INSTRUCTION MANUAL
CUS100MB
TDK-Lambda
<Page>
13/14
Condition to meet EMI, EMC, Isolation, Withstand Voltage and Cooling.
(1) This series is convection cooling type. In consideration of the heat radiation and safety, please keep a distance of more
than 15mm between the power supply and the peripheral parts. When lining up multiple units, please make sure to place
them 15mm or more apart from each other.
(2) Recommended torque for mounting screws of M3 screw : 0.49 N·m (5.0 kgf·cm).
(3) All equipment ideally should be mounted inside an earthed shielded metal box. Alternatively an earthed metal plate can be
used to mount the power supply and load to ensure the EMI and EMC performance.
5-3-4. Mounting method for /G2 model
/G2 model is optional model for installation in class II end equipment (without ground connection), such as used inside of a
plastic enclosure.
All four mounting holes on this model should be utilized for support the power supply
Keep enough space from the surrounding of the power supply for safety and cooling requirement, these products need to be fixed such that they
are isolated from unearthed accessible conductive parts by at least 2 MOPP’s for Class II installation.
6. 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 (Protective Earth) terminal and Frame Ground terminal of equipment firmly.
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
CUS100MB: 3.15A
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 power does not over specification.
(5) Check if the output voltage adjust trimmer (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 during Dynamic-Load operation.
(8) Ensure that a large capacitor is not connected across the output terminals. Please use within maximum capacitance shown
below.
Maximum
external
capacitance
MODEL 5V 12V 15V 18V 24V 28V 36V 48V
CUS100MB 10000uF 10000uF 5600uF 5600uF 4500uF 4000uF 4000uF 2000uF
