The motor unit of the type 840 is designed for suburban and regional transport. It is a vehicle of similar constructional features as those used in Switzerland, Austria, Germany and Greece.
ŽOS Vrútky JSC as a head of consortium, together with its consortium partners Stadler Fahrzeuge AG and Bombardier Transportation manufactured the unit for Železničná spoločnosť JSC.

In its construction the motor unit of the type 840 meets all requirements for public train transport on suburban and regional railways. The motor unit consists of three parts: two aluminium terminal carriages for passengers and a steel corridor middle driving part. The floor of the carriages in getting-on and getting-off areas is on the same level as that of station platforms. Double winged entrance door is controlled electropneumatically. Holders for bicycles, skis, baby prams, vehicles for the handicapped, as well as racks for other kind of luggage are installed inside the carriages. There is also a lifting platform for use by disabled travellers. There are 94 seats, 16 tip-up seats and a place for 119 standing passengers in the modern carriage interior. Large windows with tinted glass offer very nice view of surrounding country.The unit is equipped with electronic information system informing passengers about the next stop/station, further railway connections etc. both visually and in sound.The hygienic module with vacuum toilet system is located in the unit. The construction of the transit middle part minimizes noise and vibration overload. The unit is equipped with three braking systems: 1. Electrodynamic brake - controlled by microprocessors, with action in driving axles 2. Electropneumatic brake - mechanical brake with action in all axles 3. Spring brake - parking brake with action in all axles - replacing hand mechanical brake Excellent construction variability of units of this type gives plenty of possibilities to use not only in regional railways but also in suburban transport. Module design enables to adjust its transporting capacity according to clients´ demands. Universal construction design of the driving unit (middle part), from diesel-electric drive aggregate up to electric traction of 25 kV 50Hz and 15kV 16 2/3 Hz AC, and from 1000 V up to 3000 V DC, provides possibilities for its use in various types of railway transport with the gauge of 1000 mm or 1435mm.

Main technical data of the motor unit of the type 840
Gauge	1 435  mm
Maximum speed	115 km.hod-1
Seating capacity - fixed seats                         - tip-up seats	94 16
Standing room capacity	119
Lenght of unit over buffer beam	38 470  mm
Lenght of unit	37 514  mm
Maximum unit width	3 000  mm
Maximum unit height from the rail surface	3 850  mm
Driven carriage lenght	16 459  mm
Middle driving part lenght	3 900  mm
Driving bogie wheelbase	2 100  mm
Driven bogie wheelbase	2 100  mm
Entrance door width	1 350  mm
Embarkation place height from the rail level	615  mm
Total weight of full occupied unit	77,7  t
Minimum curve radius at the track speed crossing	100  m
Motor output	550  kW
Maximum wheelset power	420  kW
Maximum tractive effort	69   kN
Wheelset arrangement	2` Bo` 2`

 Photos