User manual

NEMIC-LAMBDA
LS50 ⋅ 75 ⋅ 100 ⋅ 150 Series
INSTRUCTION MANUAL
6. Wiring Method
z The output load line and input line shall be separated and twisted to improve noise sensitivity.
z Use all lines as thick and short as possible to make lower impedance.
z Noise can be reduced by attaching a capacitor to the load terminals.
z For safety and EMI considerations, connect the FG terminal of LS series to mounting set ground terminal.
z The recommended wire type :
Recommended crimp-type terminal
MODEL Recommended
Wire
Recommended torque
D
(MAX)
t
(MAX)
Mounting
Pieces
(MAX)
LS50 ~ LS150 AWG14-22
M3.5 Screws
1.0 N⋅m (9.8 kgf⋅cm) ~
1.4 N⋅m (13.7 kgf⋅cm)
6.8mm 0.8mm 2 piece
Note 1 : When using separate loads, use of two pcs of 0.8mm thick crimp-type terminal is recommended.
Note 2 : For recommended diameter, refer to wire maker recommended allowable current and voltage drop.
Especially, for 3V or 5V models, output current is large. Thick diameter wire is recommended.
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. Use slow-blow fuse or time-lag fuse. Do not use fast-blow fuse. Fuse rating is specified 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.
LS50 : T2A , 250V
LS75 : T2.5A , 250V
LS100 : F4A , 250V
LS150 : F5A , 250V
8. Before concluding that the unit is at fault…
Before concluding that the unit is at fault, make the following checks :
z Check if the rated input voltage is connected.
z Check if the wiring of input and output is correct.
z Check if the wire material is not too thin.
z Check if the output voltage control (V.ADJ) is properly adjusted.
z Check if the output current and output wattage does not exceed the specification.
z Audible noise can be heard during Dynamic Load operation.
z Audible noise can be heard when input voltage waveform is not sinusoidal wave.
z Ensure that a large capacitor is not connected at the output side. Please use within maximum capacitance shown be-
low.
Maximum external capacitance
MODEL 3.3V 5V 12V 15V 24V 36V 48V
LS50 10,000uF 5,000uF 2,000uF 500uF
LS75~LS150 10,000uF 5,000uF 1,000uF
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