Еncrypted Vandal-proof iButton access control kit for lifts BulKey BK519A


  • Encrypted micro system that works with special encrypted Lesi-type iButton protocol chips that cannot be copied.
  • Kit includes integrated iButton reader. Works with standart and encrypted keys.
  • For locking of home, office and public building doors, as well as access control of lifts.
SKU: BK519A Category:

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End of uncontrolled chip duplication !!! Encrypted vandal-resistant access control kit for elevators with multiple protections. Works with iButton with Lesi chip. Using the BULKEY electronic lock for elevator control solves much of the user’s problems by turning off the floor selection buttons in the elevator cabin. The device is small and hidden, with only a metal reader visible, which makes it resistant to vandalism.

The BKU519 is an encrypted micro system that works with special encrypted Lesi iButton protocol chips that cannot be copied to locksmith studios! The BulKey BKU519 encrypted keys are 128 bit dynamic code and have an extremely good price / security ratio and protect the key from copying through standard copiers. They are suitable for access control for doors of buildings and lifts. The advantage is that they can also be used on standard non-encrypted systems, which allows one key to be used for many different devices. The controller has a transistor output and is programmed with a master key. It also manages the chips – recording, deleting, banning. To temporarily disable and enable a specific chip, in addition to the master key, a button is also used

The kit includes:
BKU519 controller;
Vandal-resistant LRD34 reader;
Master key;
Button lock relay
Detailed documentation. The programming and operation of the system is described in the enclosed product manual.

Custom electronic keys are not included. They depend on the individual needs of each client. You can read prices and details about encrypted chips here: iButton ENCRYPTED.

Using the BULKEY electronic lock for elevator control solves much of the user’s problems by turning off the floor selection buttons in the elevator cabin. The device is small and hidden, with only the reader visible, which makes it resistant to vandalism.

The principle of control is as follows: A reader is installed in the cab, which allows or not to select the floor of the button. The reader has an LED which, if lit in red, indicates that the floor selection buttons are off. After submitting an electronic key programmed to the system, the reader LED lights up in green and allows the floor selection button to operate for up to 15 seconds (adjustable from 1 second to 4 minutes). After these seconds have elapsed, the pushbutton operation is automatically disabled and the LED lights up in red again. If the elevator moves, turning off the floor selection buttons does not in any way interfere with the normal operation of the elevator. For five consecutive times a wrong key is submitted (not recorded in the system memory), the system locks for 5 seconds (time adjusts from 1 second to 5 minutes). This option allows the elevator to be called on the floors of each one, and the choice of the floor from the pushbutton in the cabin can be made only with a valid electronic key.

BKU 519 is a standalone electronic controller with transistor output for access control with integrated reader. From one part of the system are displayed the reading element, light indication, service inputs and outputs – sound indication, programming. On the other side of the plant are the outputs and the inputs for the control and power supply. The huge advantage of the BKU 519 is the built-in reader, which is mounted directly in the elevator panel together with the electronic controller.

The BKU 519 has a built-in memory for electronic keys and has the ability to select events to be stored in chronological order with date and time. The clock is energy dependent, ie. at reset the power supply always starts from 2001.01.01. If necessary, to check when an event occurred, the date and time of the system can be seen at the moment and by regression to calculate the time of the particular event. Clock energy can be avoided if a battery is connected to the system.

The kit has a master key through which the system is programmed, the electronic keys are recorded and deleted. With the LESI-patented light indication system showing the number of electronic switches operating the system, users can easily and quickly perform control and programming – recording, deleting, status, total. For ease of use with many electronic keys – frequent deletion, recording, disabling, the BKU 519 can be connected to a computer for faster and easier operation

A major advantage of the BKU519 over other systems in this class is the ability to log on to the system through a computer connection input, not only with a master key, but also with a password. The system has a high-security 32-bit shared password and a 40-bit password to access specific features. This feature allows the system owner to provide a shared password to a trusted person who, with that access, can only manage the keys – save, disable, enable or delete them through the specialized BulKay software, but will not be able to change passwords and master keys. Password access provides options for:

Remote control of the system via GSM or LAN communicator – change settings, key management and more
Each system can be configured to connect to a common network with others like it. Systems can be addressed as well as changing the speed at which they communicate with each other. Networking allows them to be shared via a GSM or LAN communicator.
Master key access is equivalent to 40-bit password access.


Additional information

Weight 0.350 kg
Dimensions 5 × 5 × 5 cm


Size of the controller

50/15 mm

Operating temperature

-40 to +60 'C

Protection against

short circuit, reverse polarity, overload

Security type

Output Type

open collector to -12V

Maximum current


Power consumption at rest

30 mA

Two-sided control


Output activation time

4s ot 15s

Type of electric key

Master Key included


Reader Included


Button or door intercom system input


Sound signalization

built-in buzzer

Three-color light indication


PC connection


Non-volatile event memory


Built-in clock


Vandal resistant


Remote control via GSM or Internet


System User Programming and Key Management

with Master Key

Suitable for

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