Relay

Wireless low-tension dry contact relay

FAQ

You can do it in Relay settings:

  1. Ajax app
  2. Devices
  3. Select the device
  4. Settings
  5. In the Contact state field, select the required option: Normally Closed or Normally Open
Copied

With OS Malevich 2.9 update, temporary deactivation of devices without removing them from the system has become available. Deactivation may be necessary if the device is incorrectly installed or configured, loses connection with hub, or is defective.

To deactivate a device, go to its settings (Ajax appDevices tab → select the device you needSettings Temporary Deactivation).

Copied

Several operating modes and various contact states (normally closed or normally opened) are available for automation devices.

They can be combined depending on the wiring diagram and the type of detector that the device controls:

  • bistable, when the contacts close and open according to the switch principle;
  • pulse, when the contacts close or open for a time from 0.5 to 255 seconds, and then automatically perform the opposite action.

Pulse mode is available for WallSwitch and Socket with firmware version 5.54.1.0 or higher.

Copied

To avoid accidents and equipment failures, we equipped our Relay mechanism with protection against overheating and voltage surges. It is permanently enabled and can’t be disabled. If the temperature where the Relay is installed exceeds 65°C, or 85°C inside the device, the relay opens and sends out an alarm. As soon as the temperature returns to normal, the relay releases and sends out the respective notification.

There are two threshold values for the supply voltage: the lower value is 6.5V, and the upper value is 36.5V. If the power level is too high or too low, protection is activated, the device is disabled and a warning message is sent out. After the supply voltage parameters return to normal, the relay releases and notifies users.

Copied

By default, the hub is set to a hub–detector ping interval of 36 seconds and 30 undeliverable data packets to consider the device lost. With these settings, the hub will detect the loss of the detector in 18 minutes.

To reduce this time, go to the hub settings in the Jeweller section and change the settings. The minimum time for detecting loss of connection with the device is 36 seconds (3 polls of 12 seconds each).

The time before raising the alarm by the communication loss between hub and device is calculated with the following formula:

Ping interval * (number of undelivered packets + 1 correction packet).

Note that with the minimum ping interval, short-term interference can lead to loss of connection with the device. Therefore, set the minimum values only if it is critically important to promptly inform about events in the system.

Copied

The loop (zone) number is required to add a guarded facility to the CMS along with descriptions of all devices connected to the hub.

The loop (zone) number is available in the settings after activating the group mode in the Ajax application:

  1. Hub Settings Groups

Having selected a group, you will see a list of its devices. Each device has a Device No. (or DeviceIndex in Ajax PRO Desktop) that corresponds to the loop (zone) number. A number is assigned when a device is attached to the Hub. The first added device has the first loop (zone) number.

After a device or a detector is removed, its number will be assigned to the next added device. However, the numbering of other devices will not change.

Copied

In the Ajax app, select the «Devices» tab . Information about the firmware version and device ID is located at the very bottom of the tab with the device parameters.

Ajax mobil applications
Copied

Go to the Device tab , select the device you want to check.

ajax security system application
Copied

Featured articles

How to implement video surveillance that does not compromise privacy

How to set up a gate or barrier control using Ajax. Wiring diagrams

How to connect a smoke machine to the Ajax security system