DBAG-Baureihe 422
422 027 at Dortmund-Westerfilde station
Manufacturer	Alstom, Bombardier
Constructed	2007–2011
Entered service	2008
Number built	84
Operators	Deutsche Bahn AG
Lines served	S-Bahn Rhein-Ruhr
Specifications
Car length	69.43 metres (227 ft 9+7⁄16 in)
Width	3,020 millimetres (9 ft 10+7⁄8 in)
Height	4,033 millimetres (13 ft 2+3⁄4 in)
Floor height	1,025 millimetres (40.4 in)
Platform height	960 mm
Doors	12
Maximum speed	140 km/h
Weight	112t
Power output	2,350 kW
Power supply	Electric
Electric system(s)	15 kV 16.7 Hz
Braking system(s)	Electric, air
Safety system(s)	Sifa, PZB
Track gauge	1,435 mm (4 ft 8+1⁄2 in)

The Class 422 is a series of four-car electric multiple units that are a derivative of the DBAG Class 423. The two inner cars in the set are designated as Class 432 vehicles.

History

The units were commissioned by Deutsche Bahn in 2005. 78 units worth €343 million were built by Bombardier Transportation and Alstom and delivered between March 2008 and October 2010. They are now used in such places as like on the Rhine-Ruhr S-Bahn which operate in cities like Köln and Düsseldorf as well as the Ruhr area.

Deutsche Bahn uses the units on the Rhine-Ruhr S-Bahn network, unlike most S-Bahn Networks which use similar DBAG Class 423 trains. The inner carriages are called Class 432. Following a timetable change in December of 2019 the units are currently used exclusively on the S1, S4, S5 and S6 lines of the network.