Electromagnetic Door Lock Fail Safe 12-24V 60 180 280 kg Maglock Access Control
Electromagnetic door lock: closed when powered, open when not powered
An electromagnetic lock is the simplest lock in an access control system: an electromagnet attached to the frame and a holding plate attached to the door. As long as the magnet is powered at 12 or 24 V DC , the plate remains attached and the door cannot open. When the access control system cuts off the power, the door is free. There are no latches, springs, or moving parts: nothing wears out and nothing jams. Choose from three holding forces depending on the door: lightweight doors and cabinets, interior office and shop doors, entrance doors, and pedestrian gates. It works well on wood, glass, metal, and fire doors. Control is via a keypad, RFID reader, or control board with relay, and requires a dedicated power supply : these accessories are sold separately.
Fail safe: the door remains closed with the power on and opens without it.
The electromagnet works the opposite of a traditional lock: it only holds when powered . This is the fail-safe principle, and is why it is used on emergency exits and in offices: if the power goes out, the door opens and no one is locked inside. The access control simply interrupts the power supply for a moment using the keypad or card relay . This happens when the user swipes their badge or presses the exit button. It is a single-door lock: one electromagnet for each door. If you need the door to stay closed even without power, this product is not for you: you need a fail-secure electric strike.
Anodized aluminum body, galvanized steel plate
The housing is made of aluminum alloy with an anodized finish that resists scratches and rust. The magnetic face is made of polished three-prong steel: the smoother it is, the better the plate adheres and the longer the declared holding force is maintained. The plate is made of galvanized steel and is resistant to the humidity of a hallway or garage and will not rust the door. Keep the contact surface clean: dust, glue, or tape between the magnet and the plate will reduce the hold. During operation, the body heats up to 20°C compared to the ambient temperature. It operates at -10 to 55°C, even in high humidity, provided there is no condensation.
Plate on pin with rubber: aligns itself with the magnet
The sealing plate is not rigidly screwed to the door. It is mounted on a central pin with a rubber washer and can wobble a few degrees. This allows it to rest flat on the face of the magnet even if the door is not square. Therefore, the central screw should not be tightened completely : if you tighten it, the plate will not settle and the seal will be compromised. Two lateral pins prevent the plate from rotating. The package includes screws , washers, and an Allen key: for wooden or glass doors, you will also need the appropriate brackets, described below.
Three holding forces: 60, 180 and 280 kg, which one to choose
The 60 kg version (Clock-1) is 8 cm long, weighs half a kilo and is suitable for furniture doors, cabinets and lightweight interior doors. The 180 kg version (Clock-2) is the standard size for office, shop and condominium doors. The 280 kg version (Clock-3) is 25 cm long and weighs 1.8 kg: for heavy entrance doors, pedestrian gates and fire doors. All operate at 12 or 24 V DC; the first two draw 300 mA at 12 V, the larger 500 mA .
L and ZL brackets and frame mounting step by step
The electromagnet is mounted at the top, on the inside of the frame, with the magnetic side facing the door. On outward -opening doors, the magnet, screwed under the crosspiece, is sufficient. On inward- opening doors, an L-bracket is needed for the magnet and a Z-bracket for the plate, as shown in the diagram. On frameless glass doors, a U-bracket is needed to hold the door in place. The brackets are not included . Assembly follows the illustrations: remove the screw and the side plate from the magnet, attach the side plate to the frame, and reassemble the body. Then secure the retaining plate to the door with the pin and dowels, aligned with the magnet.
Access control keypad
Smart WiFi IP66 Outdoor Keyboard with Card Reader
Access control power supply
12V power supply with lock output
Two-wire connection: power supply, keypad and exit button
The electromagnet has two wires , positive and negative: they connect to the lock output of the access control power supply, which receives the command from the keypad or card relay. The diagram shows a typical case: 12V power supply with lock output, keypad with badge reader, exit button on the inside, and electromagnet on the door. When the keypad recognizes the badge or someone presses the button, the relay cuts off the power to the magnet for a few seconds and the door opens. The points on the diagram lead to the keypad and power supply we usually use. The exit button is not included in the catalog: any normally open button will do.
Where to use: offices, shops, apartment buildings and pedestrian gates
This is the typical lock for access control systems: office and studio entrances, back rooms of shops, condominium entrance doors, server rooms, changing rooms, and pedestrian gates. It can be combined with a keypad with an RFID reader or a control board with a relay and exit button. The dedicated power supply is available with other electric lock accessories . In short: 12-24 V DC fail-safe electromagnet with a capacity of 60, 180, or 280 kg, anodized aluminum body and galvanized plate on a pin. For wooden, glass, metal, and fire doors, with screws and an Allen key included. Below are the products we usually combine.
Frequently Asked Questions
What happens if the power goes out?
The door opens: the electromagnet only holds as long as it's powered (fail-safe). This is why it's used on escape routes. If you want a door that stays closed without power, you need a fail-safe electric strike.
What holding force should I choose?
60 kg for furniture doors and light interior doors, 180 kg for office, shop and apartment building doors, 280 kg for heavy entrance doors, pedestrian gates and fire doors.
Does it run on 12 or 24V?
Both are DC powered. At 12 V, it draws 300 mA (60 and 180 kg versions) or 500 mA (280 kg); at 24 V, half that. The voltage must match the access control power supply.
What does it take to make it work?
A 12V DC power supply for access control and an enabling device: keypad, RFID reader, or control board with relay and exit button. These are sold separately.
Is this okay on a glass door?
Yes, with the U-bracket that holds the glass door in place and, if needed, the L-bracket for the magnet. The brackets are not included.
The door opens inward: what changes?
The magnet is mounted with an L-bracket and the plate with a Z-bracket, so they meet when the door is closed. On outward-opening doors, the magnet under the crosspiece is sufficient.
Why doesn't the plate screw need to be tightened fully?
The plate must be able to swing on the pin with the rubber washer to rest flat on the magnet. If you jam it, it won't settle and the holding force will decrease.
What's in the box?
Electromagnet, retaining plate with pin and rubber washer, screws, washers, and Allen key. Power supply, access control, and brackets are sold separately.