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GE IC670ALG620 RTD Input Module
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- Part Number: IC670ALG620
- Brand: Honeywell
- Type: RTD Input Module
- Dimensions: 4x18.5x12.7cm
- Country of Origin: USA
- Barcode: 8537101190
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Additional Specifications
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Product Description
The GE Fanuc IC670ALG620, also cataloged as the IC670 RTD Input Module, operates as a dedicated hardware component for temperature data acquisition within Field Control I/O stations. The solid-state module directly interfaces up to 4 independent Resistance Temperature Detectors (RTDs) natively at the hardware tier to measure and linearize thermal characteristics across modular processing frameworks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC670ALG620 |
| Brand | GE Fanuc Emerson |
| Origin | USA |
| Weight | 1.00 lbs (0.45 kg) |
| Dimensions | Standard Field Control I/O module footprint |
| Operating Temp | 0 to 60 deg C standard industrial unventilated enclosure tolerances |
| Temperature Sensitivity | +/-0.004% of reading, +/-1.5mV per deg C referred to input (0 to 60 deg C) |
| Channel Density | 4 input channels |
| Sensor Compatibility | 3-wire and/or 4-wire RTDs (Platinum, Nickel, Nickel/Iron, Copper configurations) |
| Selectable Resistance Ranges | 0 to 500 Ohms / 0 to 3000 Ohms |
| Digital Resolution | 15 bits plus sign |
| Scan Time Profile | 60 Hz line frequency: 210 ms / 50 Hz line frequency: 230 ms |
| Normal Mode Rejection | 60 dB at 50/60 Hz, 100% span |
| Maximum Lead Resistance | 5 Ohms maximum resistance per lead wire |
| Fault Diagnostics | Open RTD wire detection, input short circuit, underrange, overrange, high/low alarm |
| Status Indicator | 1 front-panel LED (On = Normal, Off = No Power, Flashing = Fault) |
| BIU Power Consumption | 190 mA maximum current drawn from Bus Interface Unit backplane |
| Product Type | Analog Input Modules |
Industrial Control & DCS Instrumentation Interface
- Channel-to-Channel Isolation Control and Signal Filtering The electronic input circuitry incorporates localized isolation parameters to separate high-frequency industrial noise from the core logic processing sub-assembly. The module includes active filtering that provides a normal mode rejection ratio of 60 dB at 50/60 Hz grid frequencies, preventing electromagnetic interference from distorting precision millivolt temperature registers.
- Cold Junction and Lead Resistance Cancellation Management For 3-wire and 4-wire RTD sensor drops, the module applies real-time lead resistance compensation techniques natively at the terminal layer. By sampling the voltage drop across matching return leads (up to a 5 Ohms per lead wire physical constraint), the processing matrix mathematically eliminates lead-induced measurement skew, stabilizing the 15-bit digital resolution output against shifting field conductor lengths.
Frequently Asked Questions
Q: How should an unused channel be managed on the IC670ALG620 to avoid diagnostic errors?
A: Unused channels must be configured as inactive points within the station database using a handheld programmer via the Bus Interface Unit. If left active but disconnected, the module open-circuit diagnostic logic will trigger a persistent open RTD fault register and flash the front-panel indicator LED.
Q: Which explicit sensor materials are supported within the module pre-defined lookup tables?
A: The firmware contains factory-loaded linearization curves for standard industrial RTD formulations. This allows direct data parsing for platinum (e.g., Pt100), nickel, nickel/iron, and copper resistive sensor elements without the need for custom scaling algorithms in the host PLC.
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