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 Sistema digital es (pdf - 1.22 MB)

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

Technical downloads

Z21_Maintenance_V1.11 (zip - 2.33 MB)


By popular demand of the Z21 community we are starting to offer the new Z21 service application “Z21 maintenance” in the version 1.10 right now. With this application you can configure your Z21 with an ethernet connection or WLAN and maintain your Z21. Simply run the EXE file on your laptop or PC, connect the device with your Z21, open the EXE file and click on “connect”.
Please keep in mind that the setting of your Windows firewall and if you have a virus scanner (virus detector software) that the “Z21 maintenance” has to be able to communicate via UDP with the ports 21105, 21106 and 34472 to be able to talk with your Z21.

Z21_LAN_Protokoll V1.05 (pdf - 770.41 kB)
Z21 Maintenance V1.05 (exe - 4.61 MB)
Z21 Maintenance V1.06 (zip - 2.09 MB)
Z21_Maintenance_V1.08 (zip - 2.67 MB)
Z21 - Maintenance V1.10 (zip - 2.65 MB)

Z21 Router Konfiguration (pdf - 935,00 kB)

If you want to know more beyond that, please simply contact our specialist trade partners in your vicinity.
Dealer list


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

Videolok_Live (zip - 1.28 MB)



Roco NEXT Generation App Download:

ITunes: Link

Google Play: Link