Codelocks CL5000 Series

Provides Single Door Access Control


The lock’s Piezo technology includes no moving parts, so there is nothing to break or wear out. Another advantage is Piezo technology requires minimal power consumption.

The Codelocks CL5000 Series single-door electro-mechanical door lock uses a unique method for controlling the unlocking mechanism: a Piezo crystal. A Piezo crystal can provide a determined reaction. When put under a minute amount of pressure, a Piezo crystal generates a small amount of electrical power. For this reason, Piezo crystalline material has been used as a component of keypad key technology. When provided with a small amount of electrical power, a Piezo crystal expands slightly. This ability to expand enables a Piezo crystal to be used to efficiently operate the Codelocks CL5000 Series Electronic Locks.

To operate as the activating component in the unlocking mechanism, a Piezo crystal is positioned within the actuator that controls the operation of the outside door handle. At rest, the outside lever will turn without being able to retract the latch bolt. When a correct code is entered into the keypad, an electrical charge causes the Piezo crystal to expand slightly. The expanding crystal moves a metal block into position, causing the plunger within the actuator to become rigid. When the outside lever is depressed, this rigid plunger rotates within its carrier, driving the spindle and retracting the latch bolt.

When the Piezo crystal is not powered, the plunger loses its rigidity and is free to move in and out of the actuator. In this condition, if the outside lever is pressed, the non-rigid plunger moves out of the way, unable to engage the spindle, which in turn cannot retract the latch bolt.

The use of the Piezo crystal provided a clutching mechanism for the outside lever. If the Piezo is not powered, the rotating the outside lever will not retract the latch bolt, no matter how much force is exerted.

An advantage of using Piezo technology includes no moving parts, so there is nothing to break or wear out. Another advantage is Piezo technology requires minimal power consumption. According to Codelocks, Piezo technology cycle requires one-sixth the amount of power consumed by a forward and reversing cycle motor using five volts. It requires 1/66th the amount of power consumed by a continuous duty solenoid using five volts. As a result, the Codelocks CL5000 Series lock is capable of more than 500,000 operations from four 1.5 Volt AA Energizer brand Ultra batteries.

The UL Listed Codelocks CL5000 Series are keypad-operated electro-mechanical locks. They are equipped with a 12-button telephone style keypad and blue and red LEDs. These locks have non-volatile memory that maintains the settings even if the batteries are removed or lose power. The lock housings and levers are manufactured of a zinc alloy. The CL5000 Series lever sets are non-handed, having reversible levers.

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