TDK-Lambda CUS250LD Mode D'emploi page 18

(4) Keep minimum 4mm space from the surface to component side and rear side for safety requirement.
(5) Keep enough space in the power supply surroundings and the upper area of components for convection cooling.
As a reference for reliable thermal design, keep the temperature of Heat Sink lower than 100
(6) Rear mounting from bottom side with 4-M3.5 screws is recommended to comply the vibration spec.
(1) The output and input cables shall be separated each other and twisted individually to improve noise sensitivity.
(2) Use all cables 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 FG terminal of input connector and Protective Earth terminal of equipment
firmly.
(5) Recommended torque for the terminal: M3.5 screw, 0.74N·m (7.5kgf · cm).
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.
CUS250LD Series: 6.3A
(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 (Vadj) 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.
The clearance in power supply can meet 3000m altitude of IEC60950-1 and IEC60664-1.
More than 4mm
Test Point
More than 4mm
o
C at Test Point below.
4-M3.5 SCREWS
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TDK-Lambda
CUS250LD Series
Instruction Manual