footprint
Built on Finder’s Opta industrial controller (PLC): a certified device designed for industrial use (CE, cULus, ENEC). It takes only 4 modules on the DIN rail and runs on 12–24 V.
Right on the controller
3 freely usable relays and 8 analogue inputs are already on the controller. The analogue inputs take sensors with a 0–10 V signal; push buttons and switches go to the Expander 16.
Expands to a large system
Up to 10 Expander 16 units on a single bus cable, for 160 inputs and 160 outputs in total. The expanders can sit away from the controller, and the temperature sensors connect to them too.
Heating does not stop
If the connection to the controller is lost, the Expander 16 keeps running with its own settings, so for example the heating does not stop.
KNX, DALI, DMX, Modbus
With bridges, KNX devices, DALI and DMX lighting, and Modbus devices such as energy meters become part of the system.
Access from anywhere
It connects by cable or Wi-Fi, and through myIO Cloud you reach it from anywhere over an encrypted connection.
- 1 year of myIO Cloud as a gift
- 10-year warranty on the boards myIO makes (main boards, expanders); the Finder Opta carries the manufacturer’s warranty.
- Remote software updates: you can also get the new version by email and upload it yourself
Bridges in beta
The bridges are in beta and become available one by one. For the Modbus Bridge we welcome requests and ideas: which device would you connect?
For professionals
Basics and hardware
- Controller hardware
- Finder Opta
- Processor
- dual-core, 480 + 240 MHz
- Memory (RAM)
- 1 MB
- Maximum outputs / inputs
- 160 / 160
- Temperature sensors (DS18B20)
- 40, via Expander 16
- 0–10 V analogue input
- 8
- Network
- Ethernet + WiFi
- Sockets
- 4
- Storage
- internal flash
- Crypto chip
- yes
- Power supply
- 12–24 V DC
- Mounting (DIN rail)
- 4 modules
- Service display
- yeson the Expander 16
Expanders and bridges
- myIO Expander 16 (RS485)
- yes
- Expander standalone mode
- yes
- KNX Bridge
- beta
- Modbus Bridge
- beta
- DMX Bridge
- beta
More details
- Type
- Finder Opta WiFi industrial PLC (8A.04.9.024.8320) with myIO firmware
- Certifications
- CE, UKCA, cULus, ENEC (the Finder Opta’s certifications)
- Built-in inputs and outputs
- 4 relays (1 is the Ready relay, the system’s heartbeat; 3 freely usable), 8 analogue inputs (0–10 V only, no digital signals; wall switches go to the Expander 16)
- Expansion
- Up to 10 Expander 16 units on the RS485 bus: 160 inputs, 160 outputs. The limit may rise after measurements.
- Bridges (beta)
- KNX (compatible, not certified) · DALI (64 addresses and 16 groups per line, built-in bus power) · DMX512 (64 fixtures per board, on the Modbus Bridge hardware) · Modbus RTU (tested with SDM630 so far)
- Shared capacity
- Every DALI address and DMX channel takes one output channel. The Opta has 160 in total today, shared with the Expander 16 units (16 each).
- Standalone mode
- If the bus fails, the Expander 16 keeps running its own program: input → output, thermostat, protection, group.
- DIN rail space
- Opta 4 modules, Expander 16 6 modules, bridges 3 modules each
- Software updates
- Remotely, over the network; the new firmware can also be requested by email and uploaded by the owner.
We will tell you when it is available
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