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■Condition to meet Isolation & Withstand Voltage standard.
Keep 4mm space from the surfaces and sides of PCB. Especially,
8mm space is necessary from the solder surface.
If the space is not enough, the specification of isolation and
withstand will not be satisfied.
Take the space in the power supply surroundings and the upper area of
components to keep enough for convection cooling.
COMPONENT SIDE
PCB
■
should be connected to the protective earth terminal of the equipment. Also 2 mounting holes are should be connected to
the Chassis (Conductor) by metal spacer. If not, the conducted noise, radiation noise and output noise will increase.
Protective
Wire
Earth
Terminal
6. Wiring Method
(1) The output load line and input line shall be separated each other and twisted individually to improve noise.
(2) Use all lines as thick and short as possible to made lower impedance.
(3) Noise can be reduced by attaching a capacitor to the load terminals.
(4) For safety and EMI considerations, connect between
7. External Fuse Rating
Refer to the following fuse rating when selecting the external fuses that are to be used on input line. Surge current flows when line turns on.
Have to use slow-blow or time-lag type fuse, not fast-blow fuse. Fuse rating is considered by in-rush current value at line turn-on. Do not
select the fuse according to input current (RMS.) values under the actual load condition
ZWS150BP
: 6.3A
ZWS240BP
: 10A
8. Before concluding that the unit is at fault
(1) Check if the rated input voltage is connected.
(2) Check if the wiring of input and output is correct.
(3) Check if the wire thickness is enough.
(4) Check if the output current and output wattage dose not over specification.
(5) Check if the output voltage control (V.ADJ) is properly adjusted. OVP might be triggered and output is shut down.
(6) Audible noise can be heard when input voltage waveform is not sinusoidal wave.
(7) Audible noise can be heard daring Dynamic-Load operation.
More than
4mm
More than 8mm
N
L
Input
Chassis (Conductor)
More than
4mm
More than
4mm
More than
4mm
-
terminal of input connector and protective earth terminal firmly.
-10-
TDK-Lambda
ZWS-BP Series
Instruction Manual
+
Output
Metal spacers
More than
4mm
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