Yokogawa ASI133 Current Input Module

The Yokogawa ASI133 Current Input Module is designed for accurate and reliable acquisition of analog current input signals in industrial automation and control systems. It supports both 2-wire and 4-wire transmitter configurations and features isolation to ensure safe operation. The module is ideal for systems requiring precise current measurement, with a high withstand voltage rating and minimal drift due to temperature changes.

Technical Specifications

• Model: ASI133
• Number of Input Channels: 8, isolated
• Input Signal: 4 to 20 mA
• Allowable Input Current: 22.5 mA
• Withstanding Voltage: 1500 V AC
• Input Resistance:
  • Power ON:
    • 2-wire: 400 Ω (I=20 mA) to 750 Ω (I=4 mA)
    • 4-wire: 485 Ω (I=20 mA) to 925 Ω (I=4 mA)
  • Power OFF: ≥ 1 MΩ
• Accuracy: ±16 µA
• Step Response Time: 100 ms
• Data Update Period: 10 ms
• Transmitter Power Supply: 16 V DC or higher (output current limit: 20 mA)
• Maximum Normal Mode Input Voltage: 25 V (for 4-wire transmitter)
• Drift Due to Ambient Temperature Change: ±16 µA/10 °C
• Maximum Current Consumption:
  • 150 mA (5 V DC)
  • 450 mA (24 V DC)
• Weight: Approx. 0.30 kg
• External Connection: Pressure clamp terminal (ATSA3□)
• HART Communication: Available
• Barrier Type: Isolated interface