Manufacturer's photos. Where a power lead is pictured, an AU one is provided.
USL-Relay-EU Ubiquiti Compact SuperLink Relay (EU Version)
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Description
Description
Please note that there are two versions of the Superlink these will work with models that show CA or UK markings on the back of the device (second photo in images)
The UniFi Protect Relay is a compact SuperLink‑enabled module designed to integrate effortlessly with third‑party sensors and signalling devices.
Featuring versatile I/O interfaces, it allows you to expand your UniFi security ecosystem with reliable, responsive automation. Ideal for triggering external equipment or bridging non‑UniFi hardware into your Protect setup, it delivers seamless interoperability in a small, efficient form factor.
What power input does the Relay support?
The Relay supports a wide input voltage range from 12 V to 48 V DC, allowing it to be powered by common security system power supplies, battery systems, or industrial DC sources.
What mounting options are supported by the Relay?
The Relay supports DIN rail mounting and wall mounting using screws or adhesive, allowing flexible installation inside electrical cabinets, control panels, or directly on flat surfaces near connected devices.
How many inputs and outputs does the Relay have?
The Relay includes:
- 2 dry contact inputs for monitoring external devices or sensors
- 2 relay outputs for switching connected equipment
Each input and output can be configured independently in UniFi Protect.
How are the relay outputs controlled?
The relay outputs can be directly linked to input actions or controlled through UniFi Protect using Alarm Manager.
What types of devices can be connected to the Relay outputs?
The relay outputs support dry contact switching, making them compatible with many automation and security devices, including:
- Alarm sirens
- Third-party doorbell chimes
- Garage door controllers
- Lighting control systems
- Water shutoff valves
Always verify the electrical requirements of the connected device.
What types of loads are supported by the relay outputs?
The relay outputs support switching a wide range of electrical loads commonly used in automation and security systems, including:
- Resistive loads, such as incandescent lights, heaters, or other purely resistive devices
- Capacitive loads, such as electronic equipment or devices with capacitor banks
- Inductive loads, such as transformers, fans, motors, and appliances
When switching inductive loads, it is recommended to use appropriate suppression components, such as an RC snubber, to reduce electrical noise and protect the relay contacts.
What types of signals can the inputs detect?
The inputs are designed for dry contact signals and can monitor devices such as:
- Door or window contacts
- Motion detectors
- Light switches
- Push buttons
- Feedback contacts on connected devices
- Other automation sensors
Specifications24 specifications · 4 sections
| Overview | |
|---|---|
| Dimensions | 50 x 47.6 x 28 mm (2 × 1.9 × 1.1") |
| Mounting | Adhesive, wall and DIN rail mount |
| UniFi Application Suite | Protect |
| Performance | |
| Connectivity | SuperLink (Proprietary) |
| Operating Frequency · US | 915.6–927.6 MHz |
| Operating Frequency · EU | 865.1–869.5 MHz |
| Max. TX Power · SuperLink | 14 dBm |
| Max. Range · SuperLink | 2 km (1.2 mi) |
| Hardware | |
| Max. Power Consumption | 0.83W |
| Supported Voltage Range | 12–48V DC |
| Power Method | 12V DC / 24V DC / 48V DC |
| Weight | 100 g (3.5 oz) |
| Enclosure Material | Polycarbonate |
| Mount Material | Polycarbonate |
| Buttons | (1) Factory reset / (1) Test button |
| Terminal Blocks · Output | O1/COM/O2 / Dry contact only (12-48V DC, 12-240V AC) / 10A/port, UL total max: 12A / IEC total max: 16A |
| Terminal Blocks · Input | I1/I2 / Dry contact only / Open/Short (GND) / Integrated 5V TVS protection |
| Terminal Blocks · Power | VDD/GND / 12–48V DC, max. 48V / Integrated over-temperature protection (OTP) at 85°C (185°F) |
| LEDs | (1) LoRa, Status: RGBW / (2) Signal input, Relay output: W |
| Ambient Operating Temperature | 0 to 40° C (32 to 104° F) |
| Ambient Operating Humidity | 10 to 90% noncondensing |
| Certifications | CE, FCC, IC |
| Software | |
| Application Requirements · Web Application | UniFi Protect |
| Application Requirements · Mobile App | UniFi Protect iOS™ and Android™ |
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