The Yokogawa AST143 is an advanced RTD/POT input module designed for precise temperature and resistance measurements in industrial automation applications. It features 16 isolated input channels that support RTD (Resistance Temperature Detectors) and potentiometer (POT) sensors. The module ensures high accuracy and flexibility, making it ideal for applications in various industries, including process control, manufacturing, and environmental monitoring.

Technical Specifications

• Input Channels:
  • 16 isolated input channels
• Input Signal Types:
  • RTD (e.g., PT100, PT1000)
  • Potentiometer (POT)
  • Voltage inputs (±5V)
• Allowable Input Voltage:
  • ±5V
• Withstanding Voltage:
  • 1500 VAC
• Input Resistance:
  • 1 MΩ or larger
• Power ON/Power OFF Input Resistance:
  • 1 MΩ or larger
• Accuracy:
  • RTD: ±0.1°C (at 23°C)
  • Potentiometer: ±80 μV (at 23°C)
• Allowable Total Resistance:
  • ≤ 1000 Ω
• Signal Source Resistance Effect:
  • RTD: ±0.25°C
  • Potentiometer: ±50 μV/10Ω
• Reference Junction Compensation Accuracy:
  • ±1°C
• Measurement Current:
  • AI (Analog Input)
• Temperature Drift:
  • RTD: ±0.25°C/10°C
  • Potentiometer: ±50 μV/10°C
• Data Update Period:
  • 1 second or less
• Burn-out Function:
  • Configurable for all channels
• Maximum Current Consumption:
  • 150 mA (5V DC)
  • 80 mA (24V DC)
• Weight:
  • Approx. 0.30 kg
• External Connection Type:
  • Pressure clamp terminal (ATST4)
• Barrier Type:
  • Isolated interface