1
CSM_PLC Installation_TG_E_1_1
Installation of PLC Control Panel
Introduction
In order to ensure the reliability and security of the system, prior to the design of the system it is important to make certain that the conditions in
which it will be installed is well understood.
Basically, the stresses on the PLC system (temperature, humidity, vibrations, shocks, corrosive gases, overcurrent, noise etc.) need to be reduced
as much as possible. However, the extent to which measures need to be taken in this regard will depend upon the likelihood of problems arising,
the conditions in which the system is installed, and the cost of implementing measures. By taking advanced measures to prevent problems, the
reliability of the system can be improved, and in the long-term the operation rate can also be increased.
For the individual specifications of each unit, please see the respective user manuals.
Installation/Conditions of PLC Control Panel
The following describes the environmental conditions and measures to be taken for the installation of the PLC control panel (hereafter, "the panel")
■
Temperature
Based on the operating temperature of the element parts of the PLC,
the operating temperature for the system is generally between 5°C
and 40°C. At the same time, with both forced and natural cooling of
the panel, the fact that it is miniaturized to save space means that
from our experience the temperature of the panel is sometimes 10°C
to 15°C higher than the ambient temperature of the room. As such, it
is important that the following measures be taken depending on the
installation site and the temperatures being generated to make
certain that the panel's internal temperature does not exceed the
range of the unit operating temperature, and to provide a sufficient
margin for the range of operating temperature.
●
High Temperature
(see Figure 1)
1
Natural Cooling (Natural draft at the top and bottom of Panel)
When installing the panel, it is optimal not to make use of
cooling devices such as fans and coolers. The following are
important points in the installation of the PLC.
• Do not install in the upper part where the warm air in the panel
stagnates
• In order to ensure ventilation space, maintain a sufficient
distance from other machinery, wiring ducts etc around the
panel
• Do not install in positions other than those specified (for
example upside down), which can lead to the generation of
abnormal heat within the PLC
• Do not install directly above devices that generate heat such as
heaters, transformers and high-capacity resistors etc.
• Avoid direct sunlight
2
Forced Ventilation (forced ventilation by use of a fan directly
mounted at Top of Panel)
3
Controlled Circulation (controlled circulation by means of a fan in
the airtight enclosure panel)
4
Full Room Cooling
(Use a cooler to cool the entire room in which the panel is installed)
(Notes)
Environmental conditions and cooling system should be as follows.
• Panel installed in room with low dust
→
1
or
2
• Panel installed in room with dust
→
3
or
4
When using a fan
• Attach an air filter to the suction mouth to prevent the entry of dust
• Periodically wash the air filter in water.
• Temperature sensors should be attached near the PLC to emit an
alarm in the event that the fan or air conditioner break down
etc.
●
Low Temperature
In cold areas where the morning temperature falls below 0°C at the
time of start-up, attach a small space heater inside the panel to heat
the internal temperature to about 5°C. In order for the PLC power
supply to generate heat, don't turn off the power.
PLC
PLC
1
N
a
t
u
r
a
l Cooling
F
a
n
PLC
PLC
3
Controlled Circ
u
l
a
tion
PLC
PLC
Air Filter
F
a
n
2
Controlled Ventil
a
tion
4
Room Cooling
S
y
s
tem
Cooler
Control P
a
nel
Fig
u
re 1. Cooling Bo
a
rd
