Instruction
anual
M
1 Pin Connection
DC-DC Converters PCB Mount type
ZU/ZT-36
l
Single Output
2.3 Isolation
n
For a receiving inspection, such as Hi-Pot test, gradually increase
(decrease) the voltage for the start (shut down). Avoid using Hi-
Pot tester with the timer because it may generate voltage a few
times higher than the applied voltage, at ON/OFF of a timer.
ZU1R5 ZU3 ZU6 ZU10
No. Pin connection
Function
+DC INPUT
-DC INPUT
+DC OUTPUT
COMMON
-DC OUTPUT
Case connecting
pin
If connected to -side of input, the case potential can be
fixed and the value of radiation noise can be reduced.
+Side of input voltage
-Side of input voltage
+Side of output voltage
GND of output voltage (Only applicable for Dual output)
-Side of output voltage
l
Dual(±)Output
l
connecting pin
Case connecting pin is available. By connecting this pin to -side
of input, the radiation noise from main body can be reduced.
2 Function
2.1 Input voltage
n
n
If the wrong input is applied, the unit will not operate properly
and/or may be damaged.
Overcurrent protection circuit is built-in and comes into effect at
over 105% of the rated current.
Overcurrent protection prevents the unit from short circuit and
over current condition of less than 20 sec. The unit automatically
recovers when the fault condition is cleared.
2.2 Overcurrent protection
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.).
n
n
Input filter is built-in. A capacitor Ci, if installed near the input ter-
minal, will lower the input conducted noise from converter due to
the formation of the
type filter.
When the distance from the DC line to the unit is greatly ex-
tended, it makes the input feedback noise much higher and the in-
put voltage several times higher than the normal level when
turned ON. If this happens, the output power also becomes un-
stable. In order to prevent the unit form failing in this way; please
connect Ci to the input terminal. In addition, when the filter with
”L” is used, please Ci to the input terminal.
3 Wiring to Input/
Output Pin
Fig.3.1 Connecting method of capacitor at input terminal
Model
ZUS1R5
ZUW1R5
100
47
33
10
ZUS3
ZUW3
220
100
47
22
ZUS6
ZUW6
470
220
100
47
ZUS10
ZUW10
470
220
100
47
3, 5
12
24
48
Input voltage(V)
Capacity of external capacitor at input terminal: Ci [µF]
n
The power supply which has a current foldback characteristics
may not start up when connected to nonlinear load such as lamp,
motor or constant current load. See the characteristics below.
ZU/ZT
