BIOS-IO-02 – LAN Ethernet I/O module with relay outputs: 4 isolated digital inputs + 4 relay outputs

What is the BIOS-IO-02 LAN Ethernet I/O module with relay outputs?

BIOS-IO-02 is a universal IoT module for reading digital signals and controlling simple actuators/output/control devices in machines, equipment, robots and controllers. It combines 4 isolated digital inputs with galvanic isolation and 4 independent NO relay outputs. It communicates over Ethernet using HTTP with data in JSON format and mounts on a 35 mm DIN rail. If you only need to read signals, choose the BIOS-IO-01 module with 8 digital inputs.

The type of each input is set with a DIP switch: a 0–24 V voltage input or a dry-contact input with built-in 24 VDC biasing, e.g. for volt-free contacts and contactors. The inputs can also work as pulse counters at frequencies up to 3 kHz. The inputs are optically isolated (input current typ. 2.0 mA, isolation withstand 2000 VDC) and share a common COM.A bank, and each channel has a pair of COM.A and IN+ terminals.

The relay outputs are isolated, with 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. LED indicators show the status of the inputs, 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 status of the inputs and outputs 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. An auxiliary 24 V / 40 mA output is available on the AUX OUT terminals.

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-02 technical specifications

BIOS-IO-02 photos

Applications

• Status signalling: controlling lamps, beacons and signal towers through the relay outputs, including in flashing (periodic) mode.
• Remote switching of devices: simple actuators/output/control devices controlled from a server or system over the LAN.
• Reading machine status with simultaneous control: the inputs read run, alarm or stop signals, while the outputs control signalling or devices at the same location.
• Contacts, contactors and voltage signals: dry-contact inputs for volt-free contacts and 0–24 V voltage inputs.
• Integration with IT systems: reading input and output status over HTTP JSON from an MES, SCADA or your own software.
• Machine monitoring in Scout MES: BIOS-IO-02 lets you connect conventional machines, which cannot provide data directly over the LAN, to Scout MES.
• Welder monitoring with BIOS-CT-01: the BIOS-CT-01 current-draw detection sensor works with the inputs of the BIOS-IO-02 module.
• More inputs, no outputs: if you only need to read 8 signals, see BIOS-IO-01.

Example wiring

JSON data example

The current status of the inputs and outputs is returned by the GET /state/get request (no login required). The response is an array of 8 objects: positions 1–4 are the inputs, positions 5–8 are relay outputs OUT.5–OUT.8.

• Inputs: isActive – whether the input is currently active; counter – input activation counter.
• Outputs: isOn – the output is switched on; isActive – momentary relay state; isPeriodMode – periodic (cyclic) mode; counter – output switch-on counter.
• Rules for outputs: 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,  "counter": 13 },
  { "isActive": false, "counter": 12 },
  { "isActive": false, "counter": 8 },
  { "isActive": true,  "counter": 7 },
  { "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 }
]

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

Downloads

• BIOS-IO-02 datasheet (PDF)
• EC Declaration of Conformity No. 01/2024 – BIOS-IO-01…08 modules (PDF)

Frequently asked questions about BIOS-IO-02