High Speed Interface for the s88-Feedbackbus!

The HSI-88-USB is a Feedback-Interface from a s88-Feedbackbus to an USB-Interface of a Computer.

The interface includes three s88 bus-plugs. This offers the advantage of a much faster s88 bus handling and the possibility to build up three bus-lines at the layout-system!

All Feedback-Events will be fast transmitted, without any detour via the command station, via the USB-Interface directly to the PC.

Features of the HSI-88-USB

  • A fast (1.1/2.0 Full-Speed USB-Connection) galvanically isolated connection to the computer via USB. All USB-Units require a so called USB-Unit Driver Software which can be found at the section Downloads for the HSI-88-USB.
  • The 3 feedback lines additionally enhance the reading-time of the s88-feedback bus by 3-times.
  • 3 feedback lines will give you the advantage of a more simple arrangement of the feedback modules below your layout.
  • It is possible to monitor a total of 31*16 feedback contacts with one bus-line. But in summary of all three bus lines are not more than 31*16 contacts readable.
  • Besides all standard-feedback-modules such as s88 from Märklin or our RM-88-N / RM-DEC-88 you can naturally operate on the HSI-88-USB as well our feedback modules witch optocoupling RM-88-N-O / RM-DEC-88-Opto and our feedback modules with integrated track occupancy report RM-GB-8-N / RM-GB-8.

Correct connection of the s88-standard feedback cables of all three feedback lines to the High Speed Interface HSI-88-USB: Right hand and at the middle an interference-free twisted s88-standard bus cable from our delivery program. Left hand a ribbon-cable from Märklin or other manufacturer.

With the adapter Adap-HSI-s88-N is it possible to connect s88-Feedback Modules such as RM-88-N, RM-88-N-O or RM-GB-8-N directly via the screened Patch-Kabel to the HSI-88-USB in accordance to s88-N. For this connection shall be the Adapter Adap-HSI-s88-N simply plugged onto the three 6-poles pinbar of the HSI-88-USB.

  • The HSI-88-USB operates event-driven: any changes on the tracks are reported immediate to the PC. This saves substantial PC resources and reduces the response time considerable because the pc has not to request cyclical about changes but gets all updated changes reported from the interface.
  • If you want to use an own written model-rail-way-software for the communication with the interface HSI-88-USB you can find the relevant programming-commands within the next section!
  • Each Feedback-Interface HSI-88-USB will be supplied together with an USB-Connection Cable for the connection to the PC.
  • The actual HSI-88-USB firmware and the actual USB-Drivers can be downloaded within the next section.
  • Each Interface HSI-88-USB will be supplied with a detailed manual incl. installation-instruction and various sample-screenshots. Those instructions can be found within the next section.
  • The finished module in a case comes with 24 month warranty.
  • The HSI-88-USB is available as a tested finished module in a case (-G).


Instructions regarding this article can be found here: Downloads HSI-88-USB.
Instructions for all LDT-Components can be found here: Overview Downloads.


Sample-connections regarding this article can be found here: Sample-Connections HSI-88-USB.
Sample-connections for all LDT-Components can be found here: Overview Sample-Connections.

Add to Wish List / Prices

Attention: Products can only be added to the Wish List, if you are registered as customer at the LDT WebShop or if you are initially registered by interest of our products.

Add to Wish List: HSI-88-USB-G (Art.-Nr.: 030913): High Speed Interface for the s88-feedbackbus as a finished module in a case (129,90 €*).

* All prices incl. VAT, plus Shipping.

HSI-88-USB compatibility list

Please see in the table below which model railway software already supports the High Speed Interface HSI-88-USB:

Brand Company/Internet Site HSI-88 compatible from version
Railroad & Co.(TrainController) Freiwald Software www.freiwald.com yes 5.8 D1
Railware Railware Andrea Hinz railware.de yes 5.04
WIN-Digipet Dr. Peterlin www.windigipet.de yes ProX
Koploper P. Haagsma www.pahasoft.nl not yet -
railX W. Schwickardi www.railX.de yes 6.2
RocRail wiki.rocrail.net not yet -
DDL - DigitalDirect for Linux www.vogt-it.com/OpenSource/DDL/ not yet -
iTrain www.berros.eu/itrain Windows / Java 7 2.1
ModellStw www.modellstw.eu yes 6.22

Subject to technical changes and errors.
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