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Safety symbols are classified into two categories: “WARNING” and “CAUTION”.
⚠️ Warning: This symbol describes situations that could cause major or fatal injury to the user.
⚠️ Caution: This symbol describes situations that may cause minor injury or damage to the device.
SAFETY SYMBOLS USED IN THIS PRODUCT MEAN:
⚠️ This symbol warns the user of potential hazards.
This symbol warns the user of uninsulated voltage within the unit that can cause dangerous electric shock.
Keep this manual nearby the user operating devices so it can be easily checked.
Design Precautions (⚠️ Warning)
Please install a safety circuit to protect the entire control system in case of an unexpected power shut-down or PLC module malfunction. Such anomalies may severely compromise the integrity of the overall system.
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The overcurrent protection or overvoltage protection of the power supply module is
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activated.
The PLC CPU detected a failure, such as the watchdog timer error or module installation
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failure, with its self-diagnostic function.
In addition, all outputs may be turned on when there is a failure that the PLC CPU cannot detect, such as in the relay or TR terminal. Build an extra monitoring circuit that will monitor any output signal that could cause serious accidents.
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Precautions for design (⚠️ Caution)
Do not bundle the input/output signal or communication cables with the main circuit and power cables. They should be installed at least more than 100 mm (3.94inches) apart. Not doing so could result in output failure or malfunction.
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Precautions for mounting (⚠️ Caution)
Use the PLC in an environment that meets the general specifications given in this manual.
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Precautions for wiring (⚠️ Warning)
Make sure to check the device’s rated voltage and circuit arrangement before wiring. Failure to do so may cause electric shock or damage to the device.
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Precautions for wiring (⚠️ Caution)
Make sure to check the device’s regular voltage and sequence of terminals. Failure to do so may cause fire, electric shock, and malfunctions.
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Precautions for wiring of CPU (⚠️ Caution)
Only a Class2 circuit can be used as the input power of the CPU module.
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Precautions for test run and repair (⚠️ Warning)
Please do not touch the terminals when the power is on. Doing so could cause an electric shock or malfunctions.
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Precautions for test run and repair (⚠️ Caution)
Do not dissociate the PCB from the module’s casing or make any modifications to the device. Doing so may cause fire, electric shock, or malfunction.
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Precautions for disposal (⚠️ Caution)
When the product is disposed of, it should be done according to your country’s regulations for similar types of industrial waste. Not doing so may cause an occurrence of toxic substances or explosions.