OMRON NT31C-ST141B-EV2 Output module

Omron Input Modules Overview

Omron offers a wide variety of input modules for their Programmable Logic Controller (PLC) systems. These modules are used to receive digital or analog signals from field devices such as sensors, switches, and encoders, and convert these signals into levels that the PLC can process.

Product Detailed Description

• Function:

• Digital Input Modules: Receive ON/OFF signals from digital sensors and switches.

• Analog Input Modules: Receive continuous voltage or current signals from analog sensors (such as temperature, pressure, and flow sensors).

• Convert signals from field devices into signal levels required for internal logic processing by the PLC.

• Provide status indication of input signals.

• Some modules offer isolation to protect the PLC system from voltage spikes and noise from field devices.

• Features:

• Multiple point counts (e.g., 8-point, 16-point, 32-point).

• Wide range of voltage and current ratings to accommodate different field devices.

• Plug-in terminal blocks for easy wiring and maintenance.

• LED indicators to display the status of each input point.

• Some modules support hot-swapping.

Product Parameters

As Omron offers a wide variety of input modules, the following are some general parameters. Always refer to the official datasheet for the specific model:

• Digital Input Modules:

• Input Voltage Range: E.g., 24 V DC, 12-24 V DC, 100-240 V AC.

• Input Current: Typical current per input point.

• Response Time: Delay time for signal changes.

• Isolation Voltage: Isolation voltage between input channels and PLC logic.

• Analog Input Modules:

• Input Range: E.g., 0-10 V DC, 4-20 mA, -10 V to +10 V DC.

• Resolution: Precision of analog-to-digital conversion (e.g., 12-bit, 16-bit).

• Accuracy: Accuracy of the measured value.

• Sampling Period: Frequency at which the module reads analog signals.

• Common Mode Rejection Ratio (CMRR): Ability to suppress common-mode voltage interference.

• Isolation Voltage: Isolation voltage between input channels and PLC logic.

• General Parameters:

• Number of Points: Number of input channels per module.

• Connection Method: Plug-in terminal blocks, MIL connectors, etc.

• Operating Temperature: Temperature range for normal module operation.

• Storage Temperature: Temperature range for safe module storage.

• Humidity Range: Humidity range for normal module operation.

• Protection Degree (IP): E.g., IP20.

• Compliance Standards: E.g., CE, UL.

Product Advantages

• High Reliability:

• Omron products are known for their high quality and reliability.

• Wide Variety of Choices:

• Offers various types and specifications of input modules to meet different application needs.

• Ease of Use:

• Plug-in terminal blocks and LED indicators simplify wiring and troubleshooting.

• Strong Compatibility:

• Seamless integration with Omron PLC systems.

• High Performance:

• Provides fast response times and high-precision analog signal acquisition.

• Isolation Function:

• Some modules offer electrical isolation, improving the system's resistance to interference and safety.

Precautions

• Correct Selection:

• Choose the appropriate input module based on the signal type, voltage/current range, and required number of points of the field devices.

• Correct Wiring:

• Connect field devices and input modules correctly according to the wiring diagram, ensuring correct polarity.

• Power Requirements:

• Ensure the PLC system provides the correct power supply required by the module.

• Environmental Conditions:

• Ensure the operating environment temperature and humidity are within the module's allowable range.

• EMC Considerations:

• Take necessary electromagnetic compatibility (EMC) measures to reduce electromagnetic interference.

• Maintenance:

• Regularly check the module's connections and status indicators.

Product Applications

Omron input modules are widely used in various industrial automation fields, including but not limited to:

• Factory Automation:

• Receiving signals from sensors (proximity sensors, photoelectric sensors, limit switches, etc.).

• Receiving operation commands from buttons and switches.

• Reading position and speed information from encoders.

• Process Automation:

• Receiving analog signals from temperature sensors, pressure sensors, flow sensors, and level sensors.

• Monitoring the status of valves and actuators.

• Machine Control:

• Receiving safety signals from safety switches and interlock devices.

• Reading feedback signals from servo drives and inverters.

• Building Automation:

• Receiving signals from environmental sensors (temperature, humidity, illuminance).

• Monitoring the status of security systems and fire alarm systems.

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