ABB AI625

ABB AI625

Product Overview:
The ABB AI625 (Order Code: 3BHT300036R1) is a 16-channel universal analog input module for the ABB S800 I/O and Advant OCS systems. It acts as a high-precision signal acquisition expert, converting physical process variables into digital data for the DCS.

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Category: SKU: ABB AI625

Description

ABB AI625

Technical Specifications:

  • Channel Capacity: 16 independent, software-configurable channels.
  • Input Signals: 0/4–20 mA (with open-wire detection) and ±10 V DC.
  • Resolution: 12-bit (with 14-bit enhanced versions available).
  • Accuracy: ±0.1% of span at 25°C.
  • Isolation: ≥ 500 V AC galvanic isolation between field side and backplane.
  • Power: 24 V DC supplied via backplane; typical power consumption ≤ 3.5 W.
  • Operating Temperature: 0°C to +60°C (extended range up to +70°C for some batches).

Functional Features:

  • Channel-Level Configuration: Each channel can be individually configured for current or voltage via software.
  • Advanced Diagnostics: Front-panel RUN/ERR LEDs and channel-level open-wire/over-range alarms.
  • Hot-Swappable: Supports online replacement when paired with TB805 terminal bases.
  • Noise Immunity: Enhanced filtering to reduce 50/60 Hz power line interference.

Application Scenarios:

  • Oil and gas refining and chemical processing.
  • Power generation (boiler and turbine monitoring).
  • Water treatment and municipal infrastructure.
  • Pulp and paper manufacturing.

Material Composition & Structural Characteristics:

  • Form Factor: S800 I/O width module (~40 mm).
  • Base Compatibility: Requires TU810, TU812, TU814, or TU818 terminal bases.
  • Certifications: CE, UL 508, cULus, IEC 61131-2, RoHS compliant.

Working Principle:
Field signals enter the module and are conditioned by precision analog front-end circuits. The ADC digitizes the signal, and the onboard microcontroller applies scaling, linearization, and diagnostic checks. Data is then transmitted over the S800 I/O bus to the controller.

Installation Requirements:

  • Install on compatible S800 terminal bases and lock securely.
  • Use shielded cables for analog signals, grounding the shield at the cabinet only.
  • Configure channel types and ranges in Control Builder M or Harmony software.

Usage Precautions:

  • Do not mix S800 and S700 series modules in the same rack.
  • Verify firmware compatibility before performing hot-swap operations.
  • Monitor ERR LED for channel-level fault diagnosis.

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