Product: GBM

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Summary: GBM is a Command Station by Fichtelbahn


GBM-Baugruppe produktbild web.jpg
General information
Common Name OpenDCC GBM Manufacturer Fichtelbahn
Product URL index.html Manual URL
Integrated Throttle None Max Current 4
Computer Interface Yes Software Upgrade Possible Yes
Communications BUS BiDiB: BiDirectional Bus Firmware Upgrade Possible Yes
Separate Programming Track No
DCC Features
Address Range Max Simultaneous Trains
Support Consisting Max Consists
Speed Steps Max Switches
Functions Feedback Yes
Zero Stretching Ops Mode Programming
Auto Shuffle Train / Signal Speed Control LocoNumberReadback Yes
CV Readback

What references this product

None yet.

Other Command Stations made by same manufacturer


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.

Further Reading

Occupancy Detectors