Specifications; General Specifications - Mitsubishi FX3U-20SSC-H User Manual

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

Specifications

DESIGN PRECAUTIONS
• Provide a safety circuit on the outside of the PLC so that the whole system operates to ensure the safety even when external power
supply trouble or PLC failure occurs.
Otherwise, malfunctions or output failures may result in an accident.
1) An emergency stop circuit, a protection circuit, an interlock circuit for opposite movements, such as normal and reverse rotations,
and an interlock circuit for preventing damage to the machine at the upper and lower positioning limits should be configured on the
outside of the PLC.
2) When the PLC CPU detects an error, such as a watch dog timer error, during self-diagnosis, all outputs are turned off. When an
error that cannot be detected by the PLC CPU occurs in an input/output control block, output control may be disabled.
Design external circuits and mechanisms to ensure safe operations of the machine in such a case.
3) When some sort of error occurs in a relay, triac or transistor of the output unit, output may be kept on or off.
For output signals that may lead to serious accidents, design external circuits and mechanisms to ensure safe operations of the
machine in such cases.
• At forward/reverse rotation limits wiring, make sure to wire in negative logic and use NC contact. Setting in positive logic and using
NC-contact can cause serious accidents.
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.
DISPOSAL PRECAUTIONS
• Please contact a company certified in the disposal of electronic waste for environmentally safe recycling and disposal of your device.
TRANSPORTATION PRECAUTIONS
• The PLC is precision equipment. During transportation, avoid impacts larger than that is specified in the manual of the PLC main unit.
Failure to do so may cause failures in the PLC.
After transportation, check the operations of the PLC.
3.1

General Specifications

The items other than the following are equivalent to those of the PLC main unit.
For general specifications, refer to the manual of the PLC main unit.
Item
Dielectric withstand voltage 500V AC for one minute
Insulation resistance
→ Refer to FX
5MΩ or more by 500V DC Megger
→ Refer to FX
Hardware Edition (Japanese document only)
3UC
Specification
Conforming to JEM-1021
Between all terminals and ground terminal
3 Specifications
3.1 General Specifications
Hardware Edition
3U
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