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Product Overview

The IC670ALG620 (Model: IC670ALG620) is a high-precision analog input module designed for Resistance Temperature Detector (RTD) acquisition within the GE Fanuc Field Control I/O system. This module facilitates the direct interface of four independent RTD sensors to a central controller without the need for external signal transmitters. The IC670ALG620 (Part Number: IC670ALG620) is engineered to support both 3-wire and 4-wire RTD configurations, providing automatic lead resistance compensation to ensure high accuracy over long cable distances.

Equipped with a 15-bit plus sign resolution, the IC670ALG620 (Model: IC670ALG620) detects minute thermal shifts, making it essential for critical process monitoring in chemical, pharmaceutical, and power generation sectors. The module features integrated intelligence for detecting field faults such as open sensors, short circuits, and out-of-range conditions, transmitting specific diagnostic bits to the Bus Interface Unit (BIU) for rapid troubleshooting.

Detailed Technical Specifications

The IC670ALG620 maintains high signal integrity through rugged galvanic isolation and advanced digital filtering.

  • Manufacturer: GE Fanuc (Emerson)

  • Model Number: IC670ALG620

  • Series: Field Control I/O

  • Module Type: Analog Input (RTD Specialized)

  • Number of Channels: 4 Independent channels

  • RTD Support: 3-wire and 4-wire (Platinum, Nickel, Copper)

  • Digital Resolution: 15 bits plus sign

  • Conversion Time: 210 ms (at 60 Hz) / 230 ms (at 50 Hz)

  • Input Fault Detection: Open RTD, Short circuit, Under/Overrange, High/Low alarm

  • Normal Mode Rejection: 60dB at 50/60 Hz

  • Common Mode Rejection: 120dB at 50/60 Hz

  • Maximum Lead Resistance: 5 ohms per lead (for rated accuracy)

  • Temperature Sensitivity: ±0.004% of reading (0°C to 60°C)

  • Bus Current Draw: 190 mA maximum from the BIU

  • Isolation: 1500 VAC (1 minute); 250 VAC (Continuous)

  • Operating Temperature: 0°C to +60°C (32°F to 140°F)

  • Storage Temperature: –40°C to +85°C

  • Dimensions: Standard Field Control module footprint

  • Weight: 0.45 kg (1.00 lbs)

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