OUTPUT SPECIFICATIONS

Voltage adjustability

+5V output

±5.0%

Auxiliaries

±3.0%

Line regulation

LL to HL, FL

Main output

±0.1% max.

Total regulation

See Note 4

±1.0%

Overshoot/undershoot

At turn-on

0%

Transient response

+5.1V

150mV max. dev.

(35A to 50A step)

500µs recovery

Temperature coefficient All outputs

±0.02%/°C

Overvoltage protection

+5V output, note 7

6.25V ±0.5V

Output power limit

550W, min.

Short circuit protection

Foldback

Continuous

See Note 7

automatic recovery

Remote sense

Main output

Compensate

up to 200mV

Fan output current

Note C

12V/0.75A

INPUT SPECIFICATIONS

Input voltage range

Autoranging

90 to 132VAC

180 to 264VAC

Input frequency range

47Hz to 63Hz

Input surge current

110/230VAC

40A

Safety ground

110VAC, 60Hz

0.6mA, max.

leakage current

230VAC, 50Hz

1.6mA, max.

NFS350 SERIES

Triple and quad output

[ 2 YEAR WARRANTY ]

• Autoranging input

• Overvoltage protection on main output

• Short circuit protection with auto restart

• Power fail detect

• VDE, UL, CSA and BABT approved

• Floating, fully adjustable fourth output

• 12VDC fan connection

• Conducted noise to EN55022-A, FCC level B

The NFS350 Series of triple and quad output 350 Watt open frame switchers is

designed for use with larger digital systems. High power density allows a very

compact system design. The advanced topology yields very well regulated outputs

that eliminate the need for inefficient dissipative regulators. The unique floating fourth

output allows a user configurable output voltage, adjustable from 4.5V to 30V, either

positive or negative, at up to 4A. These supplies are approved to UL, CSA, VDE and

BABT and their built-in line filter reduces conducted noise below FCC level B and VDE

0871 level A. NFS350 Series power supplies are suitable for a wide range of general

industrial applications, including process automation, robotics, networking, lighting

systems and telecoms. They are particularly suited for shelf power in miniature rack

systems or subracks.

PAGE 1

ELECTROMAGNETIC COMPATIBILITY SPECIFICATIONS

Conducted emissions

EN55022, level A

Radiated emissions

EN55022

ESD air

EN61000-4-2, level 3

Perf. criteria 1

ESD contact

EN61000-4-2, level 4

Perf. criteria 1

Surge

EN61000-4-5, level 3

Perf. criteria 1

Fast transients

EN61000-4-4, level 3

Perf. criteria 1

Radiated immunity

EN61000-4-3, level 3

Perf. criteria 1

Conducted immunity

EN61000-4-6, level 3

Perf. criteria 1

GENERAL SPECIFICATIONS

Hold-up time

230VAC, after power failure

20ms

230VAC, after PFD flag

5ms

Efficiency

230VAC, FL

70% typical

Isolation voltage

Input/output

3000VAC

Input/chassis

1500VAC

Switching frequency

Variable

Approvals and

Safety

VDE0805, EN60950, IEC950

standards

IEC1010, UL1950, BABT

CSA C22.2 No. 950

Weight

1.9kg (67.07oz)

MTBF

MIL-HDBK-217E

66,000 hours

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating, see curve

0°C to +70°C

Non-operating

–40°C to +85°C

0°C to 50°C,

350W

30CFM forced air

50°C to 70°C,

Derate 8.75W/°C

30CFM forced air

Thermal switch

+85°C typical

trip temperature, Note 7

Peak power (60s)

450W

Relative humidity

Non-condensing

5% to 95% RH

Altitude

Operating

10,000 feet max.

Non-operating

40,000 feet max.

Vibration, 5Hz to 500Hz Three orthogonal axes

2.4G rms

random vibration,

10 min. test for each axis