Leroy Automation
Automation Products for Harsh Environments


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.

Cityringen Metro, Copenhagen, Denmark
Cityringen Metro is a 15.5km underground circle line being developed as an extension to the Copenhagen Metro.
Rolling Stock Technology Accelerated by IEC 61131-3 STRATON PLC
LEROY AUTOMATION, a global leader and manufacturer of reliable rail automation components and on-board train control and monitoring systems (TCMS) architect, extends its software strategy with the IEC 61131-3 STRATON solution.
28 May 2020Leroy Automation at Mass Trans Innovation Japan 2019
Leroy Automation will highlight its latest EN 50155-compliant automation products and railway solutions for safety-critical applications at Mass Trans Innovation Japan 2019.
18 November 2019On-Board Train Monitoring Systems and Train Control Systems at Railway Interchange
Train control and monitoring system (TCMS) provider Leroy Automation will demonstrate its cutting-edge EN 50155-compliant products and high-end safety critical solutions at Railway Interchange (RI) 2019.
10 September 2019Leroy Automation Showcases Rail Control Solutions at Eurasia Rail
LEROY AUTOMATION will be exhibiting at the eighth edition of EURASIA RAIL Turkey, taking place at Fairizmir between 10-12 April.
8 April 2019Train Control and Monitoring Systems and Fail-Safe Rail Automation Showcase
LEROY AUTOMATION will demonstrate its latest innovations and SIL2 commercial-off-the-shelf (COTS) remote input/output modules (RIOM) for three days at the 11th international exhibition of railway technology: SIFER 2019.
14 March 2019LEROY AUTOMATION Highlights Train Control Solutions at InnoTrans 2018
LEROY AUTOMATION will be exhibiting at InnoTrans 2018, the world’s largest trade fair for transport technology.
3 September 2018Railway 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.
1 June 2018Leroy Automation on the Road to ‘Make in India’ TCMS Components
As a major international railway partner, Leroy Automation will strategically sponsor the 2nd annual Future Rail India Summit 2017 in New Delhi on 7-8 December.
23 November 2017LEROY 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.
14 November 2017LEROY AUTOMATION at APTA 2017
28 September 2017Leroy Automation to Showcase Highly Reliable Rail Automation Solutions at SIFER 2017
8 March 2017LEROY at InnoTrans 2016: Your Next Generation of TCMS and Automation
2 September 2016Leroy Automation Gets On-Board New Generation of Driverless Metros
18 April 2016Leroy Automation To Showcase Control Systems at Eurasia Rail 2016
15 February 2016Inaugural Nippon Show for Leroy Automation
8 October 2015SATURN: SIL2-Certified Fail-safe Remote I/O System Architecture for Trains
15 September 2015Leroy Automation Commits to a Greener Approach
3 August 2015Leroy Automation to Exhibit at SIFER 2015
23 February 2015Leroy Automation Appoints New Business Development Engineer for North America
20 February 2015Visit Leroy Automation at APTA EXPO 2014
6 October 2014Visit Leroy Automation at InnoTrans 2014 (Booth 3.2/105-G)
1 September 2014Leroy Automation Confirms Its Localization in North America
16 June 2014Leroy Automation Heads to EXPO 1520 in Moscow, Russia
3 September 2013Visit Leroy Automation at Korea Railways & Logistics Fair 2013
10 June 2013Leroy Automation Showcases Latest EN50155 Systems At SIFER 2013
13 March 2013Leroy Automation Gets On-Board the MIPYRAIL Innovation Cluster
18 December 2012Meet Leroy Automation at Exporail (Stand 113 – Hall 1)
18 October 2012Visit Leroy Automation at InnoTrans (Booth 3.2 / 210-J)
21 August 2012Leroy Automation Winterised RIOM for Russian Market
29 June 2012Leroy Automation (HQ)
- +33 5 62 24 06 86
- sales@leroy-autom.com
- LEROY Automation on Youtube
- www.leroy-automation.com
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Leroy Automation (North American Office)
- +1 438 794 5166
- +1 438 794 5159
- sales@leroy-autom.com
- www.leroy-automation.com
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