TDK-Lambda ZWS-C Series Instruction Manual page 16

8. EMC and Wiring Method
This power supply is primarily designed and manufactured to be used and enclosed in other equipment.
The installation, wiring, grounding and end application of the switching power supply in the equipment system may influence
its EMC characteristics. Therefore, the EMC performance has to be tested on end system level. Additional filtering may be
required depends on application and installation methods.
Please refer to following application notes which may help to improve EMC performance.
(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 terminal and Frame Ground terminal of equipment firmly.
(5) The recommended wire size :
Input : AWG#22 ~ AWG#16
Output : AWG#20 ~ AWG#16
9. External Fuse Rating
Refer to the following fuse rating when selecting the external input fuse.
Surge current flows when input turn on. Use slow-blow fuse or time-lag fuse. Fast-blow fuse can not be used.
Fuse rating is specified by inrush current value at input turn on.
Do not select the fuse according to actual input current (rms.) values.
ZWS10C : 1.0A
ZWS15C : 1.0A
ZWS30C : 2.5A
10. 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 size is not too thin.
(4) Check if the output current and output power dose not over specification.
(5) Audible noise can be heard when input voltage waveform is not sinusoidal wave.
(6) Audible noise can be heard during Dynamic-Load operation.
(7) Ensure that a large capacitor is not connected on the output side. Please use within maximum capacitance shown below.
MODEL
ZWS10C
ZWS15C
ZWS30C
11. The life expectancy
The life of the power supply depends on the life of the built-in aluminum electrolytic capacitor.
The life is described in reliability data.
The life of the aluminum electrolytic capacitor varies depending on the method of mounting the power supply, the load
current, and the ambient temperature.
Please refer to "Electrolytic Capacitor Lifetime".
Please do not use the product which passed over the life expectancy.
There is a risk of unexpected output shutdown and specifications may not be satisfied.
Please contact us for maintenance or exchange the product which passed over the life expectancy.
Maximum external capacitance
5V 12V
10000uF 2000uF
10000uF 2500uF
10000uF 2700uF
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TDK-Lambda
ZWS10C • 15C • 30C Series
INSTRUCTION MANUAL
15V 24V
1400uF 300uF
1000uF 500uF
1500uF 600uF