4 Series and Parallel
Operation
4.1 Series operation
¡
Series operation is available by connecting the outputs of two or
more power supplies as shown below. Output current in series
connection should be lower than the lowest rated current in each
unit.
Load
Load
Power
Supply
Power
Supply
Load
Power
Supply
Power
Supply
(a)
(b)
Fig.4.1 Examples of series operation
4.2 Parallel operation
¡
Parallel operation is not possible.
¡
Redundancy operation is available by wiring as shown below.
Power
Supply
Power
Supply
Load
I
I
1
I
3
2
Fig.4.2 Example of Redundancy Operation
¡
Even a slight difference in output voltage can affect the balance
between the values of I
1
and I
2
.
Please make sure that the value of I
3
does not exceed the rated
current of a power supply.
I
3
the rated current value
4.3 Various connection methods
¡
Using one smoothing capacitor, up to two TUHS can be operated.
Shown an example in Fig.4.3.
¡
Total output wattage must be less than the maximum wattage of
TUHS which AC is supplied.
¡
When connect different wattage of TUHS, please input AC into the
power supply which the wattage is higher.
¡
When smoothing capacitor is commonly used, noise may become
big because of the length of the power line. The noise can be
attenuate by connecting Line Filter between TUHS and R1.
¡
Avoid connecting AC input and DC input at the same time because
it may damage the TUHS or an equipment(Fig.4.4).
+Vout
+BC
AC1
AC2
-BC -Vout
F1
R1
Load
+
Cbc
+Vout
+BC
AC1
AC2
-BC -Vout
F1 D1
Load
+
Cbc
+Vout
+BC
AC1
AC2
-BC
-Vout
Load
+Vout
+BC
AC1
AC2
-BC
-Vout
Load
SK1
C1(TUHS25)
(a) AC input , Cbc common
(b) DC input , Cbc common
Fig.4.3 TUHS connect method
SK1
+Vout
+BC
AC1
AC2
-BC
-Vout
F1
R1
Load
+
Cbc
Fig.4.4 TUHS Connection prohibition
4.4 Long hold-up time connection
¡
It is possible that setting the hold-up time of the power supply for a
long time by connecting like Fig.5.5. Please set the charge current
of the CL to become less than 1A. Please use the diode which
reverse voltage is 600V or more.Please contact us for detail.
F1
R1
+Vout
+BC
AC1
AC2
-BC
-Vout
D
L
R
L
Load
+
Cbc
C
L
SK1
C1(TUHS25)
+
Fig.4.5 Long hold-up time connection
AC-DC Power Supplies PCB Mount Type
Instruction Manual
TUHS-19
June 26, 2020
