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4. Explanation of Functions and Precautions
4-1. Input Voltage Range
Input voltage range is single phase 85 ~ 264VAC (47~63Hz)
(not safety approved condition).For cases where conformance
to various safety specs (UL, CSA, EN) are required, input
voltage range will be 100 ~ 240VAC (50/60Hz). Power
supply can withstand 300VAC surge for 5 seconds during
operation. Input voltage which is out of specification may
cause unit damage.
4-2. Output Voltage Range
Output voltage is set to the rated value at shipment. DRL10
output voltage is not adjustable. DRL30,DRL60 and DRL100
V.ADJ trimmer on the front panel side can be used to adjust
the output voltage within the range specified (refer to
specifications for adjustable range).
To turn the trimmer clockwise, the output voltage will be
increased. Take note when the output voltage is increased
excessively, over voltage protection (OVP) function may
trigger and output voltage will be shut down.. Furthermore,
when increasing the output voltage, reduce the output current
so as not to exceed the maximum output power.
4-3. Inrush Current
This series has used Power Thermistor to protect the circuit
from Inrush Current. Please carefully select input switch and
fuse in cases of the high temperature and re-input the power.
4-4. Over Voltage Protection ( OVP )
The OVP function (Inverter shutdown method, manual reset
type) is provided. OVP function operates within specified
range (refer to specification) . To reset OVP, remove the
input of power supply for a few minutes, and then re-input.
OVP value is fixed and not to be adjusted externally. Never
apply more than rated output voltage to output terminal,
which may leads to damage. In the case of inductive load, put
protective diode in series to the output power line.
4-5. Over Current Protection ( OCP )
Hiccup mode with automatic recovery.
OCP function operates when the output current exceeds OCP
specification. The output will be automatically recovered
when the overload condition is cancelled. Do not operate
overload or dead short conditions for more than 30 seconds,
which could result in damage or insulation failure. Due to
internal protective function , output short causes DRL10-1,
DRL30-1 hiccup or latch up, and causes DRL60-1, DRL100-1
hiccup.
4-6. Output Ripple & Noise
The standard specification for maximum ripple value is
measured according to measurement circuit as below. When
load lines are longer, ripple becomes larger. In this case,
electrolytic capacitor, film capacitor, etc. might be necessary
to use across the load terminal. The output ripple cannot be
measured accurately if the probe ground lead of oscilloscope
is too long.
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P.S.
C1 C2
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150mm
DRL-1 Series
INSTRUCTION MANUAL
Load
1.5m 50 Cable
Oscilloscope
Bandwidth : 20MHz
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