Hotel door locks are connected to room lighting through a key-card (energy-saver) switch system, where the room's lighting and power work only when the guest inserts the card into the switch mounted near the door. This system saves energy and improves security.
Quick answer: An energy-saver (key-card) switch is installed inside the room near the door and wired through a relay/contactor to the room's lighting circuit; inserting the card closes the circuit and turns on the lights, and removing it cuts power after a short delay.
How does the system work?
The electronic lock on the door verifies the card for entry, while the internal key-card switch controls power and lighting. Some systems link the lock and switch together; others separate them with a single guest card.
System components
- Electronic lock: RFID or magnetic, on the door.
- Key-card (energy-saver) switch: mounted inside the room near the door.
- Relay/contactor: connects and disconnects the lighting circuit per the switch's signal.
- Delay timer: keeps the lights on for seconds after the card is removed.
Installation and wiring steps
- Switch off the power to the room circuit before starting.
- Mount the key-card switch inside the room near the door at a suitable height.
- Connect the switch output to the relay/contactor coil controlling the lighting circuit.
- Route the lighting circuit (and required sockets) through the relay contacts.
- Set the delay timer if present for a comfortable shut-off after leaving.
- Install the electronic lock on the door and program the cards.
- Test the system by inserting and removing the card and confirming lighting and cutoff.
Important notes
- Leave some essential sockets (like the fridge) outside card control.
- Use components rated for the room circuit's load.
- Follow electrical safety codes and civil-defense regulations.
Benefits of linking locks to lighting
- Energy saving: no power without a guest in the room.
- Higher security: access control and movement logging.
- Guest comfort: automatic activation on entry.
Frequently asked questions
Must the lock and switch use the same card?
It's preferred for convenience, but they can be separated depending on the system.
Do the lights turn off immediately when the card is removed?
Usually after a short delay set by the timer, to make leaving easier.
Do I need a specialized technician?
Yes; the wiring involves power circuits and lock systems and should be done by a specialist.
Conclusion
Linking door locks to lighting in hotels relies on the key-card switch and a relay to power the room only when a guest is present. Correct installation saves energy and boosts security and guest comfort.
Outfit hotel lighting systems and key-card switches at Tirtk Lighting & Electrical
Related: Hotel projects need electrical connections, sockets, switches & AC switches, plus the right lighting at Tirtk.