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      Input module, analog 4 point current.4–Channel Analog Current Input module

      IC694ALG221

      Spare Part Number

      PNIC694ALG221

      Product Information:

      4–Channel Analog Current Input module
      Two range jumpers are provided with the module
      Conversion speed for each of the four channels is one–half millisecond
      Input protection for the module is sufficient for operation with
      reduced performance with up to 200 V common–mode
      • One-year warranty
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      Technical specifications for

      IC694ALG221

      0 TECHNICAL PARAMETERS
      • Manufacturer:
        General Electric
      • Product Category:
        PLC and Machine Control
      • Spare Part Number:
        IC694ALG221
      • Estimated shipping dimensions:
        3.5x13.2x13.5cm
      • Weight:
        0.36 kg
      • Tariff Code:
        8537101190
      • Country of origin:
        USA
      • Place of shipment:
        Xiamen, Fujian, China
      • Input Current Ranges:
        4 to 20 mA and 0 to 20 mA
      • Calibration:
        Factory calibrated to 4 µA per count
      • Update Rate:
        2 milliseconds (all four channels)
      • Resolution at 4–20 mA:
        4 µA (1 LSB = 4 µA)
      • Common Mode Voltage:
        200 volts
      • Series:
        PACSystems RX3i
      • Stock Availability:
        40
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      PRODUCT & ORDER FAQS

      Questions buyers ask about IC694ALG221

      • What core analog signal acquisition functions does the IC694ALG221 module provide within a PACSystems RX3i control architecture?

        The IC694ALG221 is a high‑performance four‑channel differential analog current input module engineered to precisely acquire industrial process signals in the range of 0–20 mA or 4–20 mA and convert them into digital data for PACSystems RX3i CPUs to process.

      • How does the input resolution and data fidelity of the IC694ALG221 influence precision monitoring in process control loops?

        The IC694ALG221 delivers a 12‑bit resolution, equating to roughly 4 μA per count at 4–20 mA and 5 μA per count at 0–20 mA, which ensures high‑fidelity conversion and enables fine‑grained assessment of subtle process variations.

      • In what way does the update cadence of the IC694ALG221 affect real‑time system responsiveness and data throughput?

        The IC694ALG221 maintains a rapid signal sampling rate, with each channel converting in about 0.5 ms and a cumulative update rate of approximately 2 ms for all four channels, supporting high‑speed acquisition for dynamic industrial processes.

      • What diagnostic protections and noise immunity mechanisms are embodied in the IC694ALG221’s design?

        The IC694ALG221 incorporates optical isolation between field wiring and the backplane logic to enhance noise immunity, and sustains up to 200 V common‑mode voltage, aiding robust operation in electrically noisy industrial environments.

      • How is the signal range configurability of the IC694ALG221 implemented, and what flexibility does this provide for various sensors?

        The IC694ALG221 supports jumper‑selectable input ranges such that channels can be configured for either 0–20 mA or 4–20 mA, offering system integrators flexibility in interfacing with a wide variety of current‑output field sensors without external signal conditioning.

      • What are the precision and accuracy specifications that define the measurement integrity of the IC694ALG221?

        The IC694ALG221 exhibits high accuracy with typical performance of ±0.1 % of full scale plus ±0.1 % of reading, ensuring reliable process measurements when integrated into control logic.

      • How are the digital representations from the IC694ALG221 interpreted within the PLC memory space?

        Data from the IC694ALG221 are stored in the PACSystems RX3i CPU using 16‑bit two’s complement format, with scaling such that input currents map into calibrated numeric values (e.g., 4 mA → 0 counts; 20 mA → full scale).
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          Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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