TDK-Lambda DRB120-1 Serie Mode D'emploi page 15

PA634-04-01C
3. Terminal Connecting Method
Pay attention to the input wiring. If it is connected to wrong
terminal, the power supply will be damaged.

Input must be off when making connections.

Connect (Protective Earth) terminal of input
connector to ground terminal of the equipment.

The output load line and input line shall be separated
and twisted to reduce noise sensitivity.
When connecting or removing input and output wire, do
not apply stress to PCB.
4. Explanation of Functions and Precautions
4-1. Input Voltage Range
Input voltage range is single phase 85 ~ 264VAC (47~63Hz)
and can withstand 300VAC surge for 5 seconds during
operation. Input voltage which is out of specification may
cause unit to damage. For cases where conformance to various
safety specs (UL, CSA, EN) are required, input voltage range
will be 100 ~ 240VAC (50/60Hz).
4-2. Output Voltage Range
Output voltage is set to the rated value at shipment. V.ADJ
trimmer on the front panel side can be used to adjust the
output voltage (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 the output voltage will shut down. Furthermore,
when increasing the output voltage, reduce the output current
so as not to exceed the maximum output power.
4-3. Over Voltage Protection ( OVP )
The OVP function will shut down the output. To reset the
OVP, disconnect the input voltage from the power supply for
a minute and then re-apply. Possible to hiccup if the unit prior
to OVP point is already overloaded. The OVP point is fixed
and cannot be adjusted externally.
4-4. Over Current Protection ( OCP )
Hiccup mode with automatic recovery. If the output current
is >101% of peak load, the unit will hiccup. Avoid
continuous operation in overload or short condition as it
may result in damage to the power supply.
4-5. Peak output current
The DRB120 can deliver 120% peak current for 10
seconds aiding the startup of capacitive loads and
operation of downstream circuit breakers. The operating
conditions for peak output current are as followed:
(a) Duty cycle of peak current, D ≤35%
(b) ≤ rated output power and RMS current
(c) Reduce peak current according to output derating
curve for higher ambient temperature.
(d) Peak output current and its duration are defined as
followed:
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.
+
+
P.S.
C1 C2
-
300mm
C1 : 47uF Electrolytic Capacitor
C2 : 0.1uF Film Capacitor
TDK-Lambda
DRB120 Series
INSTRUCTION MANUAL
Load
1.5m 50 Cable
Oscilloscope
Bandwidth : 20MHz