UniFi Access - Wiring Door Lock to UniFi Access Control Hub
This article explains how to wire fail-safe and fail-secure locks to UniFi Access Control Hubs. For more details on lock requirements and selection tips, click here. If you've already wired your terminals and are looking for configuration instructions within UniFi Access, click here. For more general information on a hub's input/output terminals, click here.
Powering Your Locks
All UniFi Access Control Hubs have two methods for powering your locks:
- 12V-1A: Use this terminal to directly power electric locks requiring 12V DC and up to 1 Amp.
- NO POWER (DRY): Use this terminal with an external transformer for locks requiring power other than 12V DC, such as 24V DC locks.
Note: Do not use locks that require AC power.
Connecting Fail-Safe Locks
A UniFi Magnetic Lock (i.e., fail-safe lock) operates by using a continuous electric current to stay locked. Here is how it works:
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Locked State: When connected to the NC (Normally Closed) and COM (Common) terminals of a hub's powered relay, electric current flows through the lock. This keeps the lock engaged and secure.
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Unlocked State: When an unlock event is triggered, the relay switches to the open position, interrupting the flow of electricity. The lock then releases, transitioning to the unlocked state.
For a detailed wiring guide, see UA-Lock-Magnetic-270kg or UA-Lock-Magnetic-540kg.
Connecting Fail-Secure Locks
A UniFi Electric Lock (i.e., fail-secure lock) remains locked without power and unlocks only when electricity is applied. Here is how it works:
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Locked State: When connected to the NO (Normally Open) and COM (Common) terminals of a hub's powered relay, no electric current flows through the lock. This keeps the lock in its locked position.
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Unlocked State: When an unlock event is triggered, the relay switches to the closed position, allowing electric current to flow through the lock. This energizes the lock and transitions it to the unlocked state.
For a detailed wiring guide, click here.
Advanced Input/Output Terminals
For more information on a hub's input/output terminals, including a detailed explanation of Normally Opened (NO) and Normally Closed (NC), click here.
Important Wiring Reminders
For Double Door Magnetic Locks
For double-door magnetic locks requiring more power, using a 12V DC supply may exceed a 1A current draw. To meet specifications and reduce current, connect to the hub's DRY relay terminal with an external 24V power source.
For POWERED Relay Terminal
The hub's POWERED relay terminal outputs 12V DC and must not be connected to an additional external power source. Combining another 12V DC source with the relay's output can cause damage to the hub.
For DRY Relay Terminal
The hub's DRY relay terminal supports up to 30V DC and 1A. Ensure that any external devices connected do not exceed these limits to prevent damage to the hub.