9 LOADING AND INSTALLATION
9.6 Wiring
9.6.1 The precautions on the wiring
! DANGER | Completely turn off the external power supply when installing or |
| placing wiring. Not completely turning off all power could result in |
| electric shock or damage to the product. |
| When turning on the power supply or operating the module after |
| installation or wiring work, be sure that the module's terminal covers are |
| correctly attached. Not attaching the terminal cover could result in |
| electric shock. |
CAUTION 
Be sure to ground the FG terminals and LG terminals to the protective ground conductor. Not doing so could result in electric
shock or erroneous operation.
When wiring in the PLC, be sure that it is done correctly by checking the product's rated voltage and the terminal layout. Connecting a power supply that is different from the rating or incorrectly wiring the product could result in fire or damage.
External connections shall be crimped or pressure welded with the specified tools, or correctly soldered. Imperfect connections could result in short circuit, fires, or erroneous operation.
Tighten the terminal screws with the specified torque. If the terminal screws are loose, it could result in short circuits, fire, or erroneous operation. Tightening the terminal screws too far may cause damages to the screws and/or the module, resulting in fallout, short circuits, or malfunction.
Be sure there are no foreign substances such as sawdust or wiring debris inside the module. Such debris could cause fires, damage, or erroneous operation.
The module has an ingress prevention label on its top to prevent foreign matter, such as wire offcuts, from entering the module during wiring.
Do not peel this label during wiring.
Before starting system operation, be sure to peel this label because of heat dissipation.
The precautions on the connection of the power cables are described below.
(1)Power supply wiring
(a)Separate the PLC's power supply line from the lines for I/O devices and power devices as shown below.
When there is much noise, connect an insulation transformer.
| Main power | PLC power | Insulation | ||||||||||||||||||
| transformer | ||||||||||||||||||||
200VAC | supply | supply |
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T1
I/O power supply
I/O devices
Main circuit device
Main circuit device
9 - 23 | 9 - 23 |