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Command Station:

Fichtelbahn: OpenDCC GBM (GBM)

Summary: The OpenDCC GBM is a DIY command station from Fichtelbahn. It is part of the manufacturer range of BiDiB enabled products.

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GBM-Baugruppe produktbild web.jpg
General information
Manufacturer Fichtelbahn
Check Prices Latest Prices
Manufacturer Part Number
Common Name OpenDCC GBM
UPC Number
Release information
Product URL Product Link
Manual URL Manual Link
Has computer interface
Firmware Upgrade Possible Yes
Year Released
Year EOL
Integrated Throttle None
Throttle Network BiDiB
Programming Modes
Separate Programming Track
DCC Features
Extended Addressing
Max Simultaneous Throttles
CV Readback
Max Simultaneous Trains
Supported Consisting Methods
Max Consists
Speed Steps
Max Switches
Feedback Yes
Zero Stretching
Auto Shuffle Train / Signal Speed Control
LocoNumberReadback Yes
Max Current 4
Continuous Current
Auto Reverse
Input Power Waveform


The OpenDCC GBM is a DIY command station from Fichtelbahn. It is part of the manufacturer range of BiDiB enabled products. This command station is focused on computer control and contains an USB port for connection to a PC running model rail control software.

The GBM contains a 4 Ampere booster. It contains a 16-fold output via an embedded GBM16T module. These 16 outputs are feedback capable, so they can detect train occupancy of each block. They are also Railcom enabled so train identification is possible. (Assuming a Railcom enabled decoder is installed on the locomotive).

The GBM command stations can be extended with two further GBM16T modules so in total one GBM with two GBM16T can provide 48 occupancy detection and feedback track blocks.


In a BiDiB device network one GBM acts as a master and is responsible for interfacing with the PC software and generating the DCC signal. If further boosters are necessary more GBMs can be connected to the BiDiB network via standard CAT-6 network cables. Each of these will act as a slave to the master GBM.

Other BiDiB enabled devices can be connected to network. These include:

  • Points (turnouts) decoders
  • Servo motor decoders
  • Light control decoders
  • Relay switch decoders
  • S88 interface devices.


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