Sigma Series-WM

KEY FEATURES

• 48, 24, and 12V Versions
• Low Fan Noise
• Class B Conducted EMI
• DC Good LED
• Universal 85-264VAC Input
• Active Power Factor Correction
• ORing Diode on Output*
• Active Current Sharing*
• Control & Monitoring Features

DESCRIPTION

Unipower Telecom's Sigma Series Wall-Mount rectifiers are designed as a quick and easy solution in providing DC power to a variety of telecom equipment.

The 6 available models range in output power from 450W to 650W. Output voltages of 12V, 24V, and 48V are available for applications without batteries. For battery-supported applications, output voltages are pre-set to 13.6V, 27.2V, or 54.4V.

Green LEDs indicate AC and DC power good. The rectifiers also have control and monitoring features and a +5V standby output. Operating temperature range is -20°C to +70°C.

* Where higher power levels than can be obtained from a single unit are required, it is possible to connect two units in parallel. Alternatively, two units connected in parallel where the total load is less than that available from a single unit will provide N+1 redundant operation.

OUTPUT

• Max. Total Continuous Output Power: 450-650 Watts
• Min. Voltage Adjustment Range: ±5%
• Total Regulation¹: 2.0%
• Total Regulation, Standby Supply: 5.0%
• Ripple & Noise, Pk-Pk²: 1%
• Holdup Time: 10ms
• Dynamic Response³: 300μs
• Temperature Coefficient: ±0.02%/°C
• Minimum Load: 0A
• Overload Protection: Auto Recovery
• Overvoltage Protection: Latched Shutdown
• Remote Sense: Up to 0.25V Per Wire
• Current Share: ±10% Full Load Rating
• Standby Output: +5V, 100mA
• DC Power Good Signal: Logic Low
• AC Power Fail Signal: Logic High
• Inhibit: Logic Low
• Overtemperature Warning: Logic High

INPUT

• Input Voltage Range: 85-264VAC
• Power Factor: 0.99
• Input Frequency: 47-63Hz
• Inrush Current Limiting: 30A Peak
• Harmonic Distortion: EN61000-3-2
• Input Protection: Internal Fuse, 10A

GENERAL

• Efficiency⁴: 85-90% at Full Load
• Switching Frequency
  • PFC Converter: 48-110KHz
  • Output Converter: 275KHz Nominal
• Conducted EMI: EN55022 Curve B, FCC20780 Part 15J Curve B
• Min. Isolation, Class I⁵
  • Input-Output: 3000VAC
  • Input-Ground: 1500VAC
  • Output-Ground: 50VDC
• Input Immunity, Conducted
  • Fast Transients, Line-Line: ±2kV (EN61000-4-4 Level 3)
  • Surges, Line-Line: ±2kV (EN61000-4-5 Level 3)
  • Surges, Line-Ground: ±4kV (EN61000-4-5 Level 4)
• MTBF (Bellcore): 200,000 Hours
• Safety Standards: EN60950, UL60950, CSA22.2-60950

ENVIRONMENTAL

• Operating Temperature: -20°C to 70°C Ambient
• Derating: 2.5%/°C, 50°C to 70°C
• Storage Temperature: -40°C to 85°C
• Cooling: Integral Ball Bearing Fan

PHYSICAL

• Case Material: Aluminum
• Dimensions: 1.6" H x 4.6" W x 14.0" D (40.6mm x 117.0mm x 355.6mm)
• Weight: 2.65 lbs (1.2 kg)

NOTES:

1. No load to full load, including line regulation and load regulation.
2. 20MHz bandwidth. Measure with 0.1μF ceramic and 10μF tantalum capacitors in parallel across the output.
3. <4% deviation recovering to within 1% for 25% load change.
4. Typical efficiency is at low end of range for 12V output and at high end of range for 48V output.
5. Intput-output isolation figure is for isolation components only. 100% production hipot tested.