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The SH4 is an ultimate access system that works with any electromagnetic lock and any RFID reader. It will work in your datacenter as well as in your office or even your home. Whether you have one door or several hundred racks, the SH4 system provides a cost effective way to manage access to your technology.

Each SH4 device can connect up to 2 electromagnetic locks and 2 RFID readers of your choice. There are many locks and RFID readers on the market. The SH4 already supports the most common models and others can be added upon request. 
The HWg-SH4e a door unlocker subordinated to the HWg-SH4 unit. HWg-SH4e unit opens two electromagnetic locks.

You can find more details about how the system works here:


  • Controls two electromagentic locks
  • Is controlled and configured by an SH4 unit
  • Can be managed in the free DCD2 SW

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Online Demo: 
Czech Republic
POLYGON ((12.090589 48.5518081, 12.090589 51.0557185, 18.8592361 51.0557185, 18.8592361 48.5518081, 12.090589 48.5518081))