
8Switch Mode Power Supply S8JX
Safety Precautions
■Precautions for Safe Use
Mounting
Take adequate measures to ensure proper heat dissipation to
increase the long-term reliability of the Product. Be sure to allow
convection in the atmosphere around devices when mounting.
Do not use in locations where the ambient temperature exceeds the
range of the derating curve.
Use the metal plate as the mounting panel.
Improper mounting will interfere with heat dissipation and may
occasionally result in deterioration or damage of internal parts. Use
the standard mounting method only.
When mounting two or more Power Supplies side-by-side, allow at
least 20 mm spacing between them, as shown in the above
illustration.
Excessive insertion length may result in damage to the internal parts.
Make sure that the insertion length of mounting screws into the
Power Supply section does not exceed the specified length indicated
in the dimensions diagrams on pages 5 to 6.
When using bottom panel mounting, to ensure good heat dissipation,
some openings has to be made. However, it is advisable that the
bottom is not covered at all. When using the units’ screw hole for
mounting, do not tighten the screw more than 2.5 mm from the
surface, using 0.54 N·m torque (recommended).
Wiring
Connect the ground completely. A protective earthing terminal
stipulated in safety standards is used. Electric shock or malfunction
may occur if the ground is not connected completely.
Minor fire may possibly occur. Ensure that input and output terminals
are wired correctly.
Do not apply more than 100 N force to the terminal block when
tightening it.
Regardless of whether the Unit has a cover or not, before performing
machining above the Unit, protect the Unit with a sheet so that the
Unit will be free from such metal dust or chips.
Be sure to remove the sheet covering the Product for machining
before power-ON so that it does not interfere with heat dissipation.
Use the following material for the wires to be connected to the S8JX
to prevent smoking or ignition caused by abnormal loads.
Recommended Wire Type
Selection of Wires
Wires for the power supply should must be carefully selected. Refer
to this table when selecting the wires.
Recommended Maximum Current
The table is applicable to wires with 1 to 4 conductors. Keep the
current value to within 80% of the values shown in this table when
using wires having 5 or more conductors.
Minor electric shock, fire, or Product failure may
occasionally occur. Do not disassemble, modify, or repair
the Product to touch the interior of the Product.
Minor burns may occasionally occur. Do not touch the
Product while power is being supplied or immediately
after power is turned OFF.
Fire may occasionally occur. Tighten terminal screws to
the specified torque of 0.8 N·m.
Minor injury due to electric shock may occasionally occur.
Do not touch the terminals while power is being supplied.
Always close the terminal cover after wiring.
Minor electric shock, fire, or Product failure may
occasionally occur. Do not allow any pieces of metal or
conductors or any clippings or cuttings resulting from
installation work to enter the Product.
The residual voltage of up to 373 V generated within the
Power Supply may occasionally result in electric shock.
Do not touch the internal parts of the Power Supply within
10 seconds after turning OFF the Power Supply.
!CAUTION
20 mm (min)
75 mm (min)
75 mm (min)
Convection of air
Model Recommended wire type
S8JX-03505 AWG 16 to 14 (1.309 to 2.081 mm2)
S8JX-03512 AWG 18 to 14 (0.823 to 2.081 mm2)
S8JX-03524
S8JX-05005 AWG 14 (2.081 mm2)
S8JX-05012 AWG 18 to 14 (0.823 to 2.081 mm2)
S8JX-05024
S8JX-10024
S8JX-15024 AWG 16 to 14 (1.309 to 2.081 mm2)
AWG
No.
Cross-
sectional
area
(mm2)
Configura-
tion
(number of
conduc-
tors/mm)
Vol tag e
drop per
1 A
(mV/meter)
Recommended maximum
current (A)
UL 1007
(300 V at 80°C)
UL 1015
(600 V at 105°C)
30 0.051 7/0.102 358 0.12 ---
28 0.081 7/0.127 222 0.15 0.2
26 0.129 7/0.16 140 0.35 0.5
24 0.205 11/0.16 88.9 0.7 1.0
22 0.326 17/0.16 57.5 1.4 2.0
20 0.517 26/0.16 37.6 2.8 4.0
18 0.823 43/0.16 22.8 4.2 6.0
16 1.309 54/0.18 14.9 5.6 8.0
14 2.081 41/0.26 9.5 --- 12.0
12 3.309 65/0.26 6.0 --- 22.0
10 5.262 104/0.26 3.8 --- 35.0