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Yokogawa SM21-AG4: pH Single Electrode for Industrial Process Measurement

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October 17, 2025
Category Connection: PLC Interface Module
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Tags:
#PLC Ethernet Module #Digital Output Module #Telematic Control Module
Brief: Discover the Yokogawa SM21-AG4, a high-performance pH single electrode designed for industrial process measurement. This versatile module features 4-channel analog input, 1500Vrms isolation, and supports multiple signal types for precise data acquisition in harsh environments.
Related Product Features:
  • 4-channel analog input module with universal signal support (voltage, current, thermocouple, RTD).
  • High precision measurement with ±0.1% accuracy and 16-bit resolution.
  • 1500Vrms channel-to-channel isolation for reliable operation in noisy environments.
  • Wide operating temperature range from -40°C to +70°C for harsh industrial conditions.
  • Supports Modbus RTU and Ethernet/IP for seamless system integration.
  • Compact DIN-rail mountable design with IP20 protection rating.
  • Automatic sensor diagnostics and configurable alarm thresholds for enhanced monitoring.
  • Low power consumption (1.8W) and compliant with IEC/EN 61326 EMC standards.
Faqs:
  • What types of signals can the Yokogawa SM21-AG4 module handle?
    The SM21-AG4 supports various signal types including voltage (±10V, 0-5V, 1-5V, 0-10V), current (0-20mA, 4-20mA), thermocouple, and RTD inputs with automatic recognition.
  • How does the SM21-AG4 ensure reliable operation in industrial environments?
    The module features 1500Vrms isolation, overvoltage protection, and a wide operating temperature range (-40°C to +70°C), making it suitable for harsh industrial conditions.
  • What communication protocols are supported by the SM21-AG4?
    The module supports industry-standard protocols including Modbus RTU and Ethernet/IP for seamless integration into industrial automation systems.
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