1 Pin Connection
1 Connection for Standard Use
¡
To use TUNS series, connection shown in Fig.1.1 and external
components are required.
¡
This product uses conduction cooling method (e.g. heat radiation
from the aluminum base plate to the attached heat sink).
Reference: “Derating”
Load
FG
+
+
F1
TH1
FG
FG
CY
Co
C1
+BC -BC
Cbc
AC IN
AC1
AC2
+VOUT
-VOUT
-S
+S
TUNS50F
TUNS100F
Noise
filter
Heatsink
C2
+S, -S : TUNS100F
Fig.1.1 Connection for standard use
Table 1.1 External components
No. Symbol
Components
Reference
1
F1 Input fuse
2.1 “Wiring input pin (1)”
2
C1 Input Capacitor
2.1 “Wiring input pin (2)”
3
-
Noise Filter
2.1 “Wiring input pin (3)”
4
CY Y capacitor
5
TH1 Inrush current protection thermistor 2.1 “Wiring input pin (4)”
6
Co Output capacitor
2.2 “Wiring output pin (1)”
7
Cbc Smoothing Capacitor for boost voltage 2.3 “BC/-BC pins (1)”
8
C2 Capacitor for boost voltage
2.3 “BC/-BC pins (2)”
9
-
Heatsink
“option parts”
*
*
Please refer to website.
2 Wiring Input/Output Pin
2.1 Wiring input pin
(1) F1 : External fuse
¡
Fuse is not built-in on input side. In order to protect the unit, install
the slow-blow type fuse on input side (as shown in Table 2.1).
Table 2.1 Recommended fuse (Slow-blow type)
Model
TUNS50F
TUNS100F
Rated current
2A
3.15A
(2) C1 : External Capacitor for input side
¡
Install a film capacitor as input capacitor C1 of which the capaci-
tance and ripple current capability are above the values shown in
Table 2.2.
¡
Use a safety approved capacitor with 250V ac rated voltage.
¡
If C1 is not connected, it may cause the failure of the power sup-
ply or external components.
Table 2.2 Input Capacitor C1
No.
Model
Voltage Capacitance Rated ripple
current
1
TUNS50F
AC250V
1μF or more 3A or more
2
TUNS100F
1μF or more 3A or more
(3) CY : Noise filter/Decoupling capacitor
¡
The product doesn’t have noise filter internally.
Please connect external noise filter and primary decoupling capaci-
tor CY for low line noise and stable operation of the power supply.
¡
The operation of the power supply may be unstable due to the
resonance of the filter or inductance.
¡
Install a correspondence filter, if it is required to meet a noise
standard or if the surge voltage may be applied to the unit.
¡
Install a primary decoupling capacitor CY, with more than 470pF,
near the input pins (within 50mm from the pins).
¡
When the total capacitance of the primary decoupling capacitor is
more than 8800pF, the nominal value in the specification may not
be met by the Hi-Pot test between input and output. A capacitor
should be installed between output and FG.
(4) TH1 : Inrush current limiting thermistor
¡
It has a possibility that internal components fail by inrush current,
so please use power thermistor or inrush current limiting circuit to
keep input current below 60A.
¡
If you use power thermistor and turn the power ON/OFF repeat-
edly within a short period of time, please have enough intervals
so that a power supply cools down before being turned on. And
appropriate intervals should be set even if inrush current limiting
circuit except power thermistor is used.
AC-DC Power Supplies Bus Converter.Power Module Type TUNS50F, TUNS100F
Instruction Manual
TUNS-19
July 27, 2020
