1. Product Overview
The Mean Well RSP-750 series is a 750W single output AC to DC power supply designed for various industrial applications. This series features a wide input voltage range of 90~264VAC and is equipped with Power Factor Correction (PFC) functionality. The RSP-750 models are air-cooled by an internal speed-controlled fan, allowing operation in environments up to 70 degrees Celsius. Key features include adjustable output voltage, remote on/off control, and an auxiliary power supply, providing flexibility for integration into diverse systems.
Figure 1.1: Front view of the Mean Well RSP-750-24 Power Supply, showing the enclosure and terminal connections.
2. Specifications
The following table outlines the general specifications for the RSP-750 series. For detailed model-specific data, refer to the full datasheet.
Figure 2.1: Detailed electrical and environmental specifications for the RSP-750 series, including input/output ratings, protection features, and safety standards.
Key Specifications (RSP-750-24 Model):
- Output Voltage: 24V
- Output Current: 31.3A
- Rated Power: 751.2W
- Input Voltage Range: 90 ~ 264VAC
- Efficiency: Up to 90.5%
- Operating Temperature: -20 ~ +70°C (refer to derating curve)
- Dimensions (L x W x H): 250 x 127 x 41 mm (9.84 x 5 x 1.61 inches)
- Weight: Approximately 1.6 kg (3.54 lbs)
3. Mechanical Installation
The RSP-750 power supply is designed for easy integration. Ensure proper ventilation and observe the specified mounting orientations.
Figure 3.1: Mechanical dimensions, mounting hole locations, and internal air flow direction for the RSP-750 series. Also includes a simplified block diagram of the power supply circuit.
3.1. Terminal Assignment
Refer to Figure 3.1 for the AC input terminal and control pin assignments. Ensure all connections are secure and correctly polarized.
- AC Input Terminal: L (Live), N (Neutral), FG (Frame Ground)
- DC Output Terminal: +V (Positive Output), -V (Negative Output)
- Control Pin (CN50): Various pins for remote functions and auxiliary power.
4. Function Description and Control
The RSP-750 series includes several advanced control features accessible via the CN50 connector.
Figure 4.1: Detailed description of each pin on the CN50 control connector, including functions like positive/negative sensing, output voltage trim, remote ON/OFF, DC OK signal, and auxiliary power.
4.1. Remote ON/OFF Control
The power supply unit (PSU) can be turned ON/OFF remotely using the designated pins on the CN50 connector. This feature allows for system-level power management.
Figure 4.2: Diagrams illustrating the connections for remote ON/OFF control and the DC OK signal output. This includes shorting pins for ON/OFF and monitoring the DC OK signal status.
- To turn PSU ON: Short pin 13 (ON/OFF) and pin 14 (12V-AUX).
- To turn PSU OFF: Open connection between pin 13 (ON/OFF) and pin 14 (12V-AUX).
4.2. DC OK Signal
The DC OK signal indicates the output status of the PSU. It is an open collector signal and can be used to monitor the power supply's operational status.
- Output Status ON: 0 ~ 1V (low voltage)
- Output Status OFF: 3.3 ~ 5.6V (high voltage)
- Maximum sink current is 10mA.
4.3. Output Voltage and Current Trim
The output voltage and current of the RSP-750 can be trimmed within a range of 40% to 110% of its rated value using external voltage signals connected to the CN50 connector.
Figure 4.3: Graphs and diagrams illustrating how to adjust the output voltage and current using external DC voltage sources connected to the PV (pin 5) and PC (pin 7) pins on the CN50 connector, referenced to GND (pin 10, 11).
- Output Voltage Trim: Connect an external DC source (2~5.5VDC) between PV (pin 5) and GND (pin 10, 11).
- Output Current Trim: Connect an external DC source (2~5.5VDC) between PC (pin 7) and GND (pin 10, 11).
5. Safety and Protection
The RSP-750 series incorporates multiple protection mechanisms to ensure safe and reliable operation.
- Overload Protection: Constant current limiting, recovers automatically after fault condition is removed.
- Over Voltage Protection: Shut down O/P voltage, re-power on to recover.
- Over Temperature Protection: Shut down O/P voltage, recovers automatically after temperature goes down.
- Short Circuit Protection: The unit is protected against short circuits.
6. Maintenance and Troubleshooting
6.1. Maintenance
The RSP-750 power supply is designed for long-term reliability with minimal maintenance. Regular checks include:
- Ensure proper airflow around the unit and keep ventilation openings clear of obstructions.
- Periodically inspect wiring for any signs of damage or loose connections.
- Keep the unit clean and free from dust accumulation, especially around the fan and vents.
6.2. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No output voltage | No input power; Overload protection activated; Over voltage protection activated; Remote ON/OFF engaged. | Check AC input connections; Reduce load; Re-power unit; Check remote ON/OFF connections (short pin 13 and 14). |
| Output voltage fluctuates | Unstable input voltage; Load fluctuations; Remote sense not properly connected. | Ensure stable AC input; Verify load stability; Check remote sense connections (+S, -S). |
| Unit overheating | Insufficient ventilation; Excessive ambient temperature; Overload. | Ensure clear airflow; Operate within specified temperature range; Reduce load. |
7. Warranty and Support
The Mean Well RSP-750 series power supply typically comes with a 3-year manufacturer's warranty. Please refer to your purchase documentation for specific warranty terms and conditions.
For technical support, product inquiries, or warranty claims, please contact your authorized Mean Well distributor or the seller from whom you purchased the product. Provide your model number (RSP-750-24) and serial number when seeking support.
Manufacturer: MEAN WELL
Model: RSP-750-24
