REX Function | Assa DK-26 instruction

AN N.O. SWITCH CLOSING BETWEEN "SRC" AND "REX"

CAUSES TIMED RELEASE OF THE DOOR.

SRC REX

Rev. A.2, 10/03

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lock and if it’s fail secure, the switch will need to send power to the lock. Figure 6 shows how to add external contacts for non timed remote release of the lock for both lock types.

FIG. 6: ADDING EXTERNAL CONTACTS FOR FAIL SAFE AND FAIL SECURE LOCKS

		AC
		IN
		F
		DC IN


+		/OUT
+

FOR NON-TIMED REMOTE RELEASE OF FAIL SAFE LOCK, PLACE NC CONTACTS IN CIRCUIT AS SHOWN

NC1 C1	+	FAIL

	MOV	SAFE
		LOCK

		AC
		IN
		F
		DC IN


+		/OUT
+

FOR NON-TIMED REMOTE RELEASE OF FAIL SECURE LOCK, PLACE NO CONTACTS IN CIRCUIT AS SHOWN

C1 NO1	+	FAIL
	MOV	SECURE
	MOV	LOCK

3.6 THE REX FUNCTION

Often, when the DK-26 is used, provision must be made to allow people to use the door freely from the inside. If an electric strike is used, exit may be accomplished by purely mechanical means (turning the doorknob). If, on the other hand, a solenoid operated or electromagnetic lock is used, free exit is only possible if a switch on the inside releases the lock. Connection of this switch or switches is most easily

accomplished by using the DK-26's REX input terminal (see Figure 2). REX stands for Request To Exit. When a normally open switch activates the REX terminal, the DK-26's control relay will open the lock for the amount of time programmed into the DK-26's timer. The result is the same as if the DK-26 was used from the outside of the door. The REX terminal is activated by being connected to the SRC (voltage source) terminal. It will also activate if +12 or +24V is input to the terminal from the DK-26’s external power supply. The drawing to the right shows the simplest connection to an external normally open momentary switch. Any number of additional switches could be connected in parallel so that pressing any of them would activate the REX function. An example of when this multiple switch capability is used would be an installation with an exit button at the door and a second one at a receptionist’s desk for example. Either could open the door for the programmed time.

There are some special characteristics as to how the REX input works. First, it does not start the timer when the input is closed but rather when it reopens. This means that you can use the REX input to release the door for an extended period of time. As long as terminals REX and SRC remain connected, the lock will be released. When they disconnect, the lock will remain released for the amount of time programmed. This extended release capability is useful in certain applications. The REX input is also retriggerable. This means that if the lock has been released and the REX input is triggered, the release time will be extended to the full value that has been programmed.

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.