Pepperl Fuchs VBG-ENX-K20-DMD-EV Interface Module

Pepperl+Fuchs VBG-ENX-K20-DMD-EV Interface Module (AS-Interface → Ethernet Gateway)

 

The Pepperl+Fuchs VBG-ENX-K20-DMD-EV is not a simple interface module or I/O block.
It is a high-level industrial communication gateway used to connect AS-Interface (AS-i) field networks to Ethernet-based PLC/DCS systems.

Product Information

• Brand: Pepperl+Fuchs (Germany)
• Model: VBG-ENX-K20-DMD-EV (Part No. 254534)
• Type: AS-Interface Gateway (Industrial network converter)
• Function: AS-i → Ethernet/IP or Modbus TCP communication bridge
• Mounting: DIN rail (control cabinet installation)
• Housing: Industrial stainless steel housing (K20 series)

What it actually is

This device acts as a network translator, meaning:

• AS-Interface sensors/actuators → connect to gateway
• Gateway → converts signals into Ethernet communication
• PLC / DCS system → reads data over Ethernet

It supports:

• EtherNet/IP
• Modbus TCP/IP
• AS-Interface V3.0 master functions

System Role (Simple)

AS-i field devices (sensors, actuators)
→ VBG-ENX-K20-DMD-EV gateway (this unit)
→ Ethernet network
→ PLC / DCS controller

So it acts like a “protocol conversion bridge between fieldbus and Ethernet systems.”

Key Features

• 2 × AS-Interface networks support
• Ethernet communication (EtherNet/IP + Modbus TCP)
• Built-in diagnostics (LED + display interface)
• Duplicate address detection (AS-i safety check)
• Earth fault detection & noise monitoring
• Integrated web server for configuration
• Real-time industrial communication

Typical Applications

• Factory automation networks
• PLC-based distributed I/O systems
• Conveyor and machine control systems
• Sensor/actuator field networks
• DCS integration (Honeywell / Siemens / Foxboro systems)
• Safety and monitoring systems

Advantages

• Converts AS-i fieldbus to standard Ethernet
• Strong diagnostic capability (easy troubleshooting)
• High reliability industrial communication
• Supports modern PLC/DCS integration
• Reduces wiring complexity in large systems

Important Notes

• Not PLC CPU ❌
• Not I/O module ❌
• Not power supply ❌
• Not relay or signal block ❌
• It is a fieldbus communication gateway (protocol converter) ✔

Precautions

• Must match AS-Interface network specification (V3.0)
• Requires correct termination and addressing of AS-i slaves
• Ethernet configuration required in PLC system
• Sensitive to incorrect network topology
• Should be installed in grounded control cabinet