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Keypad access control system - CD3500, CD4000
The CD3500 is developed by SIEMENS to provide fast and reliable programmable code lock for safeguarding and safekeeping valuables in a room. A code is entered for entry and a handle can be turned from the inside for exiting. This device can handle and process 9 4-digit codes. CD3500 can be powered by either alkaline and lithium batteries. Easy to install and assemble without the risk of damaging the door. The control of the CD3500 lies in its keypad, the manual alignment of the lock, and blocking against manipulation. LEDs are incorporated to act as indicators if the code is entered correctly, if the door is properly locked and closed or if its still open.