16
User’s Manual
PMX_MULTI
Installation
Selecting the Load Cables
Current capacity of load cables
A wire’s temperature is determined by the resistive loss based on the current, the ambient temperature,
and the wire’s external thermal resistance. The following table shows the current capacity of heat-resistant
vinyl wires that have a maximum allowable temperature of 60 °C when one of the wires is separated and
stretched out horizontally in air in an ambient temperature of 30 °C. The current must be reduced under
certain conditions, such as when vinyl wires that have a low heat resistance are used, when the ambient
temperature is 30 °C or greater, or when wires are bundled together and little heat is radiated.
Taking measures against noise
When connecting wires that have the same heat resistance, separating the wires as much as possible to
increase heat radiation enables a greater amount of current to flow. However, wiring the + (positive) and -
(negative) output wires of the load cable side by side or bundling them together is more effective against
unwanted noise. The Kikusui-recommended currents shown in the above table are allowable currents that
have been reduced in consideration of the potential bundling of load cables. Use these values as a guide-
line when connecting load cables.
Limitations of the remote sensing function
All wires have resistance. As the wire becomes longer or the current becomes larger, the voltage drop in
the wire becomes greater. This results in a smaller voltage being applied at the load end. This product has
a sensing function that compensates for this voltage drop up to approximately 0.6 V for a single line
If the voltage drop exceeds this level, use wires that have a greater cross-sectional area.
WARNING
Risk of fire.
• Use load cables whose capacity is adequate for the product’s rated output current.
• The output connector and its surrounding area become hot. Use cables whose cov-
ers have heat resistance at 85 °C and higher.
Risk of electric shock.
• Use load cables with a voltage rating that meets or exceeds the product’s isolation
voltage. For details on the product’s isolation voltage, see
CAUTION
• Use load cables with a core diameter that is appropriate for the amount of current being
used and with sturdy, flame-resistant insulation.
Nominal cross-sec-
tional area (mm
2
)
AWG (reference cross-sec-
tional area; mm
2
)
Allowable current
*1
(A)
(Ta = 30°C)
*1.
* Excerpt from Japanese laws related to electrical equipment.
Kikusui-recom-
mended current (A)
0.9
18
(0.82)
17
4
1.25
16
(1.31)
19
6
2
14
(2.08)
27
10
3.5
12
(3.31)
37
-
5.5
10
(5.26)
49
20
