Cloudray MYJG-50W 220V
Cloudray 50W Laser Power Supply User Manual
Model: MYJG-50W 220V
1. Introduction
This user manual provides essential information for the safe and efficient operation, setup, and maintenance of your Cloudray 50W Laser Power Supply (Model: MYJG-50W 220V). Please read this manual thoroughly before installation and use to ensure optimal performance and longevity of the product.
2. Product Overview
The Cloudray 50W Laser Power Supply is designed for CO2 laser tubes, offering stable and reliable power for laser engraving and cutting machines. It features advanced control and protection mechanisms to ensure safe and precise operation.

Figure 2.1: Cloudray 50W Laser Power Supply (Front View)
Key Features:
- Versatile Compatibility: Compatible with 45W-50W CO2 laser tubes from various manufacturers.
- Quick Response Speed: Ensures efficient and precise laser operation.
- Effortless Control and Protection: Features TTL level start/stop functionality, output open circuit protection, TTL signal indication, water through signal indication, and laser output indication.
- Manual Test Function: Includes a button to manually check the output laser.
- External Ammeter with LCD: Allows real-time monitoring of processing current and status, with a trimmer potentiometer for precise current adjustments.
- High Efficiency: Designed for optimal power delivery and prolonged laser tube service life.

Figure 2.2: Overview of key features including simple control, laser power adjustment, and protection.
Component Identification:

Figure 2.3: Detailed view showing the product label, input/output ports, external ammeter connection, and cooling fan.
- Product Label: Contains model number, AC input, DC output, and manufacturer information.
- Input/Output Ports: Connectors for power input, control signals, and laser output.
- External Ammeter: Connects to monitor current output and status.
- Cooling Fan: Provides forced air cooling for heat dissipation.
3. Specifications

Figure 3.1: Detailed specifications table for the laser power supply.
| Category | Parameter | Value |
|---|---|---|
| Input | Input Voltage | AC230V |
| AC Frequency | 47 ~ 440Hz | |
| Output | Max Output Voltage | 22kV |
| Max Output Current | 22mA | |
| Size | L x W x H (mm) | 171*161*91 |
| Weight | (kg) | 1.5 |
| Efficiency | 91% | |
| MTBF | ≥ 30000 hours | |
| Response Speed | ≤ 1ms | |
| Voltage Range | High-Level | ≥ 3V |
| Low-Level | ≤ 0.7V | |
| Environment | -30° ~ +65° | |
| Cooling | Forced air cooling (fan cooling) | |
| High Temperature Test | Full Load / 60°C / 12 hours | |
| Start / Stop Test | 500 times 7 seconds |
Note: Dimensions are L x W x H in millimeters. Weight is in kilograms.
4. Setup and Installation
Proper installation is crucial for the safe and effective operation of your laser power supply. Always ensure the power supply is disconnected from the main power source before performing any wiring or installation procedures.
4.1 Wiring Diagram
Refer to the following diagram for correct wiring connections. Ensure all connections are secure and properly insulated.

Figure 4.1: Main wiring diagram showing input power, control signals, and laser output connections.
- AC Input (L, N, FG): Connect your 220V AC power source to these terminals. FG is for Frame Ground.
- High Voltage Output (LASER): Connect the high voltage output to your CO2 laser tube. This connection carries high voltage and must be handled with extreme caution.
- Control Signals (H, L, P, G, IN, 5V): These terminals are for connecting to your laser controller board.
- H (Switch Laser Control Active High): For laser control via high-level signal.
- L (Switch Laser Control Active Low): For laser control via low-level signal.
- P (Water Protection): Connect to your water protection sensor. The laser will not fire if water flow is not detected.
- G (Signal Ground): Common ground for control signals.
- IN (Input Control Signal 0-5V): For analog power control (0-5V).
- 5V (Output Power 5V): Provides 5V output for external devices.
- For Laser Signal Input: Typically an RJ45 port for specific controller connections.
4.2 External Ammeter Connection
The power supply supports an external ammeter for real-time current monitoring. Connect the ammeter as shown below.

Figure 4.2: Connection of the external ammeter to the power supply's dedicated port.
The external ammeter provides a digital display for current output and status indicators for water protection and laser signal. The trimmer potentiometer on the ammeter allows for fine-tuning of the current.

Figure 4.3: Ammeter display showing current output and status indicators (Water protection, Laser signal).
5. Operating Instructions
5.1 Powering On/Off
- Ensure all connections are correct and secure before applying power.
- Turn on the main power switch to the laser machine. The power supply will initialize.
- To power off, turn off the main power switch.
5.2 Laser Test Function
The power supply includes a "TEST" button for manually checking the laser output. This is useful for troubleshooting or initial setup.
- Locate the red "TEST" button on the power supply unit.
- Press and hold the button to activate the laser output. The laser will fire at a low power setting.
- Release the button to stop the laser output.
- Caution: Never look directly into the laser beam. Always wear appropriate laser safety glasses when performing this test.
5.3 Current Adjustment
The laser output current can be adjusted using the trimmer potentiometer on the external ammeter. Rotate the knob to increase or decrease the current as needed for your application. Monitor the current display on the ammeter during adjustment.
5.4 Safety Features
- TTL Level Start/Stop: Allows for precise control of laser firing via digital signals from your controller.
- Output Open Circuit Protection: Protects the power supply from damage if the laser tube connection is interrupted.
- Water Through Signal Indication: The power supply will not allow the laser to fire if the water cooling system is not functioning correctly, indicated by the water protection status on the ammeter.
- Laser Output Indication: Provides visual feedback when the laser is actively firing.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Cloudray Laser Power Supply.
- Keep Clean: Periodically clean the exterior of the power supply, especially the fan vents, to ensure proper airflow and prevent overheating. Use a soft, dry cloth.
- Check Connections: Regularly inspect all wiring connections (AC input, laser output, control signals) to ensure they are tight and free from corrosion or damage.
- Environmental Conditions: Ensure the power supply operates within the specified environmental temperature range (-30°C to +65°C) and humidity levels.
- Fan Operation: Verify that the cooling fan is operating freely and quietly. A noisy or non-functioning fan may indicate a problem.
7. Troubleshooting
This section provides solutions to common issues you might encounter with your laser power supply. For problems not listed here, please contact Cloudray customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No laser output |
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| Ammeter shows 0mA or incorrect reading |
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| Overheating |
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8. Warranty and Support
Cloudray products are manufactured to high quality standards. For warranty information, please refer to the warranty card included with your product or visit the official Cloudray website. If you encounter any issues or require technical assistance, please contact Cloudray customer support through the vendor's contact information provided at the point of purchase or via their official channels.
For more information and resources, visit the Cloudray Store on Amazon.
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