OUTPUT CONNECTIONS

MULTI O/P

SINGLE O/P

SIGNALS

1

+5VS

0VS

SRS

2

+5V

0V

ACF

3

+5V

0V

DCF

4

+5V

0V

PM

50V

0V

PS

6

0V

0V

ROF

7

0V

+V

+VS

8

–5V

+V

0V

9

–12V

+V

–

10

+12V

+V

–

11

+24V

+VS

–

12

ROF

ROF

–

INPUT CONNECTIONS

Pin 1

Earth

Pin 2

Neutral

Pin 3

Live

Notes

1

The multiple output LX350 has a continuous output power rating of 350W.

The single-output versions have a continuous output power rating of

385W.

2

Peak power figures for individual outputs on the multiple output unit are

for less than 10 seconds duration. The overall peak power for the unit is

550W for 10 seconds duration.

3

Single output models are adjustable -8%, +16%.

4

A 10% load on the main output is necessary to maintain regulation on the

auxiliaries at full load (multi output model).

5

The input board is fitted with an autorange circuit as standard which

automatically senses the input voltage and switches to the appropriate

voltage range.

6

This product is only for inclusion by professional installers within other

equipment and must not be operated as a stand alone product.

7

Consideration should be given to measuring the temperature on the main

transformer (T1) when the power supply is installed in end-use equipment.

The measured temperature on T1 must not exceed 90

information on the LX350 safety approvals, contact Computer Products.

Options

•

DC input models for 24V and 48V operation are detailed on the LX200,

LX350 and LX550 series DC/DC converter data sheet on page 170.

•

A safety cover and signals board are available as options. To order, add

the suffixes ‘-C’, ‘-S’ respectively , see table below.

SIGNALS (OPTIONAL)

An optional signals board supplies the following VME utility bus signals:

ACF (AC Fail) Logic 1 to 0 transition occurs >10ms before outputs fall

below 80%-85% of nominal in the event of input failure.

DCF (DC Fail) Logic 0 occurs if output falls below <85%–95% of nominal.

SRS (System Reset) Logic 1 for system OK (AC and DC good and reset

times [200ms])

PM

Power Monitor signal, proportional to the output power, ratio of

10mV/W,

±10%.

PS

Power Share connections, to be joined for parallel operation of two

or more units, ensuring equal power share. For power share

operation unit outputs need to be set to ±5% of each other and

should be connected in star configurations with the load as star

centre.

OPTIONS

SUFFIX

EXAMPLE

None

LX350-76xx

Cover

-C

LX350-76xx-C

Signals

-S

LX350-76xx-S

Cover and Signals

-C-S

LX350-76xx-C-S

OVERLOAD/SHORT CIRCUIT PROTECTION

The overload/short circuit protection mechanisms are different for the single

output models and the multiple output model.

The single output models will current limit when the output load reaches

105-120% of maximum load during overload or short circuit conditions.

The unit will operate in a constant current mode making the single output

models suitable for battery charging applications.

The multiple output model uses a power limiting function. When the total

output power reaches 600W the outputs will foldback to the values detailed

below:

Output

Foldback Value

+5V

30A continuous

+12V

8A continuous

+24V

4A continuous

–5V/–12V

Protected by 4A Multi Fuse™

The outputs will not foldback until the total output power exceeds the maxi-

mum power limits. This allows the units to have a peak power capability

but it requires that care must be taken not to permanently overload any

individual output. The +5V, +12V and +24V outputs are not individually pro-

tected and it is recommended that the maximum continuous load does not

exceed the value given in the output specifications. The -5V and -12V out-

puts are individually protected by a 4A Multi Fuse™ and the maximum con-

tinuous load should not exceed the value given in the output specifications.

OUTPUT

OUTPUT CURRENTS

OUTPUT RIPPLE

MODEL NUMBER

VOLTAGE

RMS

PK-PK

+5.0V

50.0A

100.0A

0.2%

2.0%

LX350-7620

–5.0V

4.0A

10.0A

0.2%

2.0%

–12.0V

4.0A

10.0A

0.2%

2.0%

+12.0V

8.0A

20.0A

0.2%

2.0%

+24.0V

4.0A

10.0A

0.2%

2.0%

16.0A

–

0.1%

1.0%

LX350-7624

8.0A

–

0.1%

1.0%

LX350-7617

350 Watt

AC/DC universal input switch mode power supplies

AC/DC POWER SUPPLIES

|

350W AC

PAGE 2

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