ABB AX670
ABB AX670 - Image 2

ABB AX670

Product Brief:​ The AX670 is an analog mixed-signal I/O module for ABB Advant OCS and compatible DCS systems. It acquires analog field signals (voltage, current, thermocouple, RTD) and provides analog output driving capability for actuators and control loops. Designed for continuous process control with high signal integrity.

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Category: SKU: ABB AX670

Description

ABB AX670

  • Technical Specifications:
    • Supply Voltage: 24 V DC (typical range 18–30 V DC)
    • Analog Inputs: Configurable — 0–10 V, 0/4–20 mA, TC, RTD
    • Analog Outputs: 0–10 V or 0/4–20 mA programmable
    • Resolution: 12-bit or higher ADC/DAC
    • Accuracy: Typically ±0.2% of full scale
    • Isolation: Galvanic isolation between field side and system bus (≥500 V AC)
    • Operating Temperature: 0 °C to +60 °C (some variants –10 °C to +70 °C)
    • Mounting: 35 mm DIN rail or rack-mounted in Advant OCS I/O rack
    • Protection: IP20 (when mounted in enclosure)
    • Certifications: CE, UL, cUL, meets IEC 61000EMC standards
  • Functional Features:
    • Supports multiple analog signal types selectable by software configuration
    • Integrated self-diagnostic functions — open-wire detection, over-range alarm
    • Hot-swap capable in redundant I/O stations
    • LED status indicators for channel activity and fault
    • Electrical ID check prevents mismatched module insertion
  • Application Scenarios:
    • Power plant turbine/generator parameter monitoring
    • Petrochemical and refinery process loops (pressure, temperature, flow)
    • Pulp & paper, metallurgy continuous process control
    • Water treatment pH, conductivity, level monitoring loops
  • Material & Structure:
    • Housing: Flame-retardant ABS/PC plastic with metal shielding plate
    • PCB: Industrial-grade FR4 with conformal coating option
    • Connectors: Screw or spring-cage terminal block (via terminal unit)
  • Working Principle:

    Field analog signals are conditioned through input amplifiers and multiplexed to a high-resolution A/D converter. Digital values are transmitted over the module bus to the controller. Output values from the controller are converted by on-board D/A converters and buffered through isolated output drivers to the field.

  • Installation Requirements:
    • Install in designated Advant OCS I/O rack or on 35 mm DIN rail with proper grounding
    • Use shielded twisted-pair cables for analog signals; connect shield to ground at one end
    • Ensure 24 V DC supply is stable and correctly polarized
  • Precautions:
    • Do NOT mix voltage-type and current-type wiring on the same terminal
    • Verify jumper/resistor settings match sensor type before energizing
    • Avoid disconnecting field wiring while module is live in non-hot-swap configuration

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