Relay maximum resistive load is 5 A at 36 V⎓ and 13 A at 230 V~.
Ajax Relay 7-24Vdc
R746
Relay is a dry contact relay to control a power supply remotely. The relay’s dry contacts are electrically isolated to the power supply circuit of the device. Relay can be used in both low-voltage and domestic power grids. The device features two types of protection: voltage and temperature.
Description
Relay is a dry contact relay to control a power supply remotely. The relay’s dry contacts are electrically isolated to the power supply circuit of the device. Relay can be used in both low-voltage and domestic power grids. The device features two types of protection: voltage and temperature.
Relay is connected to the Ajax security system via the Jeweller radio protocol. The communication range is up to 1,000 meters in an open space. The device works only with Ajax radio signal range extenders and hubs.
Operating principle
Relay is a dry contact relay to control a power supply remotely. The relay is installed in the electrical circuit gap to control the power supply of devices connected to this circuit. Relay is controlled via the device function button (by pressing and holding it for 2 seconds), the Ajax app, Button, and automation scenarios.
Relay is powered by a 7–24 V⎓ power supply. Recommended power supply voltages: 12 V⎓ and 24 V⎓.
Relay features potential-free (dry) contacts. Dry contacts are electrically isolated to the relay’s power supply. Thus, this device can be used in low-voltage and household networks, for example, to simulate a button, a toggle switch, or to control water shut-off valves, electromagnetic locks, irrigation systems, gates, barriers, and other systems.
Relay commutes one single pole of the electrical circuit. The relay can operate in bistable or pulse mode. In pulse mode, you can set its duration: from 0.5 to 255 seconds. The operating mode is selected by users or PRO with admin rights in the Ajax apps.
A user or a PRO with admin rights can select the normal state of the relay contacts:
- Normally closed — the relay stops supplying power when activated and resumes when deactivated.
- Normally open — the relay supplies power when activated and stops when deactivated.
Relay measures supply voltage. This data, along with other operating parameters of the relay, is available in the device States. Relay states update frequency depends on the Jeweller or Jeweller/Fibra settings. The default value is 36 seconds.
Automation scenarios
Ajax’s scenarios offer a new level of security. With them, the security system not only notifies about threats, but also actively resists them.
Scenario types with Relay and examples of usage:
- By alarm. Lighting is switched on when an opening detector activates the alarm.
- By security mode change. The electric lock is automatically blocked when the object is armed.
- By schedule. The irrigation system in the yard is switched on according to the schedule at the specified time. Lighting and TV are switched on when the owners are away, so the house doesn’t seem empty.
- By pressing Button. Switching on night lighting by pressing the smart button.
- By temperature. The heating is turned on when the temperature in the room is lower than 20°C.
- By humidity. The humidifier is switched on when the humidity level drops below 40%.
- By CO₂ concentration. Supply ventilation is turned on when the carbon dioxide concentration level exceeds 1000 ppm.
