Relay User Manual
Updated January 27, 2021
Introduction
Relay is a wireless, low-voltage relay featuring potential-free (dry) contacts. It allows remote switching of appliances powered by a 7–24 V DC source. Relay operates in both pulse and bistable modes, communicating with a hub via Jeweller radio protocol. In line of sight, the communication distance is up to 1,000 meters.
⚠️ Regardless of the type of electrical circuit, only a qualified electrician should install Relay!
The Relay contacts are not galvanically connected to the device itself, enabling connection to input control circuits of various equipment to imitate a button, toggle switch, etc.
Compatibility and Scenarios
ℹ️ Relay is compatible only with Ajax hubs and does not support connecting via uartBridge or ocBridge Plus.
Use scenarios to program actions of automation devices (Relay, WallSwitch, or Socket) in response to an alarm, button press, or schedule. Scenarios can be created remotely in the Ajax app.
The Ajax security system can be connected to a central monitoring station of a security company.
How to create and configure a scenario in the Ajax security system
Buy low-tension relay Relay
Functional Elements
Diagram showing the Ajax Relay device. One view shows the antenna (1), power supply terminal block (2), and contacts terminal block (3). The other view shows the function button (4) and light indicator (5).
- 1. Antenna
- 2. Power supply terminal block
- 3. Contacts terminal block
- 4. Function button
- 5. Light indicator
Terminal Descriptions
- PS IN terminals: "+" and "-" contact terminals for 7-24 V DC input power supply.
- Relay terminals: Output potential-free terminals.
Operating Principle
⚠️ Do not connect Relay power supply input terminals to a voltage exceeding 36 V or alternate current sources. This creates a risk of fire and will damage the device!
⚠️ Regardless of the type of electrical circuit, only a qualified electrician should install Relay!
Relay is powered by a 7–24 V DC source, with recommended voltage values of 12 V and 24 V. Use the Ajax Security System app to connect and set up Relay.
Relay features dry (potential-free) contacts, not galvanically connected to the device. This allows Relay to imitate a button, switch, etc., in electrical circuits of various voltages (e.g., for sirens, electrical valves, electromagnetic locks). Its miniature body allows installation inside a junction box, switchboard, or switch.
Relay closes and opens contacts via user command from the app or automatically by scenario.
Relay Operation Modes
- Bistable: Relay opens or closes contact and remains in this state.
- Pulse: Relay opens or closes contacts for a pre-set time (0.5 to 255 seconds) then switches back to the initial state.
Connecting to the Hub
Before connecting the device:
- Switch on the hub and check its Internet connection (the logo glows white or green).
- Install the Ajax app. Create an account, add the hub to the app, and create at least one room.
- Ensure the hub is not armed and is not updating by checking its status in the Ajax app.
- Connect Relay to a 12 or 24 V power supply.
ℹ️ Only users with administrator rights can add a device to the app.
To pair Relay with a hub:
- Click "Add device" in the Ajax app.
- Name the device, scan its QR code (located on the case and packaging), or enter it manually, and select the room.
- Click "Add" – the countdown will begin.
- Press the functional button.
For detection and pairing, the device must be within the hub's wireless network coverage area. The connection request is transmitted only when the device is switched on.
If pairing fails, wait 30 seconds and retry. Relay will appear in the list of hub devices.
Device status updates depend on the ping interval set in the hub settings (default is 36 seconds).
⚠️ When switching on for the first time, Relay contacts are open! When deleting Relay from the system, contacts open!
States
Device states are monitored via the Ajax app:
- Jeweller Signal Strength: Signal strength between the hub and Relay.
- Connection: Connection status between the hub and the relay.
- Routed Through ReX: Displays the status of using the ReX range extender.
- Active: State of the relay contacts (closed / open).
- Voltage: The current input voltage.
- Temporary Deactivation: Displays the status of the device: active or completely disabled by the user.
- Firmware: Device firmware version.
- Device ID: Device identifier.
Settings
Configure Relay settings via the Ajax app:
| Setting | Value/Description |
|---|---|
| First field (Device Name) | Device name, can be edited. |
| Room | Selecting the virtual room to which the device is assigned. |
| Relay Mode | Choosing the relay operation mode:
|
| Contact State | Normal contact state:
|
| Pulse duration, sec | Selecting the pulse duration in the pulse mode: From 0.5 to 255 seconds. |
| Scenarios | Opens the menu for creating and configuring scenarios. Learn more |
| Jeweller Signal Strength Test | Switches the relay to the signal strength test mode. |
| User Guide | Opens the Relay User Manual. |
| Temporary Deactivation | Allows a user to deactivate the device without removing it from the system. The device will not execute system commands and participate in automation scenarios. All notifications and alarms will be ignored. ⚠️ Please note that deactivated device will save its current state (active or inactive). |
| Unpair Device | Disconnect Relay from a hub and delete its settings. |
Protection
Voltage protection: The contact will open when the voltage exceeds the limits of 6.5–36.5 V.
Temperature protection: The contact will be opened when the temperature threshold of 85°C inside Relay is reached.
Indication
The Relay light indicator can light green depending on the device status. When not paired with the hub, the light indicator blinks periodically. When the functional button is pressed, the light indicator lights up.
Functionality Testing
The Ajax security system allows conducting tests for checking the functionality of connected devices. Tests do not start immediately but within a period of 36 seconds when using default settings. The test start time depends on the detector ping interval settings (found in the Jeweller menu in the hub settings).
Installation of the Device
⚠️ Regardless of the type of electrical circuit, only a qualified electrician should install Relay!
The communication range with the hub in line of sight is up to 1,000 meters. Consider this when choosing the location for Relay.
If the device has a low or unstable signal strength, use the ReX radio signal range extender.
Installation process:
- De-energize the cable to which Relay will be connected.
- Connect the grid wire to the Relay terminals according to the provided scheme.
When installing Relay in a box, lead out the antenna and place it under the plastic frame of the socket. Increasing the distance between the antenna and metal structures reduces the risk of radio signal interference.
⚠️ Do not shorten the antenna! Its length is optimal for operation within the used radio frequency range!
General Safety and Restrictions
During installation and operation of Relay, follow general electrical safety rules and regulatory acts.
It is strictly forbidden to disassemble the device or use it with damaged power cables.
Do not install the relay:
- Outdoors.
- In metal wiring boxes and electrical panels.
- In places with temperature and humidity exceeding permissible limits.
- Closer than 1 meter to a hub.
Maintenance
The device does not require maintenance.
Technical Specifications
| Parameter | Value |
|---|---|
| Actuating element | Electromagnetic relay |
| The service life of the relay | 200,000 switchings |
| Supply voltage range | 7 – 24 V (DC only) |
| Voltage protection | Yes, min – 6.5 V, max – 36.5 V |
| Maximum load current* | 5 A at 36 V DC, 13 A at 230 V AC |
| Operating modes | Pulse and bistable |
| Pulse duration | 0.5 to 255 seconds |
| Maximum current protection | No |
| Parameter control | Yes (voltage) |
| Device energy consumption | Less than 1 W |
| Frequency band | 868.0–868.6 MHz or 868.7–869.2 MHz depending on the region of sale |
| Compatibility | Operates only with all Ajax hubs, and range extenders |
| Effective radiated power | 3.99 mW (6.01 dBm), limit – 25 mW |
| Modulation of the radio signal | GFSK |
| Maximum distance between the device and the Hub | Up to 1000 m (any obstacles absent) |
| Communication ping with the receiver | 12 – 300 sec (36 sec default) |
| Shell protection rating | IP20 |
| Operating temperature range | From 0°C to +64°C (ambient) |
| Max. temperature protection | Yes, over 65°C at the place of installation or over 85°C inside the Relay |
| Operating humidity | Up to 75% |
| Dimensions | 39 x 33 x 18 mm |
| Weight | 25 g |
⚠️ If using inductive or capacitive load, the maximum commutated current decreases to 3 A at 24 V DC and to 8 A at 230 V AC!
Complete Set
- Relay
- Connecting wires – 2 pcs
- Quick Start Guide
Warranty
Warranty for the "AJAX SYSTEMS MANUFACTURING" LIMITED LIABILITY COMPANY products is valid for 2 years after the purchase.
Support
If the device does not work correctly, contact the support service. Technical issues can often be solved remotely.
Technical support: support@ajax.systems
End user agreement - Ajax Systems
