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
An existing gate contact reports into Protect; the relay can fire the opener.
Old signalling hardware keeps working, now triggered by UniFi events.
Dry-contact equipment alarms surface as Protect notifications.
Anywhere a sensor exists but a network cable never will.
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Authorised Ubiquiti reseller: genuine Australian stock, full warranty, competitive prices and price match available.
Full specifications
| Role | SuperLink I/O module — third-party sensors and signalling into UniFi Protect |
| I/O | Signal inputs + relay output (terminal block) · input/output status LEDs |
| Radio | SuperLink (proprietary low-power) · RP-SMA antenna connector |
| Power | 12V / 24V / 48V DC · max 3.4W |
| Controls | Test button · factory reset · RGBW status LED |
| Mounting | Adhesive, wall screws or DIN rail · indoor |
| Size / weight | 50 × 47.6 × 28 mm · 100 g · polycarbonate |
| Environment | 0–40°C · 10–90% humidity · CE, FCC, IC |
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.
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UniFi gateways, switches, Wi-Fi, Protect cameras and Access. Genuine Australian stock with the full manufacturer's warranty, competitive prices and price match available.
Frequently asked questions
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.
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.
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.
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.
From ARC IP Networks (arcip.com.au), an authorised Ubiquiti reseller in Australia — genuine Australian stock with the full manufacturer warranty, claimable locally.
Who we are
About ARC IP Networks
ARC IP Networks is an Australian supplier of networking, Wi-Fi and gateway equipment, based in Blackburn, Melbourne, Victoria. We work with homeowners, installers, integrators and businesses across Australia, supplying Ubiquiti UniFi, MikroTik, TP-Link, Ruijie, Teltonika and D-Link.
We are an authorised Ubiquiti, MikroTik, TP-Link, Ruijie, Teltonika and D-Link reseller, so you get genuine Australian stock with the full manufacturer's warranty, never grey imports, at competitive prices. Our team can help you choose the right equipment, and trade customers get trade accounts and project pricing on larger jobs.
- Genuine Australian stock with the full manufacturer's warranty
- Competitive prices, price match available
- Trade accounts for installers, integrators and MSPs
- Australia-wide delivery; showroom in Blackburn, Mon–Fri 9–5 (demos by appointment)
Need help choosing?
Tell the ARC IP Networks team what you are trying to achieve and we will recommend the right equipment and quote it as one order.