1 Terminal Block
MMC-12
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MMC8A
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MMC50A MMC75B MMC100B
AC(N)
NC
AC(L)
Output voltage adjustable potenti5V)
LED(+5V)
V1 Output
G1(V1) GND
V2 Output
G2(V2, V3) GND
V3 Output
Frame ground
2 Function
2.1 Input voltage range
2.2 Inrush current limiting
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The range is from AC85V to AC132V or DC110V to DC170V.
AC input voltage must have a range from AC85V to AC132V for
normal operation. If the wrong input is applied, the unit will not op-
erate properly and/or may be damaged.
In cases that conform with safety standard, input voltage range is
AC100-AC120V(50/60Hz).
Inrush current limiting is built-in.
If a switch on the input side is installed, it has to be the one han-
dling the input inrush current.
A
Output
V
olt
age
[V]
V
Load factor [%]
100
Fig. 2.1 Current foldback characteristics
Note: In case of nonlinear load, the output is locked out at A point.
: Load characteristics of power supply.
: Characteristics of load (lamp, motor, constant current load, etc.).
Frame ground
AC(L)
AC(N)
LED(+5V)
Output voltage adjustable potenti5V)
V1 Output
G1(V1) GND
V2 Output
G2(V2, V3) GND
V3 Output
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MMC50A
MMC75B MMC100B
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The thermistor is used for protection from inrush current. When
power is turned ON/OFF repeatedly within a short period of time,
it is necessary to have enough time for power supply to cool
down.
The thyristor technique is used for protection from inrush current.
When power is turned ON/OFF repeatedly within a short period of
time, it is necessary to have enough time between power ON and
OFF to operate resistance circuit for inrush current.
Overcurrent protection is built-in and comes into effect at over
105% of the rated current.
Overcurrent protection prevents the unit from short circuit and
overcurrent condition of less than 20 sec.
The unit automatically recovers when the fault condition is cleared.
When the overcurrent/short circuit condition continues more than
20 seconds, it may damage devices inside the power supply.
The power supply which has a current foldback characteristics may
not start up when connected to a nonlinear load such as a lamp,
motor or constant current load. See the characteristics below.
2.3 Overcurrent protection
MMC
Instruction Manual
AC-DC Power Supplies Enclosed type
June 29, 2011
