Wiring - Mitsubishi FX3U-20SSC-H User Manual

FX -20SSC-H Positioning Block User's Manual
3U
5.

Wiring

DESIGN PRECAUTIONS
• Observe the following items. Failure to do so may cause incorrect data-writing by noise to PLCs and result the PLC failure, machine
damage or an accident.
1) Do not lay close or bundle with the main circuit line, high-voltage line, or load line.
Noise and Surge induction interfere with the system operation.
Keep a safe distance of least 100 mm (3.94") from the above lines during wiring.
2) Ground the shield wire or shield of a shielded cable at one point on the PLC. However, do not ground at the same point as high
voltage lines.
• Install in a manner which prevents excessive force from being applied to the built-in connectors dedicated to programming, power
connectors and I/O connectors.
Failure to do so may result in wire breakage or failure of the PLC.
WIRING PRECAUTIONS
• Make sure to cut off all phases of the power supply externally before starting the installation or wiring work.
Failure to do so may cause electric shock.
WIRING PRECAUTIONS
• Connect the DC power supply wiring to the dedicated terminals described in this manual.
If an AC power supply is connected to a DC input/output terminal or DC power supply terminal, the PLC will be burnt out.
• Perform class D grounding (grounding resistance: 100. or less) to the grounding terminal in the 20SSC-H with a wire as thick as
possible. Do not connect the grounding terminal at the same point as a heavy electrical system (refer to subsection 5.2.2).
• Make sure to attach the terminal cover offered as an accessory to the product before turning on the power or starting the operation
after installation or wiring work.
Failure to do so may cause electric shock.
• Cables and wires for input to the 20SSC-H must be connected to their corresponding dedicated connectors as described in this
manual. For example, if you connect an AC power cable to a DC input connector, they will burn out.
• Do not wire vacant terminals externally.
Doing so may damage the product.
• When drilling screw holes or wiring, cutting chips or wire chips should not enter ventilation slits. such an accident may cause fire,
failures or malfunctions.
• Properly perform wiring to the FX Series terminal blocks following the precautions below in order to prevent electrical shock, short-
circuit, breakage of wire, or damage to the product:
- The disposal size of the cable end should follow the dimensions described in this manual.
- Tightening torque should be between 0.5 to 0.8 N
• Do not wire or bundle the SSCNET III cable with the main circuit cable, power cable and/or other such load carrying cables other than
those for the PLC. Separate these cables at least 100mm (3.94") from each other.
Noise and Surge induction interfere with the system operation.
• When pulling out SSCNET III cable from the connector, be sure to put the cap on SSCNET III connector.
If the SSCNET III end face is dirty, optical transmission is interrupted and it may cause malfunctions.
• Do not see directly the light generated from SSCNET III connector of servo amplifier or 20SSC-H.
When the light gets into the eyes, it causes discomformity in the eyes.
(The light source of SSCNET III corresponds to class1 defined in JISC6802 or IEC60825-1.)
• If SSCNET III cable is added a power such as a major shock, lateral pressure, haul, sudden bending or twist, its inside distorts or
breaks, and optical transmission will not be available.
SSCNET III cable should be given loose slack to avoid from becoming smaller than the minimum bend radius, and it should not be
twisted.
• Make sure to use SSCNET III cable within the range of operating temperature (refer to subsection 5.1.1) described in this manual.
The optical cable and code part melts down if being left near the fire or high temperature. Therefore, do not make it touched the part
which becomes high temperature, such as radiator or regenerative brake option of servo amplifier, or servomotor.
• Make sure to lay SSCNET III cable with greater radius than the minimum bend radius. (Refer to the Section 5.4.1 Precautions for
SSCNET III cable wiring.)
• Fix the optical cable at the closest part to the connector with bundle material in order to prevent SSCNET III cable from putting its own
weight on SSCNET III connector.
• Never use vinyl tape for optical cord. Plasticizing material in vinyl tape goes into optical fiber and lowers the optical characteristic. At
worst, it may cause wire breakage. If using adhesive tape for the optical cable laying, the fire resistant acetate cloth adhesive tape
570F (Teraoka Seisakusho Co., Ltd) is recommended.
If laying with other wires, do not make the optical cable touched wires or cables made from soft polyvinyl chloride (PVC), polyethylene
resin (PE), teflon (Fluorocarbon resin) or nylon which contains plasticizing material.
•
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