SSI

ERP2U Power Supply Design Guide, V2.31

The power supply shall operate within all specified limits over the Top temperature range. All airflow shall pass through the power supply and not over the exterior surfaces of the power supply.

Table 2: Thermal Requirements

ITEM

DESCRIPTION

MIN

MAX

UNITS

Top

Operating temperature range.

0

50

°C

 

 

 

 

 

Tnon-op

Non-operating temperature range.

-40

70

°C

 

 

 

 

 

The power supply must meet UL enclosure requirements for temperature rise limits. All sides of the power supply with exception of the air exhaust side, must be classified as “Handle, knobs, grips, etc. held for short periods of time only”.

5AC Input Requirements

STATUS

Required

The power supply modules shall incorporate universal power input with active power factor correction, which shall reduce line harmonics in accordance with the EN61000-3-2 and JEIDA MITI standards.

5.1AC Inlet Connector

STATUS

Required

The AC input connector shall be an IEC 320 C-14power inlet. This inlet is rated for 15 A/250 VAC. This connector may be located on the module or on the cage.

5.2Redundant AC Inlets

STATUS

Recommended

The power supply assembly may have dual redundant AC inlets. The power supply shall be able to operate over its full, specified range of requirements with either or both AC input powered. If there is a loss of one AC inlet the power supplies shall continue to operate with no interruption of performance. It is required that all redundant power supply modules be present to support redundant AC inlets.

5.3AC Input Voltage Specification

STATUS

Required

The power supply must operate within all specified limits over the following input voltage range. Harmonic distortion of up to 10% THD must not cause the power supply to go out of specified limits. The power supply shall operate properly at 85 VAC input voltage to guarantee proper design margins.

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SSI America ERP2U manual AC Input Requirements, AC Inlet Connector, Redundant AC Inlets, AC Input Voltage Specification

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