D502
Ethernet-to-RS485/RS422 Gateway
Main Features
- Proprietary high-performance Ethernet communication stack; optimised for cyclic process data.
- Support for most common real-time Ethernet protocols including IPTCom, EtherNet/IP – CIP, TRDP and TRDP with SDTv2.
- 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.
Ethernet to RS485/RS422 with HDLC
The D502 is an easy to configure Ethernet-to-RS485/RS422 gateway. It provides up to two RS485/RS422 interfaces as well as up to two 10/100 Mbit Ethernet interfaces on D-coded receptacles. The Ethernet interfaces comply with IEEE 802.3 supporting 10BASE-T or 100BASE-TX, full duplex mode, auto-negotiation and auto MDI-X.
Variety of Product Options
The optional second Ethernet interface is intended to be used as a separate channel for remote diagnostic and maintenance purposes.
duagon gateways are available in two varieties: as a classic "gateway" with a standard, configurable gateway application, or as a "platform" to build a customer-specific application. For extended or very special requirements, the platform variety is accompanied by a development library that enables fast and efficient design of specific applications, either by duagon as a service or by the customer.
Extended Cybersecurity, Long-Term Availability
duagon offers different cybersecurity packages to harden the D502. The available packages include features such as secure communication for remote access, centralized user access management, secure event logging and secure firmware updates.
Its System-on-a-Chip (SoC) design based on a PLD ensures future portability and long-term availability.
For Rolling Stock Environments
The D502 is designed for harsh rolling stock environment and complies with the EN 50155, EN 50121, and IEC 61373 standards: it withstands -40 °C to +70 °C ambient temperature, complies with interruption voltage supply class S2, is coated against humidity and provides enhanced EMI and vibration robustness.
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).
Related Products
- General network support: IPv4
- Protocols
- Interface 0: TRDP, IPTCom, EtherNet/IP - CIP, CIP Scanner Light, TRDP with Safe Data Transmission (SDTv2), PROFINET, TCP/IP with UDP Sockets
- Interface 1 (optional): TRDP, IPTCom, EtherNet/IP - CIP, CIP Scanner Light, TRDP with Safe Data Transmission (SDTv2), PROFINET, TCP/IP with UDP Sockets
- Web Maintenance
- Alstom Web Maintenance
- Maintenance interfaces
- Web-based interface
- Command line interface (CLI)
- FTP
- duagon Basic Package
- duagon Enhanced Package
- Alstom Package
- This product includes interface options
- Ethernet: 2 × 10BASE-T/100BASE-TX, M12, D-coded, receptacle
- Serial: 2 × RS422/485 isolated, D-Sub, 9-pin, plug
- LED
- Status: initialization, system status
- Ethernet: link, activity
- Serial RS422/RS485: link, activity
- Earthing connection: M5 stud
- Supply voltage
- 24 V DC to 36 V DC nom. (EN 50155)
- 48 V DC to 110 V DC nom. (EN 50155)
- Power over Ethernet (PoE)
- Power consumption: 3 W max.
- Dimensions: (W) 31.6 mm, (D) 106 mm, (H) 120 mm
- Weight: 415 g
- Mounting
- DIN rail
- Wall/flat surface
- Ethernet
- Ethernet: IEEE 802.3-2012
- Fast Ethernet (FE): IEEE 802.3u
- Port-based network access control: IEEE 802.1X
- Link Layer Discovery Protocol (LLDP): IEEE 802.1AB
- Link Aggregation Control Protocol (LACP): IEEE 802.3ad
- Train Communication Network (TCN)
- Part 1: General architecture: IEC 61375-1:2012
- Part 2-3: TCN communication profile, Annex A: Train Real-Time Data Protocol (TRDP): IEC 61375-2-3:2015
- Part 3-4: Ethernet Consist Network (ECN): IEC 61375-3-4:2014
- Operating temperature: -40 °C to +70 °C, +85 °C for 10 min (EN 50155:2017, class OT4, ST1)
- Rapid temperature variations: EN 50155:2017, class H1, no requirements
- Storage temperature: -40 °C (EN 50155:2017) to +85 °C (EN 60068-2-2)
- Altitude: +1800 m max. (EN 50125-1:2014, class AX)
- Shock: 30 ms @ 50 m/s² (EN 61373:2010/AC:2017-09, vehicle body, cat. 1, class B)
- Vibration: 10 min @ 1.01 m/s² (functional) and 5 h @ 5.72 m/s² (long-life) (EN 61373:2010/AC:2017-09, vehicle body, cat. 1, class B)
- Power supply : Interruption of voltage supply: 10 ms (EN 50155:2017, class S2)
- Pollution degree: EN 50124-1:2017, class PD2
- Protective coatings: EN 50155:2017, class PC2 (Any PCB protected on both sides)
- Useful life: 20 years (EN 50155:2017, class L4)



