Instruction Manual

1 Terminal Block

AC-DC Power Supplies Open Frame/Enclosed type

LEA-12

lLEA50F

2.1 Input voltage range

n

n

n

n

n

n

n

n

n

n

n

The range is from AC85V to AC264V or DC120V to DC370V.

AC input voltage must have a range from AC85V to AC264V for

normal operation. If the wrong input is applied, the unit will not op-

erate properly and/or may be damaged.

Inrush current limiting is built-in.

If a switch on the input side is installed, it has to be the one han-

dling the input inrush current.

The thermistor is used for protection from inrush current. When

power is turned ON/OFF repeatedly within a short period of time,

it is necessary to have enough time for power supply to cool

down.

Overcurrent protection is built-in and comes into effect at over

105% of the rated current. Overcurrent protection prevents the

unit from short circuit and overcurrent condition. The unit auto-

matically recovers when the fault condition is cleared.

When the output voltage drops more than 50% of the rated output

voltage value at overcurrent, the average output current is re-

duced by intermittent operation of power supply.

The overvoltage protection circuit is built-in and comes into effect

at 115 - 140% of the rated voltage (except 3V output voltage type:

it operates at 4.00 - 5.25V). The AC input should be shut down if

overvoltage protection is in operation. The minimum interval of

AC recycling for recovery is 2 to 3 minutes ( ).

The recovery time varies depending on input voltage.

Adjustment of output voltage is possible by using potentiometer

(only available to 3.3V output voltage type).

Output voltage is increased by turning potentiometer clockwise

and is decreased by turning potentiometer counterclockwise.

Option ”-Y” is recommended which can adjust the output voltatge.

In cases that conform with safety standard, input voltage range is

AC100-AC240V(50/60Hz).

Please avoid applying the over-rated voltage to the output termi-

nal. Power supply may operate incorrectly or fail.In case of oper-

ating a motor etc. , please install an external diode on the output

terminal to protect the unit.

2.2 Inrush current limiting

2.3 Overcurrent protection

2.4 Overvoltage protection

2.5 Output voltage adjustment range

Remarks:

t

t

+Output

-Output

AC(L)

AC(N)

Frame ground

lLEA75F

AC(L)

AC(N)

Frame ground

t

t

+Output

t

t

-Output

lLEA100F

AC(L)

AC(N)

Frame ground

t

t

t

+Output

t

t

t

-Output

lLEA150F

AC(L)

AC(N)

Frame ground

t

t

t

t

t

+Output

-Output

t

t

t

t

t

t

2 Function

CN1

CN2

CN1

CN2

CN1

CN2

CN1

CN3

CN2

LEA