cdtechno NX350-U4D, NX350-U4E, NX350-U4F, NX350-U4H, NX350-U3A Datasheet

Product Data Sheet

350 WATT

AC/DC POWER SUPPLY

NX350

DESCRIPTION

The NX350 is a compact 350 watt Power Factor Corrected, multiple
output power supply. All outputs are fully isolated and regulated.
Active current sharing circuitry, together with control functions
and alarm options, simplifies N+1 and redundant applications.
Fan and disk drive applications are handled by the peak current
ratings of the auxiliary outputs.

FEATURES

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! Active Power Factor Correction

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! Fully Isolated Outputs

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! Low Profile: 9” x 4.85” x 2.00”

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! One, Two, Three and Four Output Models

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! N+1 Current Sharing

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! FCC/VDE Class B EMI Filter Standard

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! Optional Fan Mounted On Cover

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Internet: http://www.cdpowerelectronics.com

Power Electronics Division, United States

3400 E Britannia Drive, Tucson, Arizona 85706

Phone: [phone] Fax: [phone]

NX350 3/98 REV B Page 1

AGENCY APPROVALS

Power Electronics Division, Europe

C&D Technologies (Power Electronics) Ltd.

132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland

Tel: [phone] Fax:[phone]

Input Specifications

Parameter Conditions Min Typ Max Units

Operating Range 47-63 Hz 90 264 VAC

Inrush Current Limiting

120VAC, cold start 37 APK

240VAC cold start 70 APK

Efficiency

120V, full load 70 %
240V, full load 75 %

Power Factor Correction (PFC) 0.99

Meets IEC 1000-4-7/EN61000-3-2 (formerly IEC 555-2)

Remote Sense

Remote Sense is provided on Output #1 and will
compensate for 0.7V of line drop. Remote Sense leads are

protected against open, short and reversal.

Remote On/Of

The power supply is turned on with a TTL logic ‘1’ (or open)
signal and turned off by a switch closure or TTL logic ‘0’
referenced to (-) sense terminal. Consult the factory for other
options.

Over Voltag e Protection

Output #1: 6.5V ± 0.5 VDC.
The power supply will latch off until AC power is cycled.

Over Current Protection

Individual current limit on all outputs. Automatic recovery
upon fault removal.

Transient Response

The peak output voltage excursion will not exceed 2% and
will recover within 1% in 200 µsec for a 25% load step
change.

Output Isolation

All outputs are fully isolated.

Power Fail Signal

Upon AC input voltage removal, the power fail signal drops
to logic zero at least 5msec before loss of DC output. On
AC input turn-on, signal remains low until outputs are in
regulation. Consult the factory for other options.

N+1 Load Share

Output #1 has active load sharing circuitry. Units will load
share within 1.5% of Maximum Rated Load.

Over Temperature Protection

Thermal switch turns off power supply if overheating occurs
and automatically restarts.

Safety

UL Recognized: UL File Number E14675 (1950 & 1012)
CSA Certified: CSA File Number LR 9070-154C

(C22.2 No. 234-M90, Level 6)

TUV License Number: R9576031 (EN60950) (IEC950)

Cooling

The unit is designed to operate with 30 CFM of airflow.

NX350 3/98 REV BPage 2