BIOS-IO-03 – LAN Ethernet relay output module with 8 relay outputs

What is the BIOS-IO-03 LAN Ethernet relay output module?

BIOS-IO-03 is a universal LAN Ethernet relay output module: an IoT module with 8 NO relay outputs for controlling signalling and simple actuators/output/control devices in machines, equipment, robots and controllers. It communicates over Ethernet using HTTP with data in JSON format and mounts on a 35 mm DIN rail. If you need to read signals as well as control, choose BIOS-IO-02 (4 inputs + 4 outputs) or BIOS-IO-01 (8 inputs).

Relay outputs OUT.1–OUT.8 are independent and isolated: each has its own pair of COM and NO terminals, NO contacts rated up to 2 A and a life of 5×10⁶ cycles. Each output can work statically (on/off) or in periodic (cyclic) mode, in which the relay switches itself on and off at set intervals, e.g. for flashing signals.

The module has two built-in, isolated 24 VDC sources, available on the AUX1 OUT and AUX2 OUT terminals (24 V / 40 mA each). In simple signalling setups, e.g. with signal lights, they let you do without an external power supply. LED indicators show the status of the outputs and the device.

The module connects to the LAN via 10/100 Mbit Ethernet (RJ45) and is configured in a web browser. Other systems, such as MES, SCADA or your own application, can read the output status through the module’s HTTP JSON API. The module is powered from the POWER INPUT terminals (12–36 VDC, SELV) or via Passive PoE through the RJ45 socket; power consumption is max. 1.5 W at 24 VDC. It has built-in reverse-polarity, thermal and overload protection.

The manufacturer provides a two-year warranty on the device and post-warranty service for 10 years from the date the device is placed on the market.

BIOS-IO-03 technical specifications

BIOS-IO-03 photos

Applications

• Status signalling: controlling lamps, beacons and signal towers, including in flashing (periodic) mode, powered from the built-in 24 V outputs.
• Remote switching of devices: simple actuators/output/control devices controlled from a server or system over the LAN.
• Integration with IT systems: controlling and reading output status over HTTP JSON from an MES, SCADA or your own software.
• Signalling in Scout MES: the module’s outputs can signal the states of machines monitored in Scout MES.
• Reading signals: if you also need inputs, see BIOS-IO-02 or BIOS-IO-01.

Example wiring

JSON data example

The current output status is returned by the GET /state/get request (no login required). The response is an array of 8 objects, one for each output OUT.1–OUT.8:

• isOn – the output is switched on;
• isActive – momentary relay state;
• isPeriodMode – periodic (cyclic) mode;
• counter – output switch-on counter.
• Rules: when isOn = true, in periodic mode isActive can be true or false (the relay switches on and off cyclically), and without periodic mode isActive is always true. When isOn = false, isActive is always false.

[
  { "isActive": true,  "isPeriodMode": true,  "isOn": true,  "counter": 13 },
  { "isActive": false, "isPeriodMode": true,  "isOn": true,  "counter": 12 },
  { "isActive": false, "isPeriodMode": false, "isOn": false, "counter": 8 },
  { "isActive": true,  "isPeriodMode": false, "isOn": true,  "counter": 7 },
  { "isActive": false, "isPeriodMode": true,  "isOn": false, "counter": 16 },
  { "isActive": false, "isPeriodMode": false, "isOn": false, "counter": 16 },
  { "isActive": false, "isPeriodMode": false, "isOn": false, "counter": 8 },
  { "isActive": false, "isPeriodMode": false, "isOn": false, "counter": 14 }
]

Controlling the outputs and configuring periodic mode require login; we do not publish the details.

Downloads

• BIOS-IO-03 datasheet (PDF)
• EC Declaration of Conformity No. 01/2024 – BIOS-IO-01…08 modules (PDF)

Frequently asked questions about BIOS-IO-03