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Chapter 9 Installation and Wiring
9-3
(6) Power consumption of the special module
•
WS = I5V X 5 + I24V X 24 (W)
(7) The sum of the above values is the power consumption of the entire PLC system.
•
W = WPW + W5V + W24V + Wout + Win + Ws (W)
(8) Check the temperature rise within the control panel with calculation of that total power consumption(W).
The temperature rise in the control panel is expressed as:
T = W / UA [°C]
W : Power consumption of the entire PLC system(obtained as shown above)
A : Control panel inside surface area
[m
2
]
U : if the control panel temperature is controlled by a fan, etc
6
if control panel air is not circulated 4
9.1.2 Handling Instructions
• Do not drop it off, and make sure that strong shock should not be applied.
• Do not unload the PCB from its case. It can cause faults.
• During wiring, be sure to check any foreign matter like wire scraps should not enter into the upper side of the PLC. If any
foreign matter has entered into it, always eliminateit
1) Main unit or Expansion Module handling instructions
The followings explains instructions for handling or installing the Base unit or Expansion Module.
(1) I/O specifications re-check
Re-check the input voltage for the input part. if a voltage over the maximum switching capacity is applied, it can cause
faults, destruction or fire.
(2) Used wire
Select the wire with due consideration of ambient temperature and rated current. Its minimum specifications should be
AWG24(0.18 ) or more.
(3) Environment
When wiring the I/O part, if it locates near a device generating an cause short circuit, destruction or malfunction.
(4) Polarity
Before applying the power to part that has polarities, be sure to check its polarities.
(5) Terminal block
Check its fixing. During drilling or wiring, do not allow any wire scraps to enter the PLC. It can cause malfunction and fault
.