high-speed-electronics-and-connectivity-in-the-modernlocomotive
                     High Speed Electronics and Connectivity in 
the Modern Locomotive
Today, developed and developing economies have 
mature as well as fast-growing rail networks 
running on the latest propulsion and signaling 
technologies, including high speed rail. Private and 
public rail operators purchase equipment from rail 
vendors and carry out supervision, operation, 
monitoring, and maintenance of trains and routes 
through their dispatch centers. 
Trains, once a byproduct of the industrial revolution, have evolved over 150 years to meet 
the fourth generation of industrial requirements known as Industry 4.0 aided by 
electronics and computerized automation. 
Locomotives with built-in computers and advanced displays allow the engineer to monitor 
critical parameters like speed, temperature, and brake/oil pressure.  
On the coach side, train servers 
use Ethernet to control 
passenger infotainment like 
public address system, 
displays, WiFi, charger ports, 
and video entertainment.  
These servers also manage 
lighting, HVAC, surveillance 
cameras, video recorders, 
conductor ZYPADs, and 
auxiliary services like 
automated doors, passenger 
counters, and GPS.  They also 
pass locomotive-related 
parameters like regenerative 
braking and hotel power, which 
is about providing power for 
heating, lighting, and electrical 
needs of the train. 
Track-side signaling 
cabinets and on-
track interlock 
switches 
communicate with 
the train using 
GSM-R, a wireless 
protocol having a 
rail-specific 
spectrum.  GSM-R 
also allows signals 
to clearly pass from 
locomotive to end 
coach and back, 
regardless of travel 
speed. 
5G is expected to replace GSM-R in the coming years. Combined with IoT it will offer 
better collision avoidance and predictive maintenance capabilities. 
The DIN 41612 high 
temperature backplane 
connector meets the fire 
safety standards of the 
locomotive control 
cabinet (NFF F1, I2 and 
EN 45545 certified).  
Rugged and harsh 
environment USB 2.0, 
Modular Jacks, D-Subs, 
and circular connectors 
bring seamless 
connectivity to vibration-
prone loco computers, 
event recorders, and 
digital cameras.
Inside coaches, passenger access modules contain micro-SIM cards, Network Video 
Recorders have SATA 3.0 SSDs, infotainment displays and HMI contain FPC, board-to-board, 
and wire-to-board connectors, and mobile charging ports are mainly USB 3.0 Type C.
Dispatch centers running the high speed Ethernet 10GBase-T use input-output 
connectors like USB 3.1, DisplayPort, and HDMI, as well as backplane and mezzanine 
connectors like AirMax®, Lynx™, and Lynx™ QD. 
Rail equipment undergoes extended design cycles, with a guaranteed life of about 60 to 
70+ years.  With increasing ridership and a positive economic outlook, the thriving rail 
business presents an opportunity as well as a challenge for technology providers to play 
their part and offer their best.
For more interesting topics and updates please visit:
www.amphenol-icc.com/connect