Installation Manual
（
3
）
Use copper wire only, and recommended wires are shown as below.
AWG
18 16 14 12 10
Rated Current of
Equipment (Amp)
7A 10A 15A 20A 30A
Cross-section of
Lead(mm
2
)
0.8 1.3 2.1 3.3 5.3
Note: 1. Current each wire carries should be de-rated to 80% of the current suggested
above when using 5 or more wires connected to the unit.
2. The maximum allowable wire cross-sectional area for the terminal of the
SDR-75 is 12AWG/2.5 mm
2
.
Make sure that all strands of each stranded wire enter the terminal connection and the screw terminals are
securely fixed to prevent poor contact. If the power supply possesses multi-output terminals, please make
sure each contact is connected to wires to prevent too much current stress on a single contact.
（
4
）
Use wires that can withstand temperatures of at least 80°C, such as UL1007.
（
5
）
Recommended wire strapping length is 5mm (0.197”).
（
6
）
Recommended screwdriver is 4mm, slotted type.
（
7
）
The recommended torque setting for terminals is shown as below.
Model I/P
O/P
DDR-120
6.9 kgf-cm (6 Lb-in)
6.9 kgf-cm (6 Lb-in)
DDR-240
8.06 kgf-cm (7 Lb-in)
5.13 kgf-cm (4.45 Lb-in)
DDR-480
10.3 kgf-cm (9 Lb-in)
8.06 kgf-cm (7 Lb-in)
（
8
）
Suggested fuse is shown as below.
Model Fuse
DDR-120A T10A/L250V
x2
DDR-120B T8A/L250V
x2
DDR-120C T8A/L250V
x1
DDR-120D T4A/L250V
x1
DDR-240B T10A/L250V
x2
DDR-240C T6.3A/L250V
x2
DDR-240D T6.3A/L250V
x1
DDR-480B T10A/L250V*5
DDR-480C T8A/L250V*3
DDR-480D T6.3A/L250V*3
（
9
）
Mounting Instruction
：
Mount as shown in figure only, with input terminals down, or else sufficient cooling will not be possible.
Admissible DIN rail
：
TS35/7.5 or TS35/15
For rail fastening
：
（
a
）
Tilt the unit slightly rearwards.
（
b
）
Fit the unit over top hat rail.
（
c
）
Slide it downward until it hits the stop.
（
d
）
Press against the bottom for locking.
