D501 - RS232-Ethernet Gateway

The D501 is an easy to configure Ethernet-to-RS232 gateway. It provides up to two RS232 interfaces (SER0 / SER1) as well as two 10/100 Mb/s Ethernet interfaces (ETH0 / ETH1). The Ethernet connectors comply with IEC 61076-2-101 (D-coded; female).

The Ethernet interfaces comply with IEEE 802.3 supporting 10BASE-T or 100BASE-TX, full duplex mode, auto-negotiation and auto MDI-X. Furthermore, the internal logic supports the "Ethernet on traction vehicles" standard IEC 61375-3-4.

The optional second Ethernet interface ETH1 is intended to be used as a redundant or as a separate channel for remote diagnostic and maintenance purposes.

duagon's gateways are available in two variants – as platform to build a customer-specific application or as gateway with a standard configurable gateway application. The platform variant is accompanied by a development library that enables fast and efficient design of customer-specific applications.

The gateway is integrated in a stainless-steel housing that can be mounted on a DIN rail or using M4 screws. The device can be powered directly from the vehicle battery or by Power over Ethernet (PoE).

The D501 is designed for the harsh traction environment and conforms to the EN 50155, EN 50121, and IEC 61373 standards in general, but particularly by:

-40 °C to +70 °C ambient temperature range

Interruption voltage supply class S2

Coating against humidity

Enhanced EMI and vibration robustness


  • Proprietary high-performance Ethernet communication stack; optimised for cyclic process data.
  • Support for most common real-time Ethernet protocols including TRDP, IPTCom and EtherNet/IP – CIP.
  • Optional redundant Ethernet interface.
  • duagon web server for remote diagnostics and firmware updates; possibility to implement customer-specific web pages.
  • Standard C development library to design customer-specific gateway application.