MEAN WELL RSP-750-24 Single Output Power Supply

1. Pengenalan

This manual provides essential information for the safe and efficient installation, operation, and maintenance of the MEAN WELL RSP-750-24 Single Output Power Supply. The RSP-750-24 is a 751.2W power supply providing a 24V output at 31.3A, featuring a Power Factor Correction (PFC) function. Please read this manual thoroughly before using the product.

2. Arahan Keselamatan

AMARAN: Risiko renjatan elektrik. Pemasangan dan servis hanya boleh dilakukan oleh kakitangan yang berkelayakan.

• Ensure the power supply is disconnected from the AC mains before any installation, wiring, or maintenance procedures.
• Sahkan bahawa input voltage range matches the specifications of the power supply.
• Do not operate the unit in environments with excessive moisture, dust, or extreme temperatures outside the specified range.
• Ensure proper ventilation to prevent overheating. The unit relies on air cooling.
• Connect the protective earth (FG) terminal to ground to prevent electric shock.
• Jangan buka bekalan kuasa casing. Tiada bahagian yang boleh diservis pengguna di dalamnya.

3. Ciri-ciri

• Universal AC input / Full range (85~264VAC).
• Built-in active PFC function, PF>0.97.
• High efficiency, up to 92%.
• Perlindungan: Litar pintas / Lebihan / Lebih voltage / Suhu berlebihan.
• Keluaran voltage can be trimmed between 40 ~ 110% by 2 ~ 5.5VDC external control signal.
• Output current can be trimmed between 40 ~ 110% by 2 ~ 5.5VDC external control signal.
• Forced air cooling by built-in DC fan with speed control function.
• Built-in remote ON-OFF control.
• Built-in remote sense function.

4. Produk Lebihview

The MEAN WELL RSP-750-24 power supply is designed for industrial and scientific applications, providing stable and reliable DC power.

Rajah 4.1: Depan view of the RSP-750-24 power supply, showing the main casing dan gril kipas.

Rajah 4.2: Sisi view illustrating the input and output terminals, along with control connectors.

Figure 4.3: Product label showing model number, electrical ratings, and general dimensions.

5. Pemasangan dan Persediaan

5.1 Pemasangan Mekanikal

The RSP-750-24 unit measures 9.84 x 5 x 1.61 inches (250 x 127 x 41 mm) and weighs 3.61 pounds. Ensure adequate space for air circulation, especially around the fan intake and exhaust. Mount the unit securely using appropriate fasteners. Refer to the mechanical drawing for detailed mounting hole positions.

Figure 5.1: Mechanical specifications and terminal layout. Note the air flow direction for proper cooling.

5.2 AC Input Connection (TB1)

Connect the AC mains power to the input terminal block (TB1) as follows:

• Pin 1: AC/L (Live)
• Pin 2: AC/N (Neutral)
• Pin 3: FG (Frame Ground)

Ensure all connections are tight and use appropriate wire gauges for the current rating. The unit accepts a universal AC input range of 85~264VAC.

5.3 DC Output Connection

Connect the load to the DC output terminals. The RSP-750-24 provides a 24V DC output. Observe correct polarity (+V and -V). Use appropriate cabling for the 31.3A output current.

5.4 Control Pin CN50 Connection

The CN50 connector provides various control and monitoring functions. Refer to the pin assignment table below and the detailed function descriptions for proper connection.

Figure 5.2: Detailed function description for each pin on the CN50 control connector, including a basic wiring diagram for the shorting connector.

CN50 Pin Assignment:

5.5 Remote ON/OFF Function

The PSU can be turned ON/OFF by using the "Remote ON/OFF" function via CN50 pins 13 (ON/OFF) and 14 (12V-AUX).

• SW close (Short): PSU HIDUP
• SW open (Open): PSU DIMATIKAN

Figure 5.3: Wiring diagrams for Remote ON/OFF control and DC_OK signal monitoring.

5.6 Fungsi Deria Jauh

The remote sensing function compensates for voltage drop across the load wiring, ensuring accurate voltage at the load terminals. Connect +S (pin 1) to the positive load terminal and -S (pin 3) to the negative load terminal. Ensure sense lines are twisted in pairs to minimize noise pickup.

5.7 Keluaran Voltage Potong

Keluaran voltage of the RSP-750-24 can be trimmed between 40% and 110% of its rated value (24V) using an external DC source (2-5.5VDC) connected between PV (pin 5) and GND (pin 10, 11) on CN50.

Figure 5.4: Diagrams illustrating the connections and characteristics for Output Voltage TRIM and Output Current TRIM functions.

5.8 Output Current Trim

The output current of the RSP-750-24 can be trimmed between 40% and 110% of its rated value (31.3A) using an external DC source (2-5.5VDC) connected between PC (pin 7) and GND (pin 10, 11) on CN50.

6. Operasi

6.1 Menghidupkan/Mematikan

Once all connections are secure and verified, apply AC input power. The unit will power on, and the fan will activate. To turn off the unit, remove AC input power or use the Remote ON/OFF function if configured.

6.2 DC_OK Signal Monitoring

The DC_OK signal (CN50 pin 9) is an open collector signal that indicates the output status of the PSU. It is low when the PSU output is within specification (ON) and high impedance when the PSU is off or in fault condition. This signal can be used for external monitoring or control systems.

• 0 ~ 1V: PSU HIDUP
• 3.3 ~ 5.6V: PSU DIMATIKAN

7. Penyelenggaraan

The RSP-750-24 power supply is designed for long-term reliability and requires minimal maintenance. However, regular checks can extend its lifespan and ensure optimal performance.

• Pembersihan: Periodically inspect the fan and ventilation openings for dust accumulation. Clean with compressed air or a soft brush to ensure unobstructed airflow.
• Pengudaraan: Ensure the operating environment maintains adequate air circulation around the unit. Avoid blocking the fan or air vents.
• Sambungan: Periodically check all input, output, and control wiring connections for tightness and signs of wear or corrosion.

8. Penyelesaian masalah

If the power supply is not functioning as expected, perform the following basic checks:

• Tiada Keluaran Voltage:
  • Verify AC input power is present and within the specified range (85-264VAC).
  • Check all input and output wiring for correct connections and tightness.
  • If using the Remote ON/OFF function, ensure it is configured correctly to turn the unit ON.
  • Check for any short circuits or overloads on the output. Disconnect the load and test the power supply independently.
• Keluaran Voltage Turun naik:
  • Ensure the load is stable and not drawing intermittent current spikes.
  • If Remote Sense is used, verify the connections are correct and secure.
  • Check for proper ventilation; overheating can cause instability.
• Terlalu panas:
  • Ensure the fan is operating and not obstructed.
  • Verify ambient temperature is within the specified operating range (-25°C to +70°C).
  • Ensure the load is not exceeding the power supply's rated output. Refer to the derating curve in the specifications section.

If issues persist after performing these checks, contact MEAN WELL technical support or your distributor for further assistance.