Do you want to know more about the Z21-digital system? Here you can find our current product documents for free of charge download.

All connections of the black Z21-digital system

Z21_Connections (pdf - 19.30 MB)

All connections of the white Z21-digital system

z21_Connections (pdf - 8.21 MB)

Z21 apps.

Z-21 mobile HD, iPad
Z-21 mobile, iPhone
Z-21 mobile, Android
Z21 Updater, Android


Z21 Usermanual (pdf - 3.86 MB) (Deutsch, English, Francais)
Z21 Usermanual (Italian, Spanish, Portuguese) (pdf - 6.13 MB) (Italian, Spanish, Portuguese)
Z21 Usermanual CN 中文用户指南 (pdf - 8.41 MB) (Mandarin)
Z21 Usermanual JP デジタルシステム (pdf - 3.67 MB)
Z21 Usermanual CZ (pdf - 3.40 MB)

Z21 and z21 EN (pdf - 3.57 MB)

Z21 Führerstand BR 218 (pdf - 827.40 kB)
Z21 Führerstand der BR 52 (pdf - 4.38 MB)
Z21 Führerstand der BR 103 (pdf - 1.52 MB)
Z21 Führerstand der 1116 Taurus (pdf - 1.72 MB)
Z21 Führerstand der Rh 109 (pdf - 1.77 MB)
Z21 Digitalsystem (pdf - 1.26 MB)
Z21 Digital System en (pdf - 1.20 MB)

Z21_Booster_light_10805 (pdf - 2.52 MB)


Manual to use the Gleisbesetztmelder GBM16XN from Blücher-Elektronik with your Z21
Z21 GBM16XN (pdf - 2.68 MB) (German)

Z21 Maintenance / WLANmaus

With the Z21 service application “Z21 Maintenance” you can configure and update your entire Z21 system via Ethernet or WiFi. With this application you can always keep your Z21, as well as smartRail, multiMAUS, WLANmaus, and Z21 Detector up to date.

Z21_Maintenance_V1.13 (zip - 6.54 MB)


New Z21 Firmware V1.32:

  • DCC: Bugfix for Configuration Variable access with improved ACK detection.
  • DCC: New option "DCC turnout invert straight/branch" (customer request).
  • DCC: Existing option "DCC tournout-address shift +4" renamed to "DCC tournout-addressing according to RCN-213".
  • CAN: Bugfix for initialization of the CAN controller.
  • CAN: Revised ZCAN20 commands for switching accessory devices and reporting the actual turnout states with CAN-digital-Bahn "WeichenChef".
  • R-BUS: Bugfix for hot-plugging feedback modules onto R-BUS.
  • X-BUS: Bugfix for switching loco functions F0 - F4 with the multiMAUS: functions F17 - F28 were cleared by mistake.

New multiMAUS Firmware V1.05:

  • Extension to 29 loco functions: the third level F21 - F28 is activated by double-clicking the shift-key.

New Z21 Detector Firmware V3.1.20:

  • CAN: POM read results in BiDi channel 2 are always forwarded to Z21 on CAN independent from the detector settings.

New WLANmaus Firmware V1.07:

  • Bugfix: On setting 28 speed steps the speed step 1 was not processed.
  • New Feature: Adjustable speed steps visualization.
  • New Feature: Adjustable control knob catch function.
  • New Feature: Adjustable turnout switching time.
  • New Feature: Adjustable route pause time.
  • For a more detailed description see WLANmaus-Firmware-Aktualisierung.pdf inside the zip-file.


Previous Versions:

Z21_Maintenance_V1.12 (zip - 6,86 MB)



With this application you are able to stream the picture of your camera on your PC or laptop.

Videolok_Live (zip - 1.28 MB)