1. Introduction
This manual provides detailed instructions for the LKHFOAQM JZ-801 Relay Board Cycle Timing Circuit Switch Timer Delay Trigger Module. This versatile module is designed for various timing and control applications, offering multiple operating modes for precise control of electrical circuits. It features a digital display for easy parameter setting and monitoring.
2. Safety Information
Please read and understand all safety instructions before operating the JZ-801 module. Failure to do so may result in electric shock, fire, or damage to the device.
- Ensure the power supply voltage is within the specified range (6-30V DC or 5V Micro USB).
- Do not exceed the maximum current and voltage ratings of the relay contacts (10A 250VAC, 10A 30VDC, 10A 28VDC).
- Disconnect power before making any wiring connections or adjustments.
- Avoid contact with live terminals when the module is powered.
- This module is intended for use by individuals familiar with basic electronics and electrical safety procedures.
- The module features anti-reverse protection for the power input, but incorrect wiring can still cause damage or malfunction.
3. Product Overview and Components
The JZ-801 module integrates a digital display, control buttons, power input, trigger input, and relay output terminals. Below are illustrations of the module's key components.

Figure 1: JZ-801 Relay Board Top View. This image provides an overall view of the LKHFOAQM JZ-801 relay board, showcasing its compact design with the digital display, relay, and various terminals and buttons.

Figure 2: JZ-801 Relay Board Component Layout. This image displays the top view of the JZ-801 relay board with various components labeled. Key labels include "Input+" and "Input-" for 6.0V-30V power, "Micro USB 5.0V power supply", "Trigger signal 3.0V-24V", "Emergency stop", "Set", "Increase", "Reduce" buttons, and relay output terminals "Normally open No", "Common COM", "Normally closed NC". It also highlights "Anti-reverse protection, reverse polarity does not burn" and lists the four main operating modes: P1, P2, P3, P4.

Figure 3: JZ-801 Relay Board Bottom View. This image shows the underside of the JZ-801 relay board, illustrating the solder points and traces. Labels indicate "GND", "+5V", "6.0~30.0V" for power input, "Trigger", and "GND_T" for trigger input, as well as "NO", "COM", and "NC" for the relay output terminals.
3.1. Key Components:
- Digital Display: 3-digit LED display for showing parameters and timing values.
- Input Terminals (6.0V-30V): Screw terminals for main power input.
- Micro USB 5.0V Power Supply: Alternative power input option.
- Trigger Input (3.0V-24V): Terminal for external trigger signal.
- Relay Output Terminals (NO, COM, NC): Normally Open, Common, and Normally Closed contacts for controlling external loads.
- Control Buttons:
- STOP: Emergency stop or exit setting mode.
- SET: Enter/exit setting mode, switch parameters.
- Increase (+): Increment parameter value.
- Reduce (-): Decrement parameter value.
4. Setup and Wiring
Proper wiring is essential for the safe and correct operation of the JZ-801 module.
4.1. Power Supply Connection
The module can be powered by two methods:
- DC Power Input (6.0V-30V): Connect your DC power source to the "Input+" and "Input-" screw terminals. Ensure correct polarity. The module has anti-reverse protection.
- Micro USB 5.0V: Connect a standard Micro USB cable to the Micro USB port. This is suitable for 5V power applications.
4.2. Trigger Signal Connection
Connect your trigger signal source (3.0V-24V) to the "Trigger" terminal and the ground of your trigger source to "GND_T" or the main power "Input-" terminal.
4.3. Load Connection (Relay Output)
The relay provides a switch for an external load. Identify the appropriate terminals based on your application:
- COM (Common): This is the common terminal of the relay switch.
- NO (Normally Open): The circuit between COM and NO is open when the relay is de-energized and closes when the relay is energized.
- NC (Normally Closed): The circuit between COM and NC is closed when the relay is de-energized and opens when the relay is energized.
Connect your load in series with the COM terminal and either the NO or NC terminal, depending on whether you want the load to be ON or OFF when the relay is inactive.
5. Operating Instructions
The JZ-801 module supports four main operating modes (P1-P4), each with specific timing functions. The digital display shows the current mode and timing parameters.
5.1. Mode Selection
To select an operating mode:
- Power on the module. The display will show the current operating mode (e.g., "P1").
- Press and hold the SET button for approximately 3 seconds until the display flashes, indicating entry into mode selection.
- Use the Increase (+) and Reduce (-) buttons to cycle through the available modes (P1, P2, P3, P4).
- Once the desired mode is displayed, briefly press the SET button to confirm and enter parameter setting for that mode.
5.2. Parameter Setting
After selecting a mode, the display will show the first parameter (e.g., "OP" for ON time, "CL" for OFF time, "LOP" for loop count). The parameters will flash.
- Use the Increase (+) and Reduce (-) buttons to adjust the value of the currently flashing parameter.
- Briefly press the SET button to move to the next parameter.
- Repeat step 1 and 2 until all parameters for the selected mode are set.
- After setting the last parameter, press and hold the SET button for approximately 3 seconds to save the settings and exit the setting mode. The module will return to its normal operating state.
5.3. Timing Unit Selection
In the parameter setting interface, briefly press the STOP button to switch the timing unit:
- XXX. (decimal point in hundreds place): Timing range 0.1 seconds to 99.9 seconds.
- XX.X (decimal point in tens place): Timing range 1 second to 999 seconds.
- X.X.X (no decimal point): Timing range 1 minute to 999 minutes.
5.4. Operating Modes Details
The JZ-801 module offers the following operational modes:
- P1: Trigger Delay OFF.
Upon receiving a trigger signal, the relay turns ON for a set "OP" time, then turns OFF. The trigger signal is ignored during the timing period. (Parameters: OP)
- P2: Trigger Delay ON-OFF.
Upon receiving a trigger signal, the relay remains OFF for a set "CL" time, then turns ON for a set "OP" time, then turns OFF. The trigger signal is ignored during the timing period. (Parameters: CL, OP)
- P3: Trigger Cycle ON-OFF.
Upon receiving a trigger signal, the relay turns ON for "OP" time, then OFF for "CL" time, and repeats this cycle for "LOP" times. If LOP is set to "---", it cycles indefinitely. The trigger signal is ignored during the timing period. (Parameters: OP, CL, LOP)
- P4: Signal Holding Relay ON Function.
If a trigger signal is present, the relay remains ON. When the trigger signal disappears, the relay turns OFF. This acts as a simple signal-controlled switch. (No timing parameters)
5.5. Emergency Stop Function
In any operating mode, briefly press the STOP button to activate or deactivate the emergency stop function. When activated, the display will show "OFF" and the relay will be de-energized. Press STOP again to resume normal operation.
6. Maintenance
The JZ-801 module is designed for reliable operation with minimal maintenance. Follow these guidelines:
- Keep the module clean and free from dust and moisture.
- Avoid exposing the module to extreme temperatures or direct sunlight.
- Regularly check wiring connections for tightness and signs of wear.
- Do not attempt to repair the module yourself. Refer to qualified personnel for service.
7. Troubleshooting
If you encounter issues with your JZ-801 module, refer to the following troubleshooting steps:
- Module does not power on:
- Check power supply connections and ensure voltage is within 6-30V DC or 5V for Micro USB.
- Verify power supply is functioning correctly.
- Ensure correct polarity for DC input.
- Relay does not activate/deactivate:
- Check trigger signal input. Ensure it is within 3.0V-24V and correctly connected.
- Verify the selected operating mode and its parameters are set correctly.
- Ensure the emergency stop function is not active (display shows "OFF").
- Check the load wiring to the relay output terminals (COM, NO, NC).
- Confirm the load itself is functional and not drawing excessive current.
- Parameters cannot be set:
- Ensure you are in the parameter setting interface (display flashing after holding SET).
- Briefly press SET to cycle through parameters.
- Use Increase/Reduce buttons to change values.
- Hold SET to save and exit.
8. Specifications
| Parameter | Value |
|---|---|
| Model | JZ-801 |
| Brand | LKHFOAQM |
| Operating Voltage | DC 6V-30V (via screw terminals) or Micro USB 5V |
| Trigger Signal Voltage | DC 3.0V-24V |
| Relay Contact Rating | 10A 250VAC, 10A 30VDC, 10A 28VDC |
| Timing Range | 0.1 seconds to 999 minutes (adjustable) |
| Display | 3-digit LED |
| Dimensions (L x W x H) | Approximately 0.39 x 0.39 x 0.39 inches (10 x 10 x 10 mm) |
| Item Weight | 1.76 ounces (50 grams) |
9. Warranty and Support
Warranty information for the LKHFOAQM JZ-801 Relay Board is not provided in the product details. Please refer to your point of purchase or the manufacturer's official website for specific warranty terms and conditions.
For technical support or further assistance, please contact the seller or manufacturer directly through the platform where the product was purchased.