Every site has one: the gate contact, the old siren, the pump alarm — wired years ago, impossible to network today. The USL Relay is Ubiquiti's answer: a matchbox-sized SuperLink module with inputs and a relay output that lets third-party devices join UniFi Protect wirelessly. Available in Australia from ARC IP Networks, an authorised Ubiquiti reseller — see the product page for stock.
What is the USL Relay?
A 50 mm polycarbonate cube that translates between two worlds. On the terminal side: signal inputs and a relay output for whatever third-party hardware you point at it. On the radio side: SuperLink — the same low-power protocol behind the USL Fob — carrying those signals to a hub like the UniFi Alarm Hub. It runs on 12, 24 or 48V DC at 3.4W, mounts with adhesive, screws or DIN rail, and has a test button so commissioning doesn't involve two people shouting across a site.
What it unlocks
Full specifications
Availability in Australia
ARC IP Networks — an authorised Ubiquiti reseller in Australia — supplies the USL Relay as genuine Australian stock with the full manufacturer warranty, claimable locally. It pairs naturally with the Alarm Hub Kit and Protect cameras; installers can open a trade account, and our price match policy applies.
Frequently asked questions
What is the UniFi USL Relay?
The USL Relay is a compact SuperLink I/O module for the UniFi ecosystem: a 50 mm polycarbonate box with signal inputs and a relay output that lets third-party sensors and signalling devices — gate contacts, sirens, strobes, buzzers — join UniFi Protect wirelessly.
What can I connect to the USL Relay?
Its inputs accept third-party sensors and its relay output can switch signalling devices, so things like an existing gate contact, a legacy siren or an indicator light can trigger — or be triggered by — events in UniFi Protect.
How does the USL Relay connect to UniFi?
Over SuperLink, Ubiquiti's proprietary low-power radio, to a SuperLink-capable hub such as the UniFi Alarm Hub — so devices in awkward spots join the system without running a network cable back.
How is the USL Relay powered?
From 12V, 24V or 48V DC at just 3.4W maximum, and it mounts with adhesive, screws or a DIN rail clip — small enough to live inside an existing enclosure next to whatever it is wiring in.
Where can I buy the UniFi USL Relay in Australia?
From ARC IP Networks (arcip.com.au), an authorised Ubiquiti reseller in Australia — genuine Australian stock with the full manufacturer warranty, claimable locally.