¿
Single Output
¿
Dual(
�
)Output
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Case Connecting Pin Terminal
Units come with a case connecting pin terminal. If this pin ter-
minal is connected to -Vin, radiation noise from the main body
decreases. Solder the case connecting pin terminal to PCB to
improve reliability.
1 Pin Terminal Configuration
2.3 Isolation
¡
When you run a Hi-Pot test as receiving inspection, gradually in-
crease the voltage to start. When you shut down, decrease the
voltage gradually by using a dial. Please avoid a Hi-Pot tester
with a timer because, when the timer is turned ON or OFF, it may
generate a voltage a few times higher than the applied voltage.
2.4 Output Voltage Adjustment Range
¡
The output voltage is adjustable through an external potentiom-
eter. Adjust only within the range of
�
5% of the rated voltage.
¡
To increase the output voltage, turn the potentiometer clockwise
and connect in such a way that the resistance value between
2
and
3
becomes small.
To decrease the output voltage, turn the potentiometer counter-
clockwise.
¡
Please use a wire as short as possible to connect to the potenti-
ometer and connect it from the pin terminal on the power supply
side. Temperature coefficient deteriorates when some types of
resistors and potentiometers are used. Please use the following
types.
Resistor..............Metal Film Type, Temperature Coefficient of
�
100ppm/
C
or below
Potentiometer...Cermet Type, Temperature Coefficient of
�
300ppm/
C
or below
¡
If output voltage adjustment is not required, open the pin terminal
TRM.
¡
In the case of dual output,
�
voltages are adjusted simultaneously.
2 Functions
2.1 Input Voltage Range
¡
If output voltage value doesn’t fall within specifications, a unit may
not operate in accordance with specifications and/or fail.
2.2 Overcurrent Protection
¡
Overcurrent Operation
An overcurrent protection circuit is built-in and activated at 105%
of the rated current or above. It prevents the unit from short circuit
and overcurrent for less than 20 seconds. The unit automatically
recovers when the fault condition is removed.
¡
Current Foldback Characteristic
If a model that has a current foldback characteristic is connected
to a non-linear load such as lamp or motor, or to a constant cur-
rent load, it may not start up. Please see the characteristics be-
low.
On-board type
Instruction Manual
G-38
SU.SUC
On-board type
Instruction Manual
G-39
SU.SUC
Pin No.
Pin Terminal
Name
Function
1
+Vin
+DC Input
2
RC
Remote ON/OFF (excluding 1R5)
3
-Vin
-DC Input
4
+Vout
+DC Output
5
COM
GND of Output Voltage (for Dual Output)
6
TRM
Output Voltage Adjustment (please see 2.4)
7
-Vout
-DC Output
8
Case Connecting
Pin
If connected to -Vin, a case potential becomes
fixed and radiation noise decreases (applicable
only to SUC series).
Fig.2.1 Current Foldback Characteristic
Table 1.1 Pin Terminal Configuration and Functions
Fig.1.1 Pin Configuration
8
7
6
4
3
2
1
RC
Load
Input
Case Connecting Pin
View from Above
+Vin
-Vin
+Vout
-Vout
TRM
8
6
7
5
4
3
2
1
TRM
COM
RC
Load
Load
-Vout
+Vout
-Vin
+Vin
Case Connecting Pin
Input
View from Above
Load
: Characteristic of Load (Lamp, Motor or Constant
Current Load, etc.)
: Load Characteristic of Power Supply
A
V
100
O
ut
pu
t V
ol
ta
ge [
V]
Load Factor [%]
Note : The output may be locked out at Point A when the unit is
connected to a lamp, motor or constant current load.
