Table of Contents
Advertisement
3. WIRING PRECAUTIONS
•
Make sure to cut off all phases of the power supply externally before attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
•
Perform class D grounding (grounding resistance: 100Ω or less) to the shield of the twisted shield cable (refer to
Subsection 4.2.3).
Do not use common grounding with heavy electrical systems.
•
When drilling screw holes or wiring, make sure cutting or wire debris does not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
•
Install module so that excessive force will not be applied to communication connectors or communication cables.
Failure to do so may result in wire damage/breakage or PLC failure.
•
Make sure to affix the CAN bus connector with fixing screws.
Tightening torque should follow the specifications in the manual.
Loose connections may cause malfunctions.
•
Make sure to properly wire to the terminal block (CAN bus connector) in accordance with the following precautions.
Failure to do so may cause electric shock, equipment failures, a short-circuit, wire breakage, malfunctions, or
damage to the product.
-
The disposal size of the cable end should follow the dimensions described in the manual.
-
Tightening torque should follow the specifications in the manual.
-
Twist the end of strand wire and make sure that there are no loose wires.
-
Do not solder-plate the electric wire ends.
-
Do not connect more than the specified number of wires or electric wires of unspecified size.
-
Affix the electric wires so that neither the terminal block nor the connected parts are directly stressed.
•
Make sure to observe the following precautions in order to prevent any damage to the machinery or accidents due
to abnormal data written to the PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take place. As a guideline, lay the control line
at least 100 mm (3.94") or more away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of a shielded cable.
Do not use common grounding with heavy electrical systems.
•
Place the communication cable in grounded metallic ducts or conduits both inside and outside of the control panel
whenever possible.
4. STARTUP AND MAINTENANCE PRECAUTIONS
•
Do not touch any terminal while the PLC's power is on.
Doing so may cause electric shock or malfunctions.
•
Before cleaning or retightening terminals, cut off all phases of the power supply externally.
Failure to do so may cause electric shock.
•
Before modifying or disrupting the program in operation or running the PLC, carefully read through this manual and
the associated manuals and ensure the safety of the operation.
An operation error may damage the machinery or cause accidents.
•
Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric representative.
•
Turn off the power to the PLC before connecting or disconnecting any extension cable.
Failure to do so may cause equipment failures or malfunctions.
•
Do not drop the product or exert strong impact to it.
Doing so may cause damage.
•
Turn off the power to the PLC before attaching or detaching the following devices.
Failure to do so may cause equipment failures or malfunctions.
-
Peripheral devices, display module, expansion boards, and special adapters
-
Input/output extension units/blocks, FX Series terminal blocks and special function units/blocks
-
Battery and memory cassette
Safety Precautions
(Read these precautions before use.)
(3)
Reference
27
Reference
27
Reference
79
82
92
Reference
79
82
92
Advertisement
Table of Contents
