Mitsubishi FX3U-20SSC-H User Manual page 4

• Connect the extension cables, peripheral device cables and input cables securely to their designated connectors.
Loose connections may cause malfunctions.
• Use the product within the generic environment specifications described in section 3.1 of this manual. Never use the
product in areas with excessive dust, oily smoke, conductive dusts, corrosive gas (salt air, Cl
flammable gas, vibration or impacts, or expose it to high temperature, condensation, or rain and wind.
If the product is used in such conditions, electric shock, fire, malfunctions, deterioration or damage may occur.
• Do not touch the conductive parts of the product directly.
Doing so may cause device failures or malfunctions.
• Install the product securely using a DIN rail or mounting screws.
• Install the product on a flat surface. If the mounting surface is rough, undue force will be applied to the PC board,
thereby causing nonconformities.
• When drilling screw holes or wiring, make sure that cutting and wiring debris do not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
• Be sure to remove the dust proof sheet from the ventilation port of product when installation work is completed.
Failure to do so may cause fire, equipment failures or malfunctions.
• Make sure to attach the top cover, before turning on the power or initiating operation after installation or wiring work.
Failure to do so may cause electric shock.
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.
• Connect the DC power supply wiring to the dedicated terminals described in the manual.
If an AC power supply is connected to a DC input terminal or DC power supply terminal, the product will burn out.
• Perform class D grounding (grounding resistance: 100Ω or less) to the grounding terminal on the 20SSC-H with a
wire as thick as possible.
Do not use common grounding with heavy electrical systems (refer to subsection 5.2.2).
• Make sure to attach the top cover, before turning on the power or initiating operation after installation or wiring work.
Failure to do so may cause electric shock.
• Connect the inputs of the 20SSC-H to the dedicated connectors described in the manual.
If an AC power supply is connected to a DC input terminal or DC power supply terminal, the product will burn out.
• Do not wire vacant terminals externally.
Doing so may damage the product.
• When drilling screw holes or wiring, make sure that cutting and wiring debris do not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
• Make sure to properly wire to the FX Series terminal blocks 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 of the PLC main unit.
- Tightening torque should follow the specifications in the manual of the PLC main unit.
• Do not wire or bundle the SSCNET III cables together with or lay them near a main circuit cable, high-voltage line,
or load lines separate from the PLC. As a guideline, lay the SSCNET III cables at least 100mm (3.94") or more
away from power lines. Failure to do so may cause surge induction and/or noise disturbance.
• Optical fiber end face defects that are caused from contaminants may deteriorate the signal transmission rate and
cause malfunction. When removing the SSCNET III cabling from the 20SSC-H port, make sure to attach the
protective caps to the cable connectors and ports.
• Do not remove the SSCNET III cable from its port while the power is ON for the 20SSC-H or Servo Amp. Do not
look directly into the optical fiber cable ends or SSCNET III ports, as doing so may cause eye damage. (The laser
for SSCNET III communication complies with Class 1 as defined in JISC6802 and IEC60825-1)
• When handling the SSCNET III cables, do not expose them to strong impact, lateral pressure, excessive pulling
tension, abrupt bending or twisting. Failure to do so may crack the glass fiber and cause signal transmission loss.
Note that a short SSCNET III cable is highly susceptible to twisting.
• Make sure to use the SSCNET III cable within the allowable temperature range (as shown in subsection 5.1.1). Do
not expose the SSCNET III cabling to fire or excessive heat. Avoid contact with high temperature components such
as the servo amplifier radiator, regenerative brake and servo motor.
• Do not force the SSCNET III cable into a bend radius smaller than the minimum allowable bend radius. (Refer to
subsection 5.4.1 Precautions for the SSCNET III cable wiring.)
Safety Precautions
(Read these precautions before use.)
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