3 Wiring Input/Output Pin
3.1 Wiring input pin
(1) External fuse
¡
Fuse is not built-in on input side. In order to protect the unit, install
the normal-blow type fuse on input side.
¡
When the input voltage from a front end unit is supplied to multiple
units, install the normal-blow type fuse in each unit.
Table 3.1 Recommended fuse (Normal-blow type)
Model
CHS12024
CHS30024
CHS40024
Rated current
15A
20A
40A
Model
CHS6048
CHS8048
CHS12048
Rated current
5A
7A
10A
Model
CHS20048/CHS30048 CHS38048/CHS40048 CHS50048/CHS70048
Rated current
15A
20A
30A
(2) External capacitor on the input side
¡
Install an external capacitor Cin, bVIN and -VIN input
pins for low line-noise and for stable operation of the power sup-
ply.
Capacitance
Refer to Table 2.1
Ta = -20 to +85
C
Electrolytic or Ceramic capacitor
Ta = -40 to +85
C
Ceramic capacitor
¡
Cin is within 50mm for pins. Make sure that ripple current of Cin
is less than its rating.
(3) Recommendation for noise-filter
¡
Install an external input filter as shown in Fig.3.1 in order to re-
duce conducted noise. For details refer to our website technical
data.
+
Load
+VIN
-VIN
RC
+
FG
DC
input
+VOUT
-VOUT
+S
-S
Fig.3.1 Recommended external input filter
(4) Reverse input voltage protection
¡
Avoid the reverse polarity input voltage. It will damage the power
supply.
It is possible to protect the unit from the reverse input voltage by
installing an external diode as shown in Fig.3.2.
+VIN
-VIN
DC IN
Fig.3.2 Reverse input voltage protection
2 Connection for Standard Use
¡
In order to use the power supply, it is necessary to wire as shown
in Fig.2.1.
Reference : 3 ”Wiring Input/Output Pin”
8 ”Derating”
¡
Short the following pins to turn on the power supply.
-VIN RC, +VOUT +S, -VOUT -S
Reference : 4.4 ”Remote ON/OFF”
4.5 ”Remote sensing”
¡
The CHS series handle only the DC input.
Avoid applying AC input directly.
It will damage the power supply.
Cin : External capacitor on the input side
Load
+VIN
Fuse
DC
input
Cin +
RC
-VIN
+VOUT
-VOUT
+S
-S
Fig.2.1 Connection for standard use
Table 2.1 Recommended External capacitor on the input side
Model
CHS12024
CHS30024
CHS40024
Cin
220 F or more
660 F or more
660 F or more
Model
CHS6048
CHS8048
CHS12048
CHS20048
Cin
66 F or more 33 F or more 47 F or more 100 F or more
Model CHS30048/CHS38048/CHS40048/CHS50048
CHS70048
Cin
200 F or more
400 F or more
CHS-31
DC-DC Converters Bus Converter.Power Module Type
Instruction Manual