Chapter 9 Installation and Wiring
9-
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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 eliminate it.
1) Base 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 vol tage 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)Wiring
• Wiring I/O wires with high voltage cable or power supply line can cause malfunction or
disorder.
• Be sure that any wire does not pass across during input LED(I/O status will not be
clearly identified).
• If an inductive load has been connected to output part, connect parallel surge killer or diode
to a load Connect the cathode part of the + part of the power supply.
(6) 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
.
(7) Be cautious that strong shock does not applied to the I/O part.
Do not separate the PCB from its case
.
OU
COM
Output part
Induction load
Surge Killer
OU
COM
Output part
Induction load
Diode
+
-
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