1. Introduction
The DS18 PWS100A is a 100-AMP Switching DC Power Supply designed to convert standard 110-130V AC household power into an adjustable 10-16V DC power. It provides up to 100 amps of continuous power, making it suitable for various applications such as powering car audio displays, show cars, and test benches. This manual provides essential information for the safe and efficient operation of your PWS100A power supply.
Figure 1.1: Front view of the DS18 PWS100A Power Supply.
2. Safety Information
WARNING: Risk of Electric Shock. Do not open the unit. Refer all servicing to qualified personnel.
- Ensure the power supply is connected to an AC power source that provides the correct voltage (110-130V AC). Incorrect voltage can damage the unit and pose a safety hazard.
- Do not expose the unit to moisture or extreme temperatures.
- Ensure adequate ventilation around the unit. Do not block cooling fan vents.
- Always disconnect the power supply from the AC outlet before making any connections or adjustments to the DC output.
- Use appropriate gauge wiring for DC output connections to handle up to 100 amps.
- This unit is designed for indoor use only.
3. Features
The DS18 PWS100A power supply incorporates several features for reliable and efficient operation:
- Input Voltage: 120V AC +/-10%
- Output Current: 100 Amps DC Continuous (Maximum)
- Adjustable Regulated Output Voltage: 10-16V DC
- Output Ripple: 150mV RMS
- Power Switch: 20A/250V AC rated
- Thermal and Current Overload Shut-Off Protection
- Four Cooling Fans for efficient heat dissipation
- Pulse Charging feature to inhibit battery sulfation (when used with batteries)
- Integrated Voltmeter for output voltage monitoring
Figure 3.1: Key features of the PWS100A.
4. Setup
Follow these steps to set up your DS18 PWS100A power supply:
- Unpacking: Carefully remove the power supply from its packaging. Inspect for any signs of damage.
- Placement: Place the unit on a stable, flat surface in a well-ventilated area. Ensure that the front and rear cooling fan vents are not obstructed.
- AC Power Connection: Locate the AC input port on the rear panel. Ensure the power switch is in the OFF position. Connect the provided AC power cord to the unit and then to a standard 110-130V AC wall outlet.
- DC Output Connection: Connect your DC equipment to the high current power and ground terminals on the rear panel. Ensure proper polarity (Positive to Positive, Negative to Negative). Use heavy-gauge wire suitable for the expected current draw (up to 100 amps). Tighten connections securely.
- Voltmeter Connection (Optional): If using the external voltmeter, connect it to the designated voltmeter output terminals.
Figure 4.1: Rear panel with AC input and power switch.
Figure 4.2: Rear panel with DC output terminals and voltage adjustment.
5. Operation
To operate the DS18 PWS100A power supply:
- Power On: Once all connections are secure, flip the AC power switch on the rear panel to the ON position. The 'POWER' indicator light should illuminate.
- Adjusting Output Voltage: Use the 'VOLTAGE' adjustment knob on the rear panel to set the desired DC output voltage between 10V and 16V. Monitor the integrated voltmeter or external voltmeter to ensure the correct voltage is set for your equipment.
- Monitoring: The integrated voltmeter provides a real-time display of the output voltage. The 'PROTECT' indicator light will illuminate if the unit enters protection mode due to overload or overheating.
- Power Off: To turn off the unit, first disconnect the DC load if possible, then flip the AC power switch to the OFF position.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your PWS100A power supply:
- Cleaning: Periodically clean the exterior of the unit with a soft, dry cloth. Do not use liquid cleaners or solvents.
- Ventilation: Regularly check that the cooling fan vents on the front and rear panels are free from dust and obstructions. Blocked vents can lead to overheating and reduced performance.
- Connections: Ensure all AC and DC connections remain tight and free from corrosion. Loose connections can cause arcing and power loss.
- Storage: When not in use for extended periods, store the power supply in a cool, dry place, away from direct sunlight and moisture.
7. Troubleshooting
If you encounter issues with your DS18 PWS100A, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power / Unit does not turn on | AC power cord not connected; Power switch off; No power from AC outlet. | Check AC power cord connection; Ensure power switch is ON; Test AC outlet with another device. |
| No DC output / Low output voltage | DC output connections loose or incorrect polarity; Voltage adjustment knob set too low; Unit in protection mode. | Verify DC connections and polarity; Adjust voltage knob; Check for overload or overheating (see 'PROTECT' indicator). |
| 'PROTECT' indicator is lit | Overload condition (too much current drawn); Overheating. | Reduce the load on the power supply; Ensure adequate ventilation and clear fan vents; Allow unit to cool down. |
| Cooling fans not operating | Unit not under sufficient load to activate fans; Fan malfunction. | Fans typically activate under load or when internal temperature rises. If fans never operate under load and unit overheats, contact support. |
8. Specifications
Detailed technical specifications for the DS18 PWS100A:
- Brand: DS18
- Model Number: PWS100A
- Input Voltage: 120V AC +/-10%
- Output Current: 100 Amps DC Continuous (Maximum)
- Output Voltage: Adjustable Regulated 10-16V DC
- Output Ripple: 150mV RMS
- Input Frequency: 60Hz
- Power Switch Rating: 20A/250V AC
- Protection: Thermal and Current Overload Shut-Off
- Cooling: 4 Cooling Fans
- Dimensions (L x W x H): Approximately 262.4mm (10.33 inches) x 240mm (9.44 inches) x 67mm (2.64 inches)
- Weight: Approximately 3.63 kg
- Voltmeter: Included
Figure 8.1: Rear panel overview with key specifications.
Figure 8.2: Product dimensions and input specifications.
9. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or visit the official DS18 website. DS18 products typically come with a limited warranty covering manufacturing defects.
If you require technical support or have questions not covered in this manual, please contact DS18 customer service through their official website or your authorized dealer. When contacting support, please have your product model number (PWS100A) and purchase details ready.