Mitsubishi FX3U-20SSC-H User Manual page 4

• Connect the extension cables, peripheral device cables, input/output cables and battery connecting cable securely
to their designated connectors. Unsecured connection 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 exposed 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 to avoid failure 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 cutting or wiring debris does 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 PLC's ventilation port when installation work is completed. Failure
to do so may cause fire, equipment failures or malfunctions.
• Make sure to attach the terminal cover, offered as an accessory, 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.
• Use class D grounding (grounding resistance of 100Ω or less) with wire as thick as possible on the grounding
terminal of the 20SSC-H. However, do not connect the ground terminal at the same point as a heavy electrical
system.
• Make sure to attach the terminal cover, offered as an accessory, before turning on the power or initiating operation
after installation or wiring work. Failure to do so may cause electric shock.
• Make sure to connect cables and wires to the power/signal inputs of the 20SSC-H as described in this manual.
Connecting AC power cables with DC power sources or DC I/O terminals will burn out the hardware components.
• Do not wire vacant terminals externally. Doing so may damage the product.
• When drilling screw holes or wiring, make sure cutting or wiring debris does not enter the ventilation slits. Failure to
do so may cause fire, equipment failures or malfunctions.
• Make sure to properly wire the FX Series terminal blocks in accordance with the precautions below in order to
prevent electric shock, a short-circuit, wire breakage, 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 and 0.8 N
• 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.
Safety Precautions
(Read these precautions before using.)
•
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