28-2202 EATON

28-2202  EATON analog module

Product  Description：

An EATON analog module is an expansion unit or a dedicated input/output (I/O) module designed to handle continuous electrical signals, as opposed to the discrete on/off signals handled by standard digital modules. These signals typically represent physical quantities such as temperature, pressure, flow, or speed. The module contains specialized circuitry, including Analog-to-Digital Converters (ADCs) for input modules and Digital-to-Analog Converters (DACs) for output modules. An analog input module takes a voltage or current signal (e.g., $0-10 \text{ V}$ or $4-20 \text{ mA}$) and converts it into a digital value that the PLC's central processing unit can use in its control logic. Conversely, an analog output module converts a digital value from the PLC program back into a continuous signal to drive devices like variable frequency drives or control valves.

Product Parameters

The performance and application of an analog module are defined by several key parameters:

• Signal Type: Can be voltage (e.g., $\pm 10 \text{ V}$, $0-5 \text{ V}$) or current (e.g., $0-20 \text{ mA}$, $4-20 \text{ mA}$). Modules are also specified for temperature inputs like thermocouples (Type J, K, T) or RTDs (Resistance Temperature Detectors, e.g., Pt100).

• Resolution: This is the precision of the conversion, typically expressed in bits (e.g., $12 \text{ bit}$, $14 \text{ bit}$, or $16 \text{ bit}$). Higher bit resolution means finer control and measurement accuracy.

• Number of Channels: Indicates how many analog signals the module can handle, typically $2$, $4$, or $8$ channels per module.

• Conversion Time: The speed at which the ADC or DAC processes a signal, often measured in milliseconds (ms), which is critical for fast processes.

• Accuracy: Expressed as a percentage of the full scale range (FSR), indicating the maximum error expected in the measurement or output.

• Isolation: Specifies the electrical separation between channels and the system backplane, often necessary to prevent ground loops and protect against high voltage.

Product Advantages

EATON analog modules offer several distinct advantages in industrial automation systems:

• High Accuracy and Resolution: They provide the necessary precision for critical control loops, ensuring accurate measurement and repeatable process control.

• Noise Immunity: Designed with robust filtering and often with channel-to-channel isolation, these modules minimize the effects of electrical noise common in industrial settings.

• Flexibility: EATON offers multi-range modules that can be configured for different voltage or current signals via software, reducing spare parts inventory and simplifying deployment.

• System Integration: They seamlessly integrate with the EATON PLC platform (e.g., Easy, XC, XV series), utilizing the common backplane and programming environment for easy configuration and diagnostics.

• Comprehensive Diagnostics: Many modules include built-in diagnostic features such as wire-break detection and out-of-range signal reporting, which aids in rapid troubleshooting and maintenance.

Important Considerations (Precautions)

Proper installation and configuration are vital for the reliable operation of analog modules:

• Wiring Practices: Use shielded, twisted-pair cables for all analog signals and ensure the shield is correctly grounded at only one end, typically the module end, to prevent ground loops and maximize noise immunity.

• Signal Range Matching: The analog module's input/output range must match the signal range of the connected sensor or actuator (e.g., a $4-20 \text{ mA}$ sensor must be connected to a $4-20 \text{ mA}$ configured channel).

• Calibration: Analog modules should be periodically checked and calibrated according to the manufacturer's recommendations to maintain specified accuracy over time.

• Thermal Management: Ensure the module is installed within its specified operating temperature range, as high temperatures can affect the accuracy of the converters.

• Power Supply: The module requires a stable and clean power source as voltage fluctuations can introduce noise and errors into the analog readings.

Product Applications

EATON analog modules are essential in a wide variety of industries where continuous process variables must be monitored and controlled:

• Process Industries: Used in chemical plants, oil and gas, and pharmaceutical facilities to measure and control parameters like level, temperature, and pressure in tanks and reactors.

• HVAC and Building Automation: Employed to monitor and regulate air handling unit (AHU) temperatures, humidity levels, and damper positions.

• Motor Control: Analog output modules provide the necessary signal to variable speed drives (VFDs) to precisely control the speed and torque of industrial motors.

• Water and Wastewater Treatment: Critical for measuring flow rates, pH levels, and chlorine concentration.

• Test and Measurement Systems: Utilized in laboratories and manufacturing quality checks to acquire precise data from transducers and load cells.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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