Overview

The PSU-UNI2450U power supply is a UL-approved switched-mode DC power supply with high efficiency, exceeding 85% at 187 V AC and over 80% at 93.5 V AC. It accepts a wide range of input voltages to provide 25 V DC at 48 A output or 28 V DC at 43 A output.

Main Features

• Dual Built-in Over-Voltage Protection: Complies with the functional safety requirements of the IEC 61508 standard.
• ON/OFF Switch: The power supply includes an ON/OFF switch combined with isolated AC and DC power connectors, enabling on-line replacement of the unit in a live system.
• Current Limit Feature: Limits the maximum output power to 1200 W.
• Under-Voltage Alarm: Activates at less than 22 V.
• Output Diode: Allows for parallel operation.
• Temperature Range:
  • FC-PSU-UNI2450U: -5°C to 70°C.
  • FA-PSU-UNI2450U: -40°C to 70°C.
• Optimum Protection: Provides protection against continuous overload and short-circuiting.
• Holdup Time: 100 ms.
• FAN Alarm

Specifications

General Information:

• Type Number: FC-PSU-UNI2450U
• Version: V2.1, V3.0
• Approvals: TUV

Power Requirements:

• Voltage: 110-240 V AC (operating limits: 93-253 V AC)
• Power Consumption at No Load: 13 W
• Power Factor: Close to 1
• Input Frequency Range: 47-63 Hz

Physical Specifications:

• Dimensions: 420.5 × 140 × 90 mm (W × H × D) / 16.57 × 5.51 × 3.54 in (W × H × D)
• Weight: 5.7 kg (12.5 lb) – including the cable set

Environmental Conditions:

• Storage Temperature: -25 °C to +85 °C (-13 °F to +185 °F)
• Operating Temperature: -5 °C to +70 °C (23 °F to +158 °F) (Derating of output current as a function of ambient temperature)

Input Specifications:

• Inrush Current: < 15A
• Input Power:
  • < 1400 VA (rated voltage 220-240 V AC)
  • < 1500 VA (rated voltage 110-120 V AC)
• Input Current:
  • < 7.5 A (rated voltage 220-240 V AC)
  • < 16 A (rated voltage 110-120 V AC)

Output Specifications:

• Output Voltage: 25 V DC or 28 V DC; dual overvoltage protection
• Ripple and Noise: < 40 mVpp
• Output Current (25 V DC): 48 A at -5 °C to +50 °C (23 °F to +122 °F)
• Output Current (28 V DC): 43 A at -5 °C to +50 °C (23 °F to +122 °F)
• Derating Output Current: Starting at 50 °C (122 °F): 30 W/°C (Refer to the derating curve for more details)
• Hold-up Time: 100 ms at full load
• Output Voltage Setting: 25 V DC
• Efficiency:
  • 85% (rated voltage 220-240 V AC)
  • 80% (rated voltage 110-120 V AC)

Isolation:

• Input to Output: 3750 Vrms (1 min.)
• Input to Case: 2500 Vrms (1 min.)
• Output to Case: 500 V DC

Connectors:

• AC Input: IEC 60320 C20 inlet type socket, 16 A with retaining clip
• DC Output: 2 x Phoenix PCV6-16/2-G1F-10,163 with locking screws
  • Cable Connector: Phoenix PC 16/2-STF-10,162
    • Min. Wire Size: 0.75 mm²
    • Max. Wire Size: 16 mm²
    • Strip Length: 12 mm
• Alarm Contact: 3 pole Phoenix socket type MC 1,5/3-G-3,81
  • Cable Connector: Phoenix MC 1,5/3-ST-3,81
    • Min. Wire Size: 0.14 mm²
    • Max. Wire Size: 1.5 mm²
    • Strip Length: 7 mm

Alarm Contact Rating: 100 mA / 30 V

Undervoltage Alarm Contact: Relay de-energizes when output voltage drops below 22 V DC.

Voltage Limit: For safety, two independent regulation circuits limit the output voltage to approximately 27 V (30 V for 28 V mode) in case of malfunction of the normal regulation.