Instruction Manual

AC-DC Power Supplies Open Frame/Enclosed type

2.6 Isolation

nFor a receiving inspection, such as Hi-Pot test, gradually increase

(decrease) the voltage for the start (shut down). Avoid using Hi-

Pot tester with the timer because it may generate voltage a few

times higher than the applied voltage, at ON/OFF of a timer.

If the unit is tested on the isolation between input & output and

output & FG, remote ON/OFF must be shorted to output.

2.7 Remote ON/OFF (Optional ”-R”)

nOption -R is available for remote ON/OFF.

””

LEA-13

Between RC(+) and RC(-)

Output

SW ON

(4.5 - 12.5V)

SW OFF

(0 - 0.5V)

ON

OFF

Connector for remote ON/OFF (Optional)

2

1

External Power

Source

RC(-)

RC(+)

SW

l=20mA max

Vcc

RRi

nWhen external power source is in the range of 4.5 - 12.5V, current

limit resistance R is not required. However, when external power

source exceeds 12.5V, current limit resistance R must be con-

nected.

To calculate the current limit resistance use following equation:

Where;

Vcc = External Power Source

Ri

= The internal resistance (780 )

n

n

A wrong connection may damage the internal components of the

unit.

Remote ON/OFF circuit (RC(+), RC(-)) is isolated from input, out-

put and FG.

Vcc - (1.1+Ri

0.005)

0.005

R[ ]=

3 Series Operation and

Parallel Operation

nSeries operation is available by connecting the outputs of two or

more power supplies with the same output voltage, as shown be-

low. Output current in series connection should be lower than the

lowest rated current in each unit.

(a)

Power

Supply

+

-

Power

Supply

+

-

(b)

Power

Supply

+

-

Power

Supply

+

-

n

n

Parallel operation is not possible.

Redundancy operation is available by wiring as shown below.

Power

Supply

+

-

Power

Supply

+

-

nEven a slight difference in output voltage can affect the balance

between the values of I and I .

Please make sure that the value of I does not exceed the rated

current of a power supply.

I

the rated current value

12

3

3

LEA