Mean Well NMP1K2, Инструкция по эксплуатации

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5.Functions
5.1 Input Voltage
5.2 Inrush Current Limiting
5.3 Output Voltage/ Current Adjustment
◎
Input voltage range is 90~264VAC or 120~370VDC
◎
To ensure proper operation, input voltage must be within the specified range. An incorrect input voltage may cause the unit
operate improperly, lose PFC function, or even damaged in worst case scenario.
◎
The efficiency will be lower at low input voltage range, so the output power needs to be de-rated for input less than 110VAC.
Please refer to Section 7.3 De-rating for more information.
◎
This unit has built-in inrush current limiting circuit.
5.3.1 Output Voltage Adjustment via SVR
5.3.2 Output Voltage Programming (PV)
◎
The output voltage of each module may be trimmed by turning VR60 near the output terminals. Turning VR60 clockwise increases
the voltage, and turning VR60 counter-clockwise reduces the voltage.
◎
Connect the external DC source to PV (PIN8) and GND (PIN 1 or 2) on CN81, as shown in Figure 5-1(left).
◎
Relationship between the output voltage and the external DC voltage is shown in Figure 5-1(right).
◎
When increasing the output voltage, the load current needs to be reduced accordingly to avoid exceeding the maximum output power.
◎
When increasing the output voltage, the load current needs to be reduced accordingly to avoid exceeding the maximum output power.
◎ When reducing the output voltage, the load current cannot exceed the maximum rated output current.
◎
If adding an external switch (relay/ circuit breaker) at the input side is required, choose switches that are able to withstand inrush
current of the units.
◎ Since the inrush limiting circuit mainly consists of thermistors and a relay, inrush current will be much higher than the specified value
if input thermistor is not allowed sufficient time to cool down. After turning off the AC input power, a 10 seconds cool down period is
recommended before turning it on again.
NMS-240
GND
( PIN1 or 2)
PV
( PIN8)
GND
1
GND
2
RC2
VCC2 CS
DC_OK PC
CN81
PV
+S
-S
9
10
EXTERNAL
VOLTAGE (DC)
EXTERNAL VOLTAGE (VDC)
1 2 2.5 3 4 5
PV(Referenced to GND)
100
Vout
Non-Linear
12V only
(E code)
80
60
40
50
20
O
U
T
P
U
T V
O
LT
A
G
E (
%
)
+V
-V
-
+
LOAD
CN81
4 6 810
9 7 5 3
2
1
VR60
LED
Figure 5-1
5
.
3
.
2 Constant Current Level Programming (PC)
◎
The constant current level can be trimmed to 40~100% of the rated current by applying external DC voltage. Connection diagram
and relationship curve are shown in Figure 5-2.
Figure 5-2
NMS-240
GND
( PIN1 or 2)
PC
( PIN7)
GND
1
GND
2
RC2
VCC2 CS
DC_OK PC
CN81
PV
+S
-S
9
10
EXTERNAL
VOLTAGE (DC)
EXTERNAL VOLTAGE (VDC)
1.8 5 6
PC(Referenced to GND)
115
Iout
OLP 115%(typ.)
Non-Linear
80
100
60
40
20
O
U
T
P
U
T C
U
R
R
E
N
T (
%
)
+V
-V
-
+
LOAD
CN81
4 6 810
9 7 5 3
2
1
VR60
LED
5.4 Short-Circuit and Over Current Protection
5.5 Over Voltage Protection
◎
Output modules have built-in short circuit and over current protections. The protection activates when the output is short-
circuited or the output current exceeds 115% ± 10% of the rated output current. The output will automatically recover when the
fault condition is removed.
◎
Each output module has built-in over voltage protection.
◎
The OVP trigger points vary depending on the different output modules. Please refer to 4.2 NMS-240 Output Module Specification
for more details.
◎
Once OVP is triggered, leave the units off for 10 seconds before recycling AC power to power on the unit.
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