The Rail Distribution Box

Train Approved FO Splice Box

Ruggedized protection for any situation

In rough conditions, occurring in industrial or outdoor areas, high quality fiber optical connections are needed despite the mechanical and climatic stress.
For this purpose, Telegärtner has developed the train approved distribution box, called RDB. Because of its tested reliability against vibrations and shocks and also heat, coldness and humidity, the RDB is perfectly suited for use in harsh environments.

RDB bestückt mit LC Duplex und OS2 Pigtails

Hinged splice cassette for easy assembly


Besides its robust housing including the IP66 protection and UV resistance according to UL 508, a hinged splice cassette is mounted onto the RDB, which enables easy assembly and maintenance. Different front plates are available to meet your demands - being able to store pigtails with all common connectors and fibers. Moreover, the splice cassette enables up to 24 splices. Via the three cable glands, cables of different outer diameters C can be fed in or out.
If the box needs to be fixed to a signal mast, an additional adapter plate is available which can be mounted onto the distribution box.

Technical Details

  • Complies with climatic test EN 60068-2-1/2/14/130
  • Complies with vibration test EN 60068-2-64
  • Complies with shock test EN 60068-2-27
  • Degree of protection: IP 66
  • Housing material: PC IK 08
  • Housing colour: light grey, RAL 7035
  • UV resistance: UL 508
  • Housing flammability: UL 94 5VA
  • Cable entry points: 2x M25 cable glands (∅ 9-16 mm), 1x M20 cable gland (∅ 5-9 mm)
  • Housing dimensions: 400x300x150 mm
  • Number of splices: max. 24
  • Mounting cutout for adaptors : SC, LC, E2000, ST
  • Swivel lever can be equipped with profile half cylinder
  • Optional fixing of optical couplers (PLC/FBT) or xWDM (filter/FBT)
  • Not included in delivery: splice protector and holder

Order information

Rail Distribution Box
Order no. Description Remarks
H02050A0339 RDB distribution box 6x LC-D + Pigtails OS2

Further versions on request

Order no. Description Remarks

Adapter plate

for mast attachement

Splice holder for 12x crimp splice protectors

System Telekom

Splice holder for 6x shrink splices

for ∅ 3 mm