Railway power distribution


The high capacity utilization of railway network segments up to the highest load limit makes maximum availability of energy supply critical. In order to best prevent breakdowns and minimize downtimes, systems must be monitored and controlled centrally.



Railway power distribution


Retrofitting of
existing assets

The SG-gateways enable easy retrofit of existing switchgear and other components to your protocol of choice.


Easy configuration

A user focused interface with no need for programming knowledge or external software makes this the perfect multitool in the field of communication within energy distribution applications.


Technical service

If you need help with the energy protocol configuration, our excellent technical service department is at your side during the whole project.

SG-gateway Core

Serial to Ethernet-based communication

The SG-gateway supports the communication protocols used in the energy sector, including IEC60870-5-104, DNP3 and IEC61850 and enables connectivity for energy devices between Ethernet-based and serial-based communication networks. On top of that the simultaneously usable OPC-UA and MQTT functionality empower direct integration into the companies’ cloud-based applications.

In addition to the IEC and DNP3 protocols, other electric equipment in the field can also be connected via Modbus TCP and RTU. Optionally, the SG-gateway is also available with a 3G (UMTS) or 4G/LTE modem as an additional communication channel for all TCP-based protocols.

The optional WLAN interface can be used for configuration but also for connection to control rooms. As the WLAN port supports all Ethernet-based protocols this also enables the connection of wireless sensor technology (e.g. Modbus TCP via WLAN) as well as the wireless connection of remote IEDs via IEC 61850 to the SG-gateway.

Order codes: ASG3015, ASG3014, ASG3012, ASG3010, ASG3008, ASG3006, ASG3004, ASG3002, ASG3000, ASG3070, ASG3036-C

Ixxat SG-gateway Core

Features & benefits

  • Easy way to convert between Ethernet-based and serial communication
  • Supports several communication protocols (IEC61850, IEC60870-5-104, DNP3, Modbus, OPC-UA, MQTT)
  • Connectivity via Ethernet or via optional wireless modems: WLAN, 3G (UMTS) or 4G (LTE)
  • Easy web-based configuration using any standard browser
  • Onboard WebPLC for easy data conversion and control functions
  • Robust metal housing for stand-alone operation with DIN rail mounting
  • Global technical support and consulting services
  • Range of cybersecurity features including password protection, user management and OpenVPN
  • Continuous software maintenance by HMS, devices can be upgraded in the field
  • Easy export and import of configuration to ease volume installations

Additional interfaces


  • 10/100 Mbit/s
  • DHCP server
  • SNTP
  • NAT routing
  • SNMP manager


  • Selectable RS-232/485
  • Serial baud rate 300 bps - 187,5 kbps


  • OpenVPN client
  • TLS version 1.3 data encryption
  • Integrated Firewall
  • Password protection with password policy
  • Support for user roles
  • Root access authentication
  • Usage of standard ports for easy integration into firewalled environments
  • Encrypted and signed files for firmware-updates
  • Password protection for configuration export & import


  • Supports Modbus TCP Client/Server
  • Connects up to 128 server devices and supports 4096 values


  • Supports Modbus RTU Master/Slave
  • Connects up to 128 serial Modbus RTU slave devices and supports up to 4096 values

DNP3 (optional)

  • Outstation: 1 TCP link, up to 4 local/master links
  • Up to 4096 data objects (each data object with value, quality and timestamp)


  • Client/Server
  • Goose Publisher/Subscriber
  • Up to 4096 data objects (each data object with value, quality and timestamp)
  • 32 server devices supported in Client configuration

IEC60870-5-104 (OPTIONAL)

  • Client/Server
  • Up to 4096 data objects (each data object with value, quality and timestamp)
  • 32 server devices supported in Client configuration
  • Support for IEC60870-5-104 redundancy according to Norwegian User Convention

Wireless LAN (Optional)

  • All Ethernet-based protocols of the SG-gateway can be used via WLAN
  • WLAN module according to IEEE 802.11 a/b/g/n
  • Dual-band capable (2.4 GHz, 5 GHz)
  • WLAN client
  • Prepared for WLAN access point functionality – will be available via firmware-update
  • Supports WPA/WPA2-PSK encryption
  • SMA antenna socket with foldable WLAN antenna


  • Send and receive SMS
  • In addition, all Ethernet-based protocols of the SG-gateway can be used via 4G/LTE:  E.g. for remote access to the control room via IEC60870-5-104 or IEC61850
  • Uplink up to 5 Mbps
  • Downlink up to 10 Mbps
  • Mini SIM (2FF)
  • Variant for Europe: 
    - 2G bands: B3/B8 (1800/900 MHz)
    - 3G bands: B1/B3/B8 (2100/1800/900 MHz)
    - 4G bands: B1/B3/B7/B8/B20/B28A (2100/1800/2600/900/800/700 MHz)
  • Vairante for North America: 
    - 3G bands: B2/B4/B5 (1900/1700/850 MHz)
    - 4G bands: B12/B14/B4/B2/B5/B13/B66/B71 (700/700/1700/1900/850/700/1700/600 MHz)


  • The 3G/UMTS modem is only available for a limited time. We recommend the 4G/LTE modem for all new installations in Europe and North America.
  • Send and receive SMS
  • In addition, all Ethernet-based protocols of the SG-gateway can be used via 3G/UMTS:  E.g. for remote access to the control room via IEC60870-5-104 or IEC61850
  • GSM/GPRS, four frequency bands: 850/900/1800/1900 MHz
  • UMTS, seven frequency bands: 800/850/900/AWS 1700/1900/2100 MHz
  • Mini SIM (2FF)


  • Micro Embedded Device Server Profile
  • UA-TCP, UA-SC, UA-Binary protocol and encoding
  • Up to 128 groups, 4096 values
  • Up to 4 concurrent client sessions


  • Client version 3.1 and 3.11
  • Flexible for own definition of payloads
  • Last will, QoS, Keep alive interval
  • TLS encryption

Configuration interface

The application logic can be realized on the device either using the integrated graphical web editor or by using a predefined configuration loaded to the device. The graphical web editor is a very intuitive and easy to use interface to program software applications and configure the gateway. No engineering tools are required, and it can easily be accomplished by service technicians.


Web-based configuration tool

Technical specifications

Dimensions  (L•W•H)
79 x 46 x 107 mm with included connectors plugged
Weight  350 g or 0.8 lbs
Operating temperature 0 to +55 °C  or  +32 to +131 °F
Enclose material
Powder-coated, aluminum-zinc hot-dipped steel, RAL 7021
Power supply 24 VDC (+/- 15%); Weidmüller BL 3.50/03 (connector included)
Current consumption
100 mA at 24 V DC / with modem: 140 mA at 24 V DC
Ethernet interface 1x 10/100 BaseT RJ45, link and traffic LED indicators
Serial interface 1 x RS232/RS485 (selectable), Weidmüller BL 3.50/08 (included)
SD-card microSD card SD/SDHC, push/push slot
Optional WLAN Variants with dual-band WLAN interface.
A suitable WLAN antenna is included in the scope of delivery.
Optional cellular modem Variants with 3G three-band UTM modem 
or 4G/LTE modems for Europe or North America 
Antenna for SMA socket not included. In the accessories section you will find the matching antenna.
Note: The 3G/UMTS modem is only available for a limited time. We recommend the 4G/LTE modem for all new installations in Europe and North America.
Mechanical rating IP20, NEMA rating 1
Mounting DIN-rail (EN 50022 standard)
Always included protocols  Modbus TCP Client/Server, Modbus RTU Master/Slave, OPC-UA Server, MQTT Publisher/Subscriber, Kolibri (for HMS Hub connectivity)
Optional protocols  IEC61850 Client/Server, IEC60870-5-104 Client/Server, DNP3 Outstation
Config method  Integrated webserver 
Certifications CE, cUL, , KC*, FCC**
* KC only for variants without wireless modem (3G/4G/WLAN)
** FCC for devices with wireless modem (3G/4G/WLAN)

Technical services

The Ixxat Energy Technical Services Team is always on your side. We offer different service levels to fit your needs and fill the knowledge gaps you have for your next project!

Learn more...

Ordering information

Order Code  ASG3036-C ((IEC60870-5-104 client/server + IEC61850 client/server + WLAN)
ASG3021 ((IEC60870-5-104 client/server + IEC61850 client/server + 4G/LTE for North America)
ASG3020 ((IEC60870-5-104 client/server + IEC61850 client/server + 4G/LTE for Europe)
ASG3015 (IEC60870-5-104 client/server + IEC61850 client/server + DNP3 Outstation + 3G) Only available for a limited time.
Additional Order Codes  ASG3014 (IEC60870-5-104 client/server + IEC61850 client/server + DNP3 Outstation)
ASG3006 (IEC60870-5-104 client/server + IEC61850 client/server)
ASG3004 (IEC61850 client/server)
ASG3002 (IEC60870-5-104 client/server)
ASG3070 (4G/LTE for Europe)
ASG3000 (Entry-level device without any options) 
Included components 4 GByte microSD memory card 
Power connector (Weidmüller BL 3.50/3) 
Serial connector (Weidmüller B2L 3.50/8)
CAN connector (Weidmüller B2L 3.50/04)
For models with WLAN: Dual-band bend antenna included
(power supply and 3G/4G antenna NOT included)
Accessories ISG9500-C (3G/4G antenna with SMA connector)
Required software Ixxat IP configurator (for IP configuration - Freeware) 
Downloadable under Support | Files and Documents
Technical services             From getting started up to full support during the entire project. Our 
different service levels cover all your needs.

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Ixxat SG-gateway – for all areas of railway energy management!

Fields of application

  • Retrofitting, e.g. enabling remote operation of so far manually operated switchgear
  • Remote control and monitoring for overhead power distribution
  • Digitalization of infrastructure power distribution
    - Signaling and traffic control
    - Stations
    - Service and maintenance plants

Designed for your needs

  • Adaptation and processing of data using a graphical programming interface
  • Simplified protocol configuration by using wizards
  • Fast installation and adjustment of parameters in the field since no additional tools are required
  • Fast plug & play installation after configuration
  • Support of the Norwegian User Convention (NUC)
  • A range of features, including OpenVPN and password protection, to keep your data and network secure


Diagram - Retrofitting of circuit-breakers



SG-gateway service offer

Based on our many years of experience in the field of energy and industrial communication we offer a comprehensive service portfolio to our customers.

How-to videos

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SG-gateway downloads

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Energy Brochure

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