NexaKey NX-V543-FW Dynamic Face Recognition Access Control Terminal

NexaKey NX-V543-FW AI Face Recognition Access Control Overview

The NexaKey NX-V543-FW is a 4.3-inch AI dynamic face recognition access control and time attendance terminal from the VERO 5 series. It recognises a face in under 0.2 seconds at 0.5 to 2.5 metres and supports face, fingerprint, 125 kHz EM card, password, and QR code verification.

The door model. Compact 4.3-inch body and the fuller access control interface — fire alarm input, doorbell, and anti-passback built in.

Key features

• Full access control I/O — including a fire alarm input. This is what separates the VERO 5 from most terminals of its size: relay output, alarm output, dedicated fire alarm input, doorbell, door sensor, exit button, and anti-passback, plus Wiegand 26/34 in and out. The fire input matters legally — on an escape-route door the lock must release when the alarm sounds, and a terminal without that input cannot do it without extra hardware.
• Anti-passback built into the device — Anti-passback stops one credential being used twice in the same direction — the standard defence against a card passed back through a fence or one face admitting a colleague. Most terminals this size leave it to a controller. Having it on board means a single-door installation gets the feature without buying a panel.
• <0.2 seconds at 0.5–2.5 m with 99.70% published accuracy — The recognition engine is identical to the flagship VERO 7 — same speed, same range, same five-at-once capability. The 99.70% figure is published, which most competing datasheets at this price omit entirely. Worth asking for on anything you compare against.
• Dual camera with a 2MP infrared live channel — 2MP colour on a 1/2.9″ sensor at 75° FOV with WDR, paired with a 2MP infrared live camera. Infrared rejects printed photographs and video, and it is what allows recognition in a dark corridor.
• Attendance reports straight to a USB flash drive — Plug a U-disk into the Type-A port and take the report away. No PC, no network, no software. For a small office or a site with no IT support, this is often how the system actually gets used.
• Compact 187.5 × 87.5 mm body — Considerably smaller than the 8-inch VERO 7. That matters on a narrow door frame, a glass-door mullion or a lift lobby where a large terminal would not fit or would look wrong.
• Mask detection and QR visitor access — Detects whether a mask is worn and still recognises the face with one on — for hospitals, clean rooms and food production. Visitors scan a QR code through the camera with no enrolment required.
• Free SDK and four documented API methods — HTTP/HTTPS, MQTT/MQTTS, WebSocket and Webserver, plus a free SDK. MQTT pushes events in real time rather than on a polling schedule.