Rev. A.2, 10/03

Page-7

FIG 5: DC LOCK - DC POWER WIRING

POWER SUPPLY

+

12 OR 24 VDC

DC POWER NEED NOT BE REGULATED

 

 

AC

 

 

IN

 

 

F

 

 

DC IN

 

 

 

 

+

/OUT

 

NOTE: MOV NOT REQUIRED IF

SECURITRON MAGNALOCK IS USED

IF FAIL SECURE

NC1 C1 NO1

 

DC FAIL SECURE

+

OR FAIL SAFE LOCK

IF FAIL SAFE MOV

3.4 USE OF THE “F” TERMINAL

 

 

 

 

 

 

 

The F terminal on the power strip is not connected to

 

 

 

FIRE ALARM

anything.

It is

a

free terminal

with

either

of

two

 

 

AC

CONTACTS

intended

uses.

 

First,

on

some

complicated

TRANS-

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

installations, a large number of

wires

(generally

DC

FORMER

 

IN

C

 

C

negative)

may

require

termination.

It

can

be

 

 

 

convenient to run a jumper from the DC- terminal to

 

 

F

 

the F terminal so that the large number of negative

 

 

DC

WHEN THE FIRE

returns can be spread on to the two terminals. This

 

 

 

 

ALARM CONTACTS

 

 

avoids putting two many wires on one terminal or

 

 

IN

 

 

OPEN, ALL POWER

 

+/OUT

splicing into wires.

Second, some magnetic

lock

 

WILL BE REMOVED

installations require interface with NC contacts

 

 

 

FROM THE DOOR

controlled by the fire alarm system which will cut low

 

 

 

 

voltage power immediately releasing the magnetic lock for safety. The connection to the fire alarm contacts is normally made in the power supply but if you are using a plug in power supply, you’ll want to make the connection on the DK-26 CPU board where you have terminals. The presence of the F terminal makes the connection more convenient. Using the example of a plug in AC transformer, you would connect one leg of the transformer output to one AC IN terminal and the other to F. You would then connect the NC contacts from the fire alarm system to the other AC IN terminal and F. See the drawing to the right.

3.5 ADDING OTHER LOCK CONTROL SWITCHES

The drawings in Section 3.3 are valid for simple installations where the DK-26 is the only control device that can release the electric lock. Often, however, additional control devices are called for. The most common is some type of exit switch and this issue is covered in the next Section. Sometimes other control switches are needed which are not appropriate for the REX input as use of this input triggers the timed release capability of the DK-26.

A typical example would be a switch located centrally which would release the lock in response to an intercom call for example. If the lock is fail safe, the switch will need to break power to the

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Assa DK-26 manual DC Lock DC Power Wiring, USE of the F Terminal, Adding Other Lock Control Switches
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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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