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Door Access Control Systems

Door access stock for installers: maglocks, keypads and RFID readers, fobs in both 125kHz and 13.56MHz, face terminals and exit buttons. UK stock, supplied on trade account.

Spec every door on four points

Four points spec any controlled door. Credential: fob, card, PIN, fingerprint or face. Locking: on this range, a magnetic lock, picked on holding force. Egress: a request-to-exit device on the secure side, which is mandatory, not an optional extra. Decision point: a standalone keypad at the door, or a controller running several doors off one user list.

Confirm the credential frequency before anything goes on order. 125kHz (EM4100/EM4102, also sold as “proximity” or “ID”) is cheap and universal, but it transmits a fixed number that a low-cost duplicator will copy. 13.56MHz (MIFARE / NFC, ISO14443A) runs an encrypted exchange; fit it on any door covering stock, cash or a residential block. Readers take one frequency only. Extending an old system? Check the existing reader before you quote fobs: the two look identical and are not cross-compatible.

Lock sizing: door first, then alignment. The rated holding force is a straight pull with the armature dead flat on the magnet, so a bracket that seats it properly buys more than going up a size. Double doors take a twin unit holding both leaves. External gates need a weather-rated body; an indoor lock on a gate corrodes inside a season.

Maglocks fail safe by design: kill the power and the door releases. Right on an escape route; wrong anywhere a store room or comms room must stay locked through a power cut. Where the door is on a means of escape, the release arrangement (emergency release in the lock power line, often tied into the fire alarm) is for the fire officer to agree, and it gets agreed before the lock is specified.

More than two doors: run them off a controller. A standalone keypad stores its users locally, so deleting a leaver means a walk round the site with the master card, door by door. A controller holds one list, logs who opened what and when, and its dry contact output into an NVR alarm input bookmarks every door event on the footage. On a small commercial site, no other integration is as useful. Issuing printed staff cards instead of fobs? The card printer on this range prints in-house, but encoding is a separate step: pair printed cards with fobs, or spec an encoding-capable printer.

Frequently asked questions

125kHz or 13.56MHz fobs: what’s the difference?

125kHz (EM4100 / EM4102, sold as “proximity” or “ID”) transmits a fixed number, and a cheap duplicator clones it. 13.56MHz (MIFARE / NFC, ISO14443A) runs an encrypted exchange: much harder to copy. Each reader takes one frequency only, so match fob to reader: identical to look at, not interchangeable.

What holding force should I spec?

Size to the door, and to single leaf versus pair. Alignment counts as much as the rating: the figure is a straight pull on an armature seated flat on the magnet, so on inward-opening and glass doors, getting the bracket right beats going up a size.

Fail-safe or fail-secure: which is a maglock?

Fail-safe, every time: no power, door open. Correct on an escape route, and the reason a maglock is the wrong spec where a store room or comms room has to hold through a power cut.

Maglock on a fire escape door: allowed?

Only with a compliant release, in three parts: an emergency release cutting lock power directly, not via the controller; a request-to-exit device; and a fire alarm link, which many doors need. Requirements vary by building and with the responsible person’s risk assessment, so it gets agreed with the fire officer before install.

Controller or standalone keypad?

Standalone does the job for one or two doors with a stable user list. Several doors, staff turnover, or a client who needs to prove who opened what and when: fit a controller. One user list, one place to delete a leaver, a full event log.

Will access control trigger the NVR?

Yes. Controller dry contact into an NVR alarm input: every door event bookmarks the footage. No scrubbing through days of recording; the clip turns up in seconds.