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Relays allow you to control and automate electric locks, gates, boilers, and other appliances using the Ajax apps. Use scenarios to set up automation workflows on schedule or in response to detector alarms and changes of the system modes.

Pulse 0.5–255 seconds
Power supply 7–24 V DC
Dry contact

Flexibility at the core

Settings versatility and low power consumption make Relay a universal tool for equipment control. Dry contact is not galvanically connected to the device power supply so that it can be used both in low-voltage and household networks. There are bistable and pulse modes. The relay can be easily connected to a power supply unit paired with a backup battery. Set the automatic water shut off in case the washing machine breaks or a pipe bursts. Control the water supply at the facility remotely or set up a schedule, control opening-closing via the app or using Button, block access to premises by alarm or Night Mode activation and sleep calmly.

Installation and set up

Connecting Relay to the hub takes less than a minute — it’s enough to scan a QR code with the Ajax app. The miniature device (39×33×18 mm) fits easily into a junction box, an electrical panel, or a switching unit body. And the flexible external antenna provides stable connectivity.

See the full manual




Radio channel relay unit

Device type


Installation method

Into electric switchboard, junction box


Operates with all Ajax hubs, and range extenders

Actuating element

Electromagnetic relay

Service life

10 years, 200,000 Relay switch-ons

Voltage protection

Max — 36.5 V, min — 6.5 V

Maximum load current

5A at 36V DC, 13A at 230V AC

Max. current protection


Max. temp. protection

> > 65°C at the place of installation

Electric power meter function


Energy consumption parameter check


Power supply

7 – 24 V (DC only)

Operation modes

Impulse Bistable

Contact state

Normally open Normally closed

Pulse duration

0,5–255 s

Jeweller radio technology

Block encryption based on AES algorithm, Communication range with central unit — up to 1,000 m in an open space, Device scanning period — 12 – 300 s, Operating frequencies — 868.0 – 868.6 MHz, Self-adjusting RF output power — up to 25 mW, Two-way communication between devices

Operating temp. range

From 0°С to +64°С

Operating humidity

Up to 75%

Protection class of body



Jamming detection, Protection against fraud

Remote configuration and testing



39 × 33 × 18 mm


25 g


Replacement and repair within 24 months of the date of sale.

Complete set

Installation set, Relay, User's guide