Electromagnetic Door Lock | Bolt Lock | 12VDC | NC | Holding Force 800kg | 0/3/6s Time Delay | Fail-Secure

Surface-mounted electric bolt door lock – 12 V DC, NC, 0/3/6 s delay, 4-wire interface

Surface-mounted electric bolt door lock is intended for locking doors in access control systems. This specific lock version operates according to the NC principle: when power is disconnected, the lock bolt remains extended and the door is locked, while applying 12 V DC power retracts the bolt and unlocks the door.

The lock can be controlled by a keypad, card reader, biometric terminal, intercom, access control controller or another device providing a suitable signal. The lock has a 4-wire, 12–24 V interface. The exact purpose of each wire and the connection diagram must be checked against the diagram supplied with the product.

The surface-mounted construction is installed on the door frame or another suitable horizontal surface. The aluminium-alloy housing, stainless-steel bolt and adjustable 0, 3 or 6-second delay are suitable for more intensively used wooden, metal and PVC-profile doors.

• Power supplied – the lock is locked.
• Power disconnected – the lock is unlocked.
• Power supply fails – the door is released.

• 0 seconds – for doors that close quickly and accurately.
• 3 seconds – for most conventional doors with a closer.
• 6 seconds – for slower-closing or heavier doors.

• NC operation – the door remains locked if power is lost.
• 12 V DC power supply – for access control systems.
• Surface mounting – reduces the need for frame routing.
• Electric bolt locking.
• 0, 3 or 6-second delay.
• Four-wire system – for power and status signalling.
• Ø12.5 mm bolt – made of stainless steel.
• 15 mm bolt travel.
• Aluminium-alloy housing.
• Low heat generation – for continuous powering.
• Suitable for intensively used access-control doors.

• In office buildings – for office doors and restricted-access areas.
• In hotels – for service and technical rooms.
• In apartment buildings – for controlling common-area doors.
• In shops – for storage areas and staff-only zones.
• In educational institutions – for restricted-access rooms.
• In warehouses – for internal security zones.
• In server rooms – for technical equipment rooms.
• In administrative buildings.
• In healthcare facilities – for restricted-access areas.
• In other access control systemswhere NC locking is required.

1. Assess the door construction. Check the frame, door leaf, opening direction and door closer.
2. Select a horizontal installation position. The lock must be mounted securely and in the correct orientation.
3. Mark the fixing points. Use the housing or an installation template.
4. Secure the lock housing. Use fasteners suitable for the door material and load.
5. Install the strike. Its opening must align precisely with the bolt axis.
6. Check the bolt travel. The bolt must move freely and must not rub against the edges of the opening.
7. Route the power and signal wires. Protect them against pinching and mechanical damage.
8. Connect the 12 V DC power supply. Check the polarity and the current capacity of the power supply.
9. Connect the 4-wire interface. Follow the diagrams for the lock and access controller.
10. Set the delay to 0, 3 or 6 seconds.
11. Check NC operation. When power is disconnected, the lock must remain locked.
12. Perform several test cycles. Check locking, unlocking, door closing and the function of all wires.

• Use only a 12 V DC power supply.
• Do not apply 230 V AC directly to the lock.
• Observe the power-supply polarity and the supplied wiring diagram.
• Take into account that the lock will remain locked if power is lost.
• Install the lock in a horizontal plane.
• Do not allow the bolt to jam mechanically.
• The door closer must close the door accurately and without a heavy impact.
• Do not use outdoorsunless a suitable IP protection rating has been confirmed.
• Protect the lock from water, condensation and conductive dust.
• Periodically check the mounting screws and bolt alignment.
• Installation and connection must be performed by a qualified specialist.

• Regularly check the alignment of the bolt and receiving opening.
• Remove dust and dirt from the bolt movement area.
• Check the mounting screws and tighten them if necessary.
• Monitor the condition of cables and connections.
• Check the door closer adjustment.
• Periodically check NC operation by disconnecting the power.
• Do not pour oil into the lockunless this is specified in the instructions.
• If jamming, unusual noise or overheating occurs, disconnect the power and contact a specialist.

NC, fail-secure surface-mounted electric bolt lock

The electric bolt lock is intended for controlling wooden, metal and PVC-profile doors in access control systems. It can be connected to a keypad, card reader, intercom, controller or another control device.

This specific version operates according to the NC principle: when 12 V DC power is supplied, the door locks, and when power is lost or switched off, it unlocks.

Surface mounting reduces the need for complex frame routing, while the adjustable 0, 3 or 6-second delay allows the bolt operation to be matched to the speed of the door closer.

The aluminium-alloy housing, Ø12.5 mm stainless-steel bolt and 15 mm travel are designed for more intensive use. A 4-wire, 12–24 V interface is provided and must be connected according to the specific wiring diagram.

The lock requires a stabilised 12 V DC power supply capable of delivering at least 1.2 A. Before installation, check the wiring diagram, the 4-wire interface diagram, compatibility with the door construction, and precisely align the bolt with the receiving opening.