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Leroy Automation

Automation Products for Harsh Environments

35 boulevard du Libre Echange,
31650 Saint Orens France

Rail automation components

For nearly 35 years, LEROY AUTOMATION has been designing, manufacturing and integrating rail automation components for implementing train control and management systems (TCMS), computer-based train control (CBTC) and signalling solutions (ETCS).

LEROY AUTOMATION offers commercial-off-the-shelf (COTS) products and turnkey bespoke design and integration services, covering a full range of control, communication, monitoring management and diagnostics in train and transit operations. These range from speed sensing and automatic door control to heating, air conditioning, ventilation, brakes, fault indication, lighting control and traction power-pack automation.

The company holds ISO 9001: 2008 and IRIS Rev.02 (international railway industry standard) certifications.

LEROY AUTOMATION has been accredited as a sustainable and best-in-class corporate social responsibility practices company by ECOVADIS.

Embedded PLC for train control, communication, management and diagnostic systems

LEROY AUTOMATION has manufactured more than 60,000 RIOM products deployed worldwide for use in railway automation applications under the most extreme conditions as vehicle control units (VCU), remote I / Os (RIO) and communication gateways.

RIOM is an EN50155-compliant embedded programmable logic controller (PLC) designed to be integrated into train control and management systems (TCMS, CBTC and ETCS). Compatible with any train network interfaces (RS232, RS485 / RS422, CAN2.0, MVB, LonWorks, Ethernet), RIOM is a very versatile and flexible platform thanks to its multiple communication ports.

Featuring very powerful processing capabilities, the RIOM is well-suited for real-time automation functions, as well as supervising train functions and operations or drive communication gateways on any communication networks and protocols, such as TCP and UDP sockets, Ethernet / IP – CIP, IPTCOM, MODBUS, PROFIBUS, PROFINET and IEC 61375 TRDP.

Our PLC products can be programmed using the IEC 61131-3 STRATON workbench (PLC open-compliant), or using the C / C++ board support package for real-time Linux OS.

Ethernet-based remote I / O terminal for on-board rail and transit rolling stocks

The BRIO product range is an EN50155-compliant remote I / O module for Ethernet-based networks embedded into railway applications.

The specifications include:

  • Size-6U rack-mountable or standalone panel-mount solution
  • Full range power supply from 24Vdc to 110Vdc (train battery voltage-compliant)
  • Ethernet (M12) communication channel supporting the following protocols: Ethernet / IP – CIP, UDP or Modbus / TCP.
  • I / O configurations, including 40 digital inputs and 10 digital outputs; 32 digital inputs and 16 solid-state relay outputs; two analog voltage (±10Vdc) and two analog current type inputs (±20mA); and one analog output: 0Vdc-10Vdc and 0mA-20mA
  • Optional: RS485 / CAN2.0 communication port

Automation of electrical traction power substations

The LT ENERGY product range is suitable for high-voltage switch management in electrical power substations. Input / output blocks are specially designed to control circuit-breakers, switches and isolating switches.

The software programming tool is based on the IEC 61131-3 STRATON workbench from COPA-DATA.

The main technical specifications are:

  • 1MB data storage
  • Embedded web server
  • FTP, NTP, and SNMP V3
  • MODBUS master and slave configurations
  • Ethernet / IP – CIP
  • IEC 61850 / IEC 60870
  • DNP 3.0 (Level 2)

The secure input / output block can control four high-voltage switches. The command of the open relay outputs is four times redundant.

Railway references

RIOM products were embedded in high-speed trains, passenger trains, light rail vehicle, metros and transit rolling stocks, as well as locomotives. The high-speed trains include the Alstom AGV world rail speed record train (574.8km/h) and NTV (Italia). The passenger trains include PRASA in South Africa, West Coast Main Line and Juniper trains in the UK, Fortaleza in Brazil, Cercanias in Spain and DB Frame in Germany, as well as trains in Stockholm, Sweden; Copenhagen, Denmark; and Tage, Portugal.

The tramways include Jerusalem, Lyon in France and Nantes in France, as well as major international cities such as Istanbul and Ottawa.

The metros include Budapest, Barcelona, Helsinki and Rennes with Siemens Mobility. Locomotive central control units have been deployed in Russia, Azerbaijan, Kazakhstan, and Middle-East countries.

LEROY AUTOMATION’s international projects include:

  • Metro cars and driverless automatic metro cars in international capital cities and regional towns
  • Suburban trains for the passenger rail agency of South Africa (PRASA)
  • Regional trains (Regiolis) through many French regions
  • Light rail vehicles (tram-train) for Ottawa in Ontario, Canada
  • Tramway cars (Citadis) for European cities
  • Locomotives (EP20, 2ES5, KZ8) for Russia and Kazakhstan
  • High-speed trains (TGV Euroduplex, AGV) for SNCF and RFF

LT energy has been used by the 25kV French high-speed train lines (world FIP version) and the South Korean high-speed train network.

Railway Safari for LEROY AUTOMATION’s On-board Train Controls

LEROY AUTOMATION, a leading railway engineering design company and specialized manufacturer of on-board automation systems for train control monitoring systems (TCMS) will be exhibiting at Africa Rail 2018 Rail Conference and Exhibition on 12 and 13 June 2018 at the Sandton Convention Center in Johannesburg, South Africa.

LEROY AUTOMATION to Exhibit at Mass-Trans Innovation Japan

LEROY AUTOMATION, a leading railway engineering design company and specialized manufacturer of onboard automation systems for train control monitoring systems (TCMS), and control-command solutions for MV/LV power substations will be exhibiting at Mass-Trans Innovation Japan from 29 November to 1 December 2017 at the Makuhari Messe in Chiba, Japan.


LEROY AUTOMATION will exhibit its most innovative products to integrate Train Control and Monitoring Systems (TCMS) and compact modular automation solutions at the APTA EXPO 2017.

Leroy Automation to Showcase Highly Reliable Rail Automation Solutions at SIFER 2017

LEROY AUTOMATION will exhibit its comprehensive range of products and solutions to architect smart Train Control and Monitoring Systems (TCMS) and rugged modular automation solutions at SIFER 2017, France's premier railway industry trade fair, from 21 to 23 March. On this occasion, we are pleased to invite you to visit LEROY AUTOMATION on the MIPIRAIL regional cluster hall 2 - stand 330.

Leroy Automation Gets On-Board New Generation of Driverless Metros

Leroy Automation, a leading manufacturer of automation systems for on-board train and rail signalling control monitoring systems, has been awarded a major contract by Siemens to supply the vehicle control and monitoring system (VCMS) architecture for their newest generation of automated passenger transportation platforms.

Inaugural Nippon Show for Leroy Automation

LEROY AUTOMATION, a leading manufacturer of on-board automation systems for train control monitoring systems (TCMS), and control-command solutions for traction and auxiliary power substations, will be exhibiting at Mass-Trans Innovation Japan 2015 from November 11-13, 2015 at the Makuhari Messe convention centre in Chiba, Chiba Prefecture, Japan.

SATURN: SIL2-Certified Fail-safe Remote I/O System Architecture for Trains

LEROY AUTOMATION, a leading manufacturer of on-board automation systems for train control and management systems (TCMS), partnered with CLEARSY, a specialist in railway safety-critical systems, to develop and market SATURN, a cutting-edge SIL2/SIL4 fail-safe controller and remote I/O platform for train control, propulsion and rail signalling system architectures.

Leroy Automation Commits to a Greener Approach

Leroy Automation, a French advanced engineering design house and manufacturer of electronic embedded transit and railway systems, automation products for the electrification of transport & transit networks, and control-command equipment designed for harsh industrial and military environments, decided to adopt an Eco-responsible™ corporate policy, in order to reduce its ecological and environmental footprint.

Leroy Automation to Exhibit at SIFER 2015

Leroy Automation, a leading designer and manufacturer of embedded electronic systems for on-board rolling stock vehicles, automation solutions for electrification networks and railway control equipment, will be exhibiting at SIFER 2015, France's premier international rail industry event, from 24 to 26 March 2015 in Lille Grand Palais Exhibition Centre.

Leroy Automation Confirms Its Localization in North America

For more than 30 years, Toulouse-based company Leroy Automation has been designing and manufacturing embedded electronic systems for railways, automation solutions for transportation electrification networks, as well as railway, industrial and military control equipment.

Leroy Automation Heads to EXPO 1520 in Moscow, Russia

Leroy Automation, an established European manufacturer and supplier of Train Control Monitoring Systems, will be exhibiting at EXPO 1520, the 4th International Rail Salon of Engineering and Technologies.

Leroy Automation Showcases Latest EN50155 Systems At SIFER 2013

Leroy Automation will be participating to SIFER, the 8th International Exhibition of Rail Technology. This event will be held from March 26th to 28th, 2013 in Lille Grand Palais Exhibition Centre. Leroy Automation's exhibiting booth will be hosted on the MipyRail Cluster pavilion in Hall 2 - Stand No. 330.

Meet Leroy Automation at Exporail (Stand 113 – Hall 1)

After the successful InnoTrans 2012 trade fair, Leroy Automation is pleased to announce that its venue at Exporail 2012, the 6th International Railway Technology Exhibition in Moscow, Russia. This three-day event runs from 7 November 2012 and you will be able to visit Leroy Automation and its local distributor FIORD in the Hall 1 at the stand number 113.

Visit Leroy Automation at InnoTrans (Booth 3.2 / 210-J)

Leroy Automation is pleased to announce that it will be exhibiting at InnoTrans 2012 in Berlin, Germany. The event runs from 18 to 21 September 2012 and you will be able to visit Leroy Automation in hall 3.2 at stand number 210-J.

Leroy Automation (HQ)

35 boulevard du Libre Echange

31650 Saint Orens


Leroy Automation (North American Office)

355 Recollets street

H2Y 1V9