2
NEMIC-LAMBDA
SWS
50
⋅
75
⋅
100
⋅
150
Series
INSTRUCTION MANUAL
3. Explanation of Functions and Precautions
3-1. Input Voltage Range
Input voltage range is single phase 85 ~ 265VAC ( 47 ~
63Hz ) or 120 ~ 330VDC. Input voltage which is out of
specification may cause unit damage.For cases where con-
formance to various safety specs(UL,CSA,EN) are re-
quired,input voltage range will be 100~240VAC ( 50/60Hz ).
3-2. Output Voltage Range
V.ADJ trimmer is for output voltage adjustment within the
range of specifications.To turn the trimmer clockwise, the
output voltage will be increased. Note over voltage protec-
tion ( OVP ) function may trigger if the output voltage is in-
creased excessively.
3-3. Inrush Current
Power Thermistor is built in to protect the circuit from In-
rush Current. Please carefully select input switch and fuse in
cases of the high temperature and re-input the power.
3-4. Over Voltage Protection (OVP)
The OVP function ( Inverter shut down method, manual re-
set type ) is provided. When OVP triggers, the output will be
shut down. The input shall be removed for a few minutes,
and then re-input for recovery of the output. OVP setting is
fixed and not to be adjusted externally.
3-5. Over Current Protection (OCP)
Current limiting, automatic recovery. OCP function operates
when the output current exceeds OCP specifications. The
output will be automatically recovered when the overload
condition is canceled. Do not operate overload or dead short
conditions for more than 30 seconds, which could result in
damage or insulation failure.
3-6. Output Ripple & Noise
Ripple & noise are measured at 20MHz by using a 12’’
twisted pair terminated with a 0.1uF & 47uF capacitor.
When load lines are longer, ripple will become larger. In this
case, electrolytic capacitor, film capacitor, etc. might be nec-
essary to use across the load terminal. The output ripple
cannot be measured accurately if the probe ground lead of
oscilloscope is too long.
3-7. Series Operation
For series operation, either method ( A ) or ( B ) is pos-
sible.
Method ( A )
O utput
Terminal
O utput
Terminal
Load
P ower
Supply
Method ( B )
Power
Supply
Load
Load
Output
Terminal
Output
Terminal
3-8. Parallel Operation
(A) Operation to increase the Output Current is not
possible.
Load
Output
Terminal
Output
Terminal
Power
Supply
