Rev. A.2, 10/03

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PROBLEM-- How to check the Keypad

For reference, when each key is pressed, two terminals will measure zero volts with respect to the WHT (common) terminal. You can use a voltmeter to see that each key is working correctly. Put the positive probe on WHT and when key #1 is pressed you will read roughly zero volts on VIO and BRN (the other terminals in the matrix will be reading about 11 volts. The terminal pair that will show zero volts for the other keys are as follows:

#2 = VIO + GRY #7 = ORG + BRN

#3 = VIO + BLK #8 = ORG + GRY

#4 = PNK + BRN #9 = ORG + BLK

#5 = PNK + GRY #0 = BGE + GRY

#6 = PNK + BLK BELL=BGE +BLK

PROBLEM-- Unusual operation complained of after some operating history

"Unusual" operation can be caused by the microprocessor in the CPU Board being disturbed by electrical noise. Symptoms can vary quite a bit. The unit may forget its codes, the action of the keypad beeper may become drawn out or erratic, the timer may function at widely varying ranges, etc. To cure the problem, remove power from the CPU Board for about 10 seconds, then reconnect it. This forces the microprocessor to reset itself and reload its program. If the unit has functioned for a long period of time without incident, this may be an adequate fix. The problem may never reoccur and the end user should be made aware of this simple fix if it should reoccur. All microprocessors can sometimes "crash" and they are restored by reset. If, however, the problem is more persistent, steps can be taken to guard against electrical noise problems. You should make sure that the MOV furnished with the unit is properly installed across the electric lock (review Figures 3-5). The inductive kickback from electric locks can often be a source of considerable electrical noise. Noise can also come from the keypad cable, particularly if its length has been extended. There is no specific distance which is a limit for an extended keypad cable. Shorter is always better as cable noise varies with the proximity of noise producing devices such as motors, fluorescent or neon lighting etc. The same problem can occur if the cable from an exit switch is extended a long way from the CPU board. If there are noise sources, it may be necessary to limit the cable run distances while also trying to avoid the noise sources.

If the problem shows up frequently, it is usually bad power. This particularly occurs when a fail secure lock is operated from the same supply as the DK-26. When the lock is energized, it may draw too much power for the power source. This reduces the voltage and these voltage swings can crash the microprocessor. The solution is either to use a power supply with greater capacity or use two power supplies: one to operate the DK-26 and the second to operate the fail secure lock through the DK-26's lock control relay.

IF THE PROBLEM PERSISTS

CALL SECURITRON TOLL FREE: 1-800-MAG-LOCK

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Assa DK-26 manual PROBLEM-- How to check the Keypad
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DK-26 specifications

The Assa DK-26 is a state-of-the-art electronic locking system designed to provide enhanced security for a variety of applications, including commercial, institutional, and residential environments. This locking solution is characterized by its robust construction, advanced technology, and user-friendly features, making it a popular choice among security professionals.

One of the standout features of the Assa DK-26 is its innovative design, which combines mechanical and electronic security elements. The locking mechanism utilizes a high-security cylinder, ensuring that unauthorized access is thwarted. This cylinder is key-operated, allowing for traditional key entry while also supporting electronic access control, offering flexibility to users.

The DK-26 is equipped with advanced electronic technologies that enhance its functionality. One of the key technologies integrated into this system is RFID (Radio Frequency Identification). This allows users to gain access using key fobs or cards that contain embedded RFID chips. The system can be programmed to allow or deny access based on time schedules, occupancy status, or individual user credentials, providing a high level of control over who can enter a facility.

Another notable characteristic of the Assa DK-26 is its ability to integrate with various security management systems. This compatibility allows for centralized control and monitoring of multiple locking devices, enabling security personnel to efficiently manage access across an entire building or campus. Additionally, the DK-26 features real-time audit trails, which log all access attempts and can be reviewed for security audits or investigations.

The DK-26 is designed for durability and resilience, featuring weather-resistant materials that make it suitable for both interior and exterior applications. Its sleek and modern aesthetic adds to the appeal for businesses looking to maintain a professional appearance while ensuring optimal security.

Installation of the Assa DK-26 is straightforward, as it can be retrofitted to existing door hardware without requiring extensive modifications. This ease of installation, combined with its reliable performance, makes the DK-26 an intelligent choice for anyone looking to upgrade their locking systems.

In summary, the Assa DK-26 electronic locking system combines high-security mechanical features with advanced electronic technologies, making it a versatile and effective solution for securing a diverse range of environments. Its RFID access capabilities, integration with security management systems, and robust construction make it a standout choice in modern security solutions.
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