Overview
The Ubiquiti USL-RELAY-US is a compact SuperLink relay designed to integrate third-party sensors and signaling devices with UniFi Protect. It provides wireless SuperLink connectivity together with two signal inputs and two relay outputs for flexible control and monitoring applications.
This US version operates on the SuperLink wireless band of 915.6–927.6 MHz and supports a maximum SuperLink range of up to 2 km (1.2 mi) under line-of-sight conditions. A SuperLink Gateway is required for operation.
I/O and Relay Functions
The USL-RELAY-US provides two dry-contact signal inputs, I1 and I2. The inputs detect open or short-to-ground states and include integrated 5V TVS protection.
Two relay outputs, O1/COM/O2, provide dry-contact switching. Each port supports 12–48V DC or 12–240V AC at up to 10A per port. Ubiquiti specifies a total maximum of 12A for UL applications and 16A under IEC specifications.
Power and Connectivity
The relay is powered through its VDD/GND terminals using 12–48V DC, with a maximum supported voltage of 48V. Integrated over-temperature protection activates at 85°C (185°F). Communication uses Ubiquiti's proprietary SuperLink wireless technology.
Installation and Construction
The compact enclosure measures 50 x 47.6 x 28 mm and weighs 100 g. The unit supports adhesive, wall, and DIN rail mounting. Both the enclosure and mounting material are polycarbonate.
Key Features
- Proprietary SuperLink wireless connectivity for UniFi Protect
- Two dry-contact signal inputs with 5V TVS protection
- Two dry-contact relay outputs rated up to 10A per port
- 12–48V DC power input with over-temperature protection
- Adhesive, wall, and DIN rail mounting options
Applications
The USL-RELAY-US is intended for integrating compatible third-party sensors, switches, and signaling devices into UniFi Protect deployments. Its dual inputs and relay outputs can be used where wireless monitoring or switching is required without running a dedicated signal cable back to the gateway.
DC Supplies Product Note
The USL-RELAY-US is the US-frequency variant of the SuperLink Relay. Because the relay requires a SuperLink Gateway and uses separate DC power terminals rather than PoE, the gateway and an appropriate 12–48V DC power source should be accounted for when planning the installation.
Specifications
| Specification | Details |
|---|
| Brand | Ubiquiti |
| Part Number / MPN | USL-RELAY-US |
| Product Type | SuperLink Relay |
| UniFi Application Suite | Protect |
| Wireless Connectivity | SuperLink (Proprietary) |
| US Operating Frequency | 915.6–927.6 MHz |
| Maximum TX Power | 14 dBm |
| Maximum SuperLink Range | 2 km (1.2 mi) line of sight |
| Power Method | 12V DC / 24V DC / 48V DC |
| Power Input | VDD/GND, 12–48V DC, maximum 48V |
| Signal Inputs | I1/I2 dry contact, open/short to GND |
| Input Protection | Integrated 5V TVS protection |
| Relay Outputs | O1/COM/O2 dry contact |
| Output Voltage Rating | 12–48V DC, 12–240V AC |
| Output Current | 10A per port |
| UL Total Current Maximum | 12A |
| IEC Total Current Maximum | 16A |
| Over-Temperature Protection | 85°C (185°F) |
| Mounting | Adhesive, wall, DIN rail |
| Enclosure Material | Polycarbonate |
| Mount Material | Polycarbonate |
| Dimensions | 50 x 47.6 x 28 mm (2 x 1.9 x 1.1 in) |
| Weight | 100 g (3.5 oz) |
| Operating Temperature | 0 to 40°C (32 to 104°F) |
| Operating Humidity | 10–90% noncondensing |
| Certifications | CE, FCC, IC |
| NDAA Compliant | Yes |
FAQs
What is the Ubiquiti USL-RELAY-US used for?
The USL-RELAY-US is a SuperLink relay for integrating third-party sensors and signaling devices with UniFi Protect.
Does the USL-RELAY-US require a SuperLink Gateway?
Yes. Ubiquiti specifies that a SuperLink Gateway is required for the relay to operate.
How many inputs and outputs does the relay have?
The relay provides two dry-contact signal inputs and two dry-contact relay outputs.
What power supply does the USL-RELAY-US use?
The relay accepts 12–48V DC through its VDD/GND power terminals, with a maximum supported voltage of 48V.
What is the relay output rating?
Each relay output supports 12–48V DC or 12–240V AC at up to 10A per port. Total limits are 12A for UL applications and 16A under IEC specifications.
How far can the SuperLink relay communicate?
Ubiquiti specifies a maximum SuperLink range of up to 2 km (1.2 mi) under line-of-sight conditions.
