Product Overview

The 100% Brand New GE IC695ALG508 is an 8-channel isolated Resistance Temperature Detector (RTD) input module designed for the PACSystems RX3i platform. It connects directly to 2-, 3-, or 4-wire RTD sensors to deliver high-accuracy temperature and resistance data without external transmitters. The module performs internal linearization and scaling, delivering engineering units directly to the controller for precise thermal management.

Part Number Breakdown

The IC695ALG508 model designation breaks down as follows:

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  IC695: PACSystems RX3i Platform

   

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  ALG: Analog Input Group

   

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  50: RTD/Resistance Input Series

   

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  8: 8-Channel Density

   

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  -AA: Hardware/Firmware Revision (e.g., IC695ALG508-AA)

   

Technical Specifications

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  Channels: 8 Differential, Isolated Inputs

   

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  Sensor Types: Pt 385/391.6, Ni 618/672, Cu 426, NiFe 518

   

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  Resistance Ranges: 0–260 to 0–4200 Ω

   

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  Resolution: 16-bit Integer or 32-bit IEEE Floating Point

   

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  Update Time: 15 ms to 130 ms (filter dependent)

   

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  Isolation: 250 VAC Continuous; 1500 VAC / 2550 VDC Transient

   

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  Backplane Power: 3.3 VDC @ 400 mA, 5 VDC @ 200 mA

   

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  Power Dissipation: 2.5 W Max

   

Engineering Advantages

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  Eliminate Ground Loops: The module provides true channel-to-channel and field-to-backplane isolation. This isolates noisy field grounds from the sensitive controller logic, preventing measurement drift in large, distributed plants.

   

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  Flexible Noise Filtering: Each channel supports configurable notch filters (2.3–28 Hz) to reject specific line frequencies (50/60 Hz) and reduce noise-induced jitter in temperature readings.

   

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  Simplify System Design: The module supports 2-, 3-, and 4-wire RTD configurations, compensating for lead resistance up to 50 Ω. It scales raw resistance directly to Celsius, Fahrenheit, or Ohms, removing the need for external signal conditioners.

   

FAQs

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  Which terminal blocks do I need?

  The IC695ALG508 uses standard 32-point terminal blocks. Compatible options include the IC694TBB032 (Box-style) or IC694TBS032 (Spring-style). For shielded cables, use the extended versions (IC694TBB132 or IC694TBS132) for proper strain relief.

   

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  Can I swap this module while the system is running?

  Yes. The module supports Redundant Input Update (RIUP), allowing hot-swapping of the module without powering down the rack. The system continues to operate using the last valid data while the CPU re-initializes the new module.

   

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  What firmware version do I need?

  To utilize the full feature set of the IC695ALG508, your PACSystems RX3i CPU must be running firmware version 5.5 or later.