HD67861-5-A1-4B – Industrial IO-Link Master / Modbus Slave Converter with 4 IO-Link Class B Ports

HD67861-5-A1-4B Converter – IO-Link Master with four Class B ports and Modbus RTU Slave support.

The HD67861-5-A1-4B is a high-performance industrial IO-Link Master / Modbus RTU Slave converter designed for applications requiring efficient integration of IO-Link devices with automation systems based on the Modbus RTU protocol. It enables seamless communication between modern IO-Link sensors, actuators and intelligent modules, and Modbus-based PLCs, HMIs, SCADA systems and industrial PCs.

This model belongs to the HD67861-A1 family and has been specially configured to support four IO-Link Class B ports. Class B ports provide additional AUX power delivery, making them suitable for more demanding IO-Link devices such as actuators, proportional valves, drives, grippers, power-consuming sensors and process modules. This gives the HD67861-5-A1-4B a unique advantage in systems that combine monitoring, diagnostics and device control within one communication framework.

The converter fully complies with the IO-Link standard IEC 61131-9, allowing bidirectional data exchange including Process Data, Parameters and Events. It ensures quick access to device configuration, diagnostic information, status monitoring and real-time sensor values. As a Modbus RTU Slave device, it exposes all relevant IO-Link data through Modbus registers accessible by any Master device.

Four IO-Link Class B ports – ideal for actuators and high-power devices

The key feature of the HD67861-5-A1-4B is the presence of four IO-Link Class B ports. Class B ports provide an independent AUX power supply, making them suitable for actuators and devices requiring more energy than is available on Class A ports. This makes the converter a perfect choice for applications requiring combined sensing and actuation capabilities.

Each IO-Link port supports COM1 (4800 bps), COM2 (38 400 bps) and COM3 (230 400 bps) communication speeds, providing compatibility with both simple sensors and advanced high-speed IO-Link modules.

Modbus RTU Slave – seamless integration with PLC and SCADA

The device communicates with the control system using Modbus RTU Slave over an RS485 interface (3-pin terminal block). It supports transmission rates of up to 115200 bps. This ensures full compatibility with nearly all PLCs, industrial controllers and SCADA systems on the market.

Using the SW67861 configuration software, IO-Link data can be mapped to Modbus registers. Engineers can define which variables should be made available to the Modbus Master and adjust the register structure to match their system architecture.

Industrial-grade housing and installation

The HD67861-5-A1-4B is housed in a compact Type A DIN-rail enclosure, designed for installation on standard 35 mm DIN rails. Screw terminal connectors ensure secure, vibration-resistant wiring, suitable for demanding industrial environments. The compact dimensions of 120 × 23 × 107 mm help save valuable space inside automation cabinets.

The converter operates reliably within a wide temperature range of −40°C to +85°C, enabling use in outdoor installations, high-temperature zones, machinery, mobile systems and harsh industrial conditions. The dual-range power supply (8–24 V AC and 12–35 V DC) ensures broad compatibility with different cabinet power architectures.

Typical applications

• Integration of IO-Link sensors and actuators into Modbus RTU systems
• Advanced production lines requiring multi-channel IO-Link communication
• Process automation and control of high-power IO-Link devices
• Diagnostics and real-time monitoring through IO-Link
• Robotics, packaging machinery, assembly lines
• Industrial systems requiring IO-Link Class B power output

Technical specifications

• IO-Link: 4× IO-Link Class B (5-pin terminal blocks)
• Modbus RTU: RS485 (3-pin terminal block)
• Ethernet: 1× RJ45
• IO-Link speeds: 4800 / 38400 / 230400 bps
• Modbus speeds: up to 115200 bps
• Power supply: 8–24 V AC, 12–35 V DC
• Operating temperature: −40°C to +85°C
• Dimensions: 120 × 23 × 107 mm
• Weight: approx. 200 g
• Software: SW67861
• Order code: HD67861-5-A1-4B

The SW67861 configuration software for the HD67861-5-A1-4B is available here: DOWNLOAD

If you need assistance selecting the right IO-Link Master variant or want to confirm compatibility with your system, our technical team is ready to help.