TDK-Lambada HWS?HWS User Manual Download Page 109

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109

・All specifications are subject to change without notice.

Instruction Manual

HWS

HWS HD

HWS ME

HWS-P

Withstand Voltage

This  series  is  designed  to  withstand  3.0kVAC  between  in-
put  and  output,  2.0kVAC  between  input  and  FG  (chassis),
500VAC  (60V  model  :  651VAC)  between  output  and  FG
(chassis), and 100VAC between output and CNT･PF termi-
nal each for 1 minute. When testing withstand voltage, set
current limit of withstand voltage test equipment at 20mA.
(Output-FG (chassis) : 300mA (60V model : 390mA), Out-
put- CNT･PF : 100mA).
The applied voltage must be gradually increased from zero
to  testing  value  and  then  gradually  decreased  for  shut
down. When timer is used, the power supply may be dam-
aged  by  high  impulse  voltage  at  timer  switch  on  and  oﬀ .
Connect input and output as follows. If output is left open
during test, output voltage might appear momentarily.
This  product  have  monolithic  ceramic  capacitor  in
secondary circuit to frame ground.
Some  of  the  withstand  voltage  tester  may  generate  high
voltage at the matching with monolithic ceramic capacitor
and may cause the unit damage.
So, please check the waveform of test voltage.

Output Voltage External Control (PV)

（A）Control by External Voltage

Output  voltage  external  control  function  is  provided.
Output voltage can be varied by applying an external
voltage  (1−6V)  to  PV   terminal  and  COM   termi-
nal.  Note  if  an  external  voltage  is  not  applied,  there
will be no output. Please consider the following char-
acteristics below when operating the unit.

Note: Only as for the model of 3V output, the output voltage

is used from 30% to 120% at the PV voltage is from

1.5V to 6.0V

Note: Only as for the model of 5-36V output, the output voltage

is used from 20% to 120% at the PV voltage is from 1V

to 6.0 V

Note: Only as for the model of 48V, 60V output, the

output voltage is used from 20% to 110% at the PV

voltage is from 1V to 5.5V

Note: Only as for the model of 48V, 60V output, the

maximum output voltage is used up to 110% at 90%

load current.

(B) Control by External Variable Resistor

PV terminal and COM terminal usage is the same

as explained in section ｢control by external voltage｣ .
But  in  this  method  voltage  for  control  is  supplied
through  REF  terminal.  Variable  resistor  is  connected
between  REF  terminal  and  COM  terminal  and  the
middle  point  of  variable  resistor  is  connected  to  PV
terminal.  Please  use  the  output  voltage  within  20%  -
120% of rated output voltage value (3V model : 30%
-  120 % ,  48V,  60V  model  :  20 %  -  110 % ).  Wires
for  control  lines  must  be  twisted  wire  or  shield  wire.
In  addition,  maximum  variable  voltage  when  control
by  external  variable  resistor  is  rated  output  voltage
(100% ). When output voltage must be externally con-
trol  to  120%  of  rated  output  voltage  (110%  for  48V,
60V model), please follow the following procedure.

(1) PV terminal and REF terminal is short by using

standard connector supplied.

(2) Set the power supply output voltage to maximum

value of the output voltage variable range mentioned
in speciﬁ cation standard by adjusting V.ADJ volume
at the front panel.

(3) Remove standard connector after input is cut oﬀ .
(4) Connect external variable resistor (50kΩ) between

REF terminal and COM terminal. Then connect
middle point of external variable resistor to PV
terminal.(sensing current is 1.4mA)

When  output  voltage  is  over  rated  value,  please  make
sure  that  maximum  output  power  is  below  rated  value.
Moreover,  when  output  voltage  is  below  rated  value,
please  make  sure  that  maximum  output  current  is  below
rated value.
Please consider the following characteristic during usage.

HWS

1500

Load

Power
supply

VR1

REF

COM

Sensing current：1.4mA

Variable resistor 50kΩ

Connection method

PV Voltage (Nominal Input Voltage)

Output