Cosel PAA50F Instruction Manual page 4

2 Function
2.1 Input voltage range
n
The range is from AC85V to AC264V.
n
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.
n
In cases that conform with safety standard, input voltage range is
AC100-AC240V(50/60Hz).
2.2 Inrush current limiting
n
Inrush current limiting is built-in.
n
If a switch on the input side is installed, it has to be the one han-
dling the input inrush current.
l
PAA100F PAA150F
n
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.
l
PAA300F PAA600F
n
The thyristor technique 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 between power ON and
OFF to operate resistance circuit for inrush current.
2.3 Overcurrent protection
n
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 of less than 20
sec. The unit automatically recovers when the fault condition is
cleared.
l
PAA300F PAA600F
n
If the output voltage drops more than 50% of the rated voltage in
an overcurrent protection mode, the average current will also be
reduced by the intermittent operation.
2.4 Overvoltage protection
n
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 4.0 - 5.25V). The AC input should be shut down if
overvoltage protection is in operation. The minimum interval of
AC recycling for recovery is 1 1/2 minutes to 3 1/2 minutes.
The recovery time varies depending on input voltage.
AC-DC Power Supplies Enclosed type
June 29, 2011
Instruction Manual
Remarks:
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.
2.5 Output voltage adjustment range
n
Adjustment of output voltage is possible by using potentiometer.
n
Output voltage is increased by turning potentiometer clockwise
and is decreased by turning potentiometer counterclockwise.
2.6 Remote ON/OFF
l
PAA300F PAA600F
n
Remote ON/OFF circuit (RC, RG) is isolated from input, output
and FG.
Between RC and RG: Output voltage is ON at Low" level or short
circuit (0 - 0.8V).
Between RC and RG: Output voltage is OFF at High" level or
open circuit (2.7 - 5.0V).
Connection example:
When RC terminal is Low" level, fan out current is 3mA typ. "
When Vcc is applie d, use 5V
function is not used, please short between RC and RG terminals.
l
PAA50F PAA75F PAA100F PAA150F
(Optional -R") "
n
Option "-R" is available for remote ON/OFF.
Between RC(+) and RC(-)
SW ON
(4.5 - 12.5V)
SW OFF
(0 - 0.5V)
"
"
Vcc 12V. When remote ON/OFF
Output
ON
OFF
PAA-17
PAA