Dry contact relay to control 12-24 V⎓ power supply remotely

The impulse for smart security

Flood-prevention system

Flood-prevention system

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.
Automatic gates / barrier

Automatic gates / barrier

Control appliances via the app or using Button. No compromises in comfort and safety.
Electric lock

Electric lock

Lock or unlock doors with the app or Button. Block access to premises by alarm or Night Mode activation and sleep calmly.
Security smoke cannon

Security smoke cannon

Set up the smoke cannon triggered by any detector alarm or DoubleButton hold-up device activation. Such a system reliably shelters people and valuables from burglars.
Roller blinds / motorized curtains

Roller blinds / motorized curtains

Control the equipment remotely through the app, via Button, or set a scenario: when changing the security mode, according to the time of day, or by alarm activation.
ACS blocking

ACS blocking

Set up Access Control System (ACS) reader blocking when arming the system to prevent employee access to the guarded premises and avoid false alarms.

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.
  • Pulse 1–255 seconds
  • Power supply 7–24 V DC
  • Dry contact

No extra effort

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 with DIN Holder. And the flexible external antenna provides stable connectivity.

DIN Holder

Bracket to fix Relay or WallSwitch on DIN rail
Din Holder

Always in touch

We developed the Jeweller radio protocol to ensure uninterrupted interaction of all security system devices. The radio protocol uses frames to synchronize device communication, authentication to prevent forgery, and encryption to protect against hacking.
  • Two-way communication at a distance of up to 1000 meters
  • 5 radio signal range extenders in the system
  • Command delivery in
    0,15 s
  • Adjustable ping from
    12 s

Smart security for home and business

Use automation scenarios so your security system not only reports threats but also actively counters them.
  • Water
  • LeaksProtect
  • Relay
  • Electrovalve
  • Schedule
  • Relay
  • Electrovalve
  • Arming
  • Relay
  • Electric lock
  • Schedule
  • Relay
  • Roller shutters
  • Schedule
  • Relay
  • Heating


Power relay to control 110/230 V~ power supply remotely
Professional installation

Professional installation

Qualified engineers guarantee the quality installation of devices and disclosure of all the features of your security system. Contact a certified Ajax partner for help.

Tech specs

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
Relay service life
200,000 switch-ons
Voltage protection
Max — 36.5 V⎓, min — 6.5 V⎓
Maximum load current
5A at 24V⎓, 13A at 230V~
Maximum current protection
Maximum temperature 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
Contact state
Normally open
Normally closed
Adjustable pulse duration
1–255 sec
Jeweller radio technology
Communication range with central unit — up to 1,000 m in an open space
Two-way communication between devices

Radio frequency bands:
866.0 – 866.5 MHz
868.0 – 868.6 MHz
868.7 – 869.2 MHz
905.0 – 926.5 MHz
915.85 – 926.5 MHz
921.0 – 922.0 MHz
(depends on the region of sale)

Self-adjusting RF output power — up to 20 mW
Block encryption based on AES algorithm
Device scanning period — 12–300 s

Learn more about Jeweller
Operating temperature range
From –20°С to +64°С
Permissible humidity
Up to 85%
Protection class of body
Protection against fraud
Jamming detection
Remote setting and testing
39 × 33 × 18 mm
25 g
Replacement and repair within 24 months of the date of sale.
Complete set
Installation kit
Quick Start Guide

Choose the most suitable Ajax set in 2 minutes

Tell us what you need to protect and we will put together a set of detectors and devices for your premises.

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