1. Introduction
The XY-J02 is a versatile 1-channel 5V time delay relay module designed for various control applications. It features a digital display for easy time setting and supports trigger-activated ON/OFF switching and timing cycles. This manual provides detailed instructions for its setup, operation, and maintenance.


2. Product Features
- Wide voltage power supply (6.0V-30V) or Micro USB 5V.
- Adjustable timing range from 0 to 999 minutes.
- Digital display for clear time settings.
- Multiple operating modes including delay ON, delay OFF, and cycle timing.
- Trigger input for external control (3-24V).
- High-current relay output (10A 250VAC / 10A 30VDC).
- Compact design.
3. Components Overview
Familiarize yourself with the main components of the XY-J02 module:

| Component | Description |
|---|---|
| Input + / Input - | Power supply input terminals (6.0V-30V DC). |
| Micro USB | Alternative 5V DC power supply input. |
| Trigger Signal | Input for external trigger (3-24V). |
| NO (Normally Open) | Relay output terminal. Connects to COM when relay is active. |
| COM (Common) | Relay output terminal. Common connection for the controlled device. |
| NC (Normally Closed) | Relay output terminal. Connects to COM when relay is inactive. |
| Digital Display | Shows current time setting or operating mode. |
| SET Button | Enters/confirms setting mode. |
| UP Button | Increases value or navigates menu. |
| DOWN Button | Decreases value or navigates menu. |
| STOP Button | Emergency stop or exits setting mode. |
| Transposition Protection | Indicates reverse polarity protection for power input. |
4. Setup and Wiring
Before connecting, ensure all power sources are disconnected. Incorrect wiring can damage the module or connected devices.
4.1 Power Supply Connection
- Option 1 (Screw Terminals): Connect a DC power supply (6.0V-30V) to the "Input +" and "Input -" terminals. Ensure correct polarity.
- Option 2 (Micro USB): Connect a 5V DC power supply via the Micro USB port.
Warning: Do not connect both power options simultaneously.
4.2 Trigger Signal Connection
Connect your trigger source (3-24V) to the "Trigger Signal" terminal. The trigger can be a momentary pulse or a sustained voltage, depending on the operating mode.
4.3 Device Connection (Relay Output)
The relay has three terminals: NO (Normally Open), COM (Common), and NC (Normally Closed). Choose the appropriate connection based on whether you want the device to be ON or OFF when the relay is inactive.
- Normally Open (NO): Connect your device between NO and COM. The device will be OFF when the relay is inactive and ON when the relay is active.
- Normally Closed (NC): Connect your device between NC and COM. The device will be ON when the relay is inactive and OFF when the relay is active.
4.4 Wiring Diagrams


5. Operating Instructions
The XY-J02 module offers various operating modes and timing settings. The digital display shows the current time or mode.
5.1 Powering On
Once correctly wired, apply power. The digital display will light up, showing the last set time or current operating mode.
5.2 Setting Operating Mode and Time
- Enter Setting Mode: Press and hold the SET button for a few seconds until the display starts flashing or shows a mode indicator (e.g., "P1.1", "P1.2", etc.).
- Select Mode: Use the UP and DOWN buttons to cycle through the available operating modes. (Specific modes are not detailed in provided data, but common ones include: P1.1: Trigger ON, delay OFF; P1.2: Trigger ON, delay ON; P1.3: Trigger ON, then cycle; P2.1: Power ON delay; P3.1: Cycle timer).
- Set Time Parameters: Once a mode is selected, press SET to confirm. The display will then show time parameters (e.g., "OP" for ON time, "CL" for OFF time, "LOP" for loop count). Use UP and DOWN to adjust the values.
- Time Unit Selection: While adjusting time, a short press of the SET button might change the time unit (e.g., seconds, minutes, hours). Look for a decimal point on the display:
XXX.(decimal point in hundreds place): 0-999 secondsXX.X(decimal point in tens place): 0-99.9 secondsX.X.X(no decimal point): 0-999 minutes
- Time Unit Selection: While adjusting time, a short press of the SET button might change the time unit (e.g., seconds, minutes, hours). Look for a decimal point on the display:
- Save Settings: After setting all parameters for the chosen mode, press and hold the SET button again until the display stops flashing and returns to normal operation.
5.3 Emergency Stop / Pause
The STOP button can be used to immediately halt the current timing operation. Pressing it again may resume or reset the module, depending on the mode.
5.4 Trigger Reset
In modes that respond to a trigger, a new trigger signal will typically restart the timing sequence. If the timer is already running, a new trigger might reset the timer or be ignored, depending on the specific mode's logic. Refer to the mode descriptions (if available) for precise behavior. To ensure a full reset, it's often best to stop the current operation (if possible) before applying a new trigger.
6. Specifications
| Parameter | Value |
|---|---|
| Model | XY-J02 |
| Operating Voltage | 6.0V-30V DC (via screw terminals) or 5V DC (via Micro USB) |
| Trigger Signal Voltage | 3V-24V DC |
| Relay Contact Rating | 10A 250VAC / 10A 30VDC |
| Timing Range | 0-999 seconds / 0-99.9 seconds / 0-999 minutes (selectable) |
| Operating Temperature | -20°C to 70°C (typical) |
| Type | Module |
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Module does not power on. | No power, incorrect voltage, reverse polarity, faulty cable. | Check power supply (6-30V DC or 5V Micro USB). Verify polarity. Try a different power source or cable. |
| Relay does not activate/deactivate. | Incorrect wiring, trigger signal issue, incorrect mode setting. | Review wiring diagrams (Figure 4, Figure 5). Ensure trigger signal is within 3-24V. Check operating mode and time settings. |
| Timing is inaccurate or inconsistent. | Incorrect time unit selected, external interference. | Verify the time unit (seconds, 0.1 seconds, minutes) is correctly set. Ensure stable power supply and minimize electrical noise. |
| Trigger does not reset the timer. | Operating mode does not support re-triggering, trigger signal too short/long. | Check the specific behavior of the selected operating mode. Some modes require the current cycle to complete before a new trigger is accepted. Ensure the trigger signal meets the module's requirements. |
8. User Tips
- Understanding Trigger Reset: If your application requires the timer to reset immediately upon a new trigger, ensure you select an operating mode that supports this behavior. Some modes might ignore subsequent triggers until the current cycle finishes. Experiment with different modes to find the one that best suits your needs.
- Power Supply Stability: For reliable operation, especially with sensitive loads, use a stable and regulated DC power supply within the specified voltage range.
- Clear Wiring: Always double-check your wiring against the provided diagrams before applying power to prevent damage.
9. Maintenance and Care
- Keep the module clean and free from dust and moisture.
- Avoid exposing the module to extreme temperatures or direct sunlight.
- Do not attempt to modify the module, as this may void any implied warranty and could lead to malfunction.
- Store in a dry, anti-static environment when not in use.
10. Warranty and Support
This product is typically covered by a standard manufacturer's warranty against defects in materials and workmanship for a period of one year from the date of purchase. Please retain your proof of purchase for warranty claims.
For technical support or further inquiries, please contact your retailer or the manufacturer directly. Provide the model number (XY-J02) and a detailed description of your issue for efficient assistance.
Disclaimer: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.





