WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | GE Fanuc / GE Intelligent Platforms |
| Current Product Brand | Emerson Automation |
| Series | Field Control |
| Part Number | IC670ALG230 |
| Product Type | Current-source analog input module |
| Number of Inputs | 8 |
| Input Configuration | Single-ended, grouped |
| Input Signal | 0–20 mA or 4–20 mA |
| Default Input Range | 0–20 mA |
| Input Current Span | 0.1–20 mA |
| Maximum Input Current | 30 mA |
| Overrange Fault | 20.000–20.500 mA |
| Open-Wire Detection | Approximately 2.0 mA, 4–20 mA range |
| Input Impedance | 249.75–250.25 Ω |
| Digital Resolution | 12 bits typical |
| Analog Resolution | 5.0 µA |
| Accuracy at 25 °C | ±0.05% typical |
| Conversion Time | Approximately 60 µs per channel |
| Input Filter | Approximately 160 Hz |
| Field Supply | 18–30 V DC |
| Nominal Field Supply | 24 V DC |
| Module Current | Approximately 50–51 mA from BIU; verify revision |
| Loop Supply | 24 V DC output for current-source devices |
| Isolation | 1,500 V AC for 1 minute; 250 V AC continuous |
| Input Data | 8 words / 16 bytes |
| Scaling | Performed by the Bus Interface Unit |
| Bus Interface | Compatible Field Control Bus Interface Unit |
| Terminal Blocks | IC670CHS101, IC670CHS102, or IC670CHS103, subject to system requirements |
| Operating Temperature | Verify exact revision and installation manual |
| Dimensions | Approximately 82 × 52.5 × 73 mm |
| Weight | Approximately 230 g |
| Condition | Must be stated as New Original, New Surplus, or Refurbished (tested) |
GE Fanuc IC670ALG230 is an eight-point Field Control current-source analog input module. It accepts software-configurable 0–20 mA or 4–20 mA signals and transfers unscaled input data through a compatible Bus Interface Unit.
The module provides 12-bit typical digital resolution, 5.0 µA analog resolution, approximately 60 µs per-channel conversion time, and 1,500 V AC isolation to ground and logic. Its eight 24 V DC output terminals are common to one another, so field wiring must follow the Field Control terminal diagram.
Product Introduction
GE Fanuc IC670ALG230 is an eight-channel Field Control analog input module for 0–20 mA and 4–20 mA process signals. It supplies loop power to current-source devices, measures each signal through a 250 Ω input circuit, and sends eight words of input data through the Field Control Bus Interface Unit.
This module is suitable for distributed process measurement, instrumentation, and legacy Series 90 control architectures. Verify the BIU model, terminal block, input-range configuration, field supply, module revision, and channel grouping before replacement.
IC670ALG230
IC670ALG230
IC670ALG230
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Module status LED is off | Missing 24 V field supply, loose terminal block, or module power fault | ✅ High | Measure 18–30 V DC at the Field Control field-supply terminals | Check field power and terminal-block connections before replacement |
| All eight channels read zero | Missing common supply, BIU fault, or loss of field power | ✅ High | Verify the common +24 V DC output and check BIU diagnostics | Diagnose shared power and BIU communication first |
| One channel reads zero | Open transmitter loop, incorrect polarity, or failed transmitter | ✅ High | Measure loop current and voltage at the affected channel terminals | Repair the field loop before replacing the module |
| Input reads below expected value | Cable resistance, weak loop supply, transmitter issue, or incorrect scaling | ✅ High | Measure current at the transmitter and module; compare both values | Check loop voltage and scaling before condemning the input |
| Input reads above 20 mA | Transmitter overrange, shorted loop, or incorrect device configuration | ✅ High | Measure the actual loop current with a calibrated meter | Correct the transmitter or loop fault and review overrange diagnostics |
| Open-wire fault appears | Loop current below approximately 2 mA in 4–20 mA mode | ✅ High | Measure continuity and loop current at the field terminals | Repair the open circuit and verify transmitter excitation |
| All channels are noisy | Poor grounding, shield error, EMI, or unstable common supply | ✅ Possible | Trend multiple channels and inspect shield termination and field supply ripple | Correct grounding and noise sources before replacing the module |
| Channel values shift together | Common 24 V supply fluctuation or shared return problem | ✅ Possible | Monitor the common supply while varying field loads | Repair the shared supply or return wiring |
| BIU does not recognize the module | Incorrect terminal block, BIU fault, connector issue, or incompatible configuration | ✅ High | Read BIU diagnostics and inspect the module-to-BIU connector | Verify the exact terminal assembly and BIU compatibility |
| Data has incorrect engineering units | Scaling configured in the BIU or host incorrectly | ❌ Low | Compare raw counts, configured range, and host engineering limits | Correct scaling rather than replacing the input module |
| Fault occurs near 20 mA | Overrange threshold reached at approximately 20.000–20.500 mA | ✅ High | Apply a calibrated current source and observe the fault threshold | Check scaling and transmitter calibration |
| Replacement does not fit | Wrong terminal block, keying, or module revision | ✅ High | Compare the terminal block, key slots, and complete module label | Use the specified IC670CHS terminal block and matching revision |
| Module overheats | Excessive loop current, shorted field wiring, or ambient temperature | ✅ Possible | Measure channel currents and inspect the common 24 V outputs | Remove field shorts and confirm loop load before replacement |
| System loses data during removal | Unsupported hot insertion or BIU/terminal-block limitations | ✅ High | Verify BIU revision, module suffix, and terminal-block type | Follow the approved power-down or hot-insertion procedure |
Important: IC670ALG230 is a current-source input module, not a passive 4–20 mA input card. It provides common 24 V DC loop power through the terminal assembly. Do not connect an external powered current loop without confirming the wiring mode, because the resulting source conflict can damage the transmitter or input circuit.
Frequently Asked Questions (FAQ)
What is GE Fanuc IC670ALG230?
It is an eight-channel Field Control current-source analog input module. Each channel can be configured for 0–20 mA or 4–20 mA operation, and the module sends its input data through a compatible Field Control BIU.
Does IC670ALG230 provide loop power?
Yes. It provides common 24 V DC output terminals for current-source field devices. All eight +24 V DC output terminals are common, so the field wiring and grounding arrangement must follow the GE Fanuc terminal diagram.
Is this a passive analog input module?
No. It is a current-source input module. It powers compatible 2-wire transmitters and measures the returned current. Do not wire it like a passive input channel unless the system documentation explicitly shows the approved arrangement.
What is the difference between 0–20 mA and 4–20 mA mode?
In 0–20 mA mode, zero current represents the low end of the process range. In 4–20 mA mode, approximately 4 mA represents the low end, and the module can detect an open wire when current falls near 2 mA. Configure the range per channel in the BIU or host system.
Which BIU and terminal block does it require?
The module requires a compatible Field Control Bus Interface Unit and a Field Control terminal block. Common terminal-block options include IC670CHS101, IC670CHS102, and IC670CHS103, but the correct choice depends on the station wiring and BIU arrangement.
Can I hot-swap ?
Only if the exact BIU, module suffix, and terminal-block combination supports hot insertion/removal. GE Fanuc documentation identifies hot insertion support for specified BIU revisions and module suffixes. Otherwise, remove power before withdrawing the module.
Does the module perform engineering-unit scaling?
No. The provides unscaled analog input data; analog scaling is performed by the Bus Interface Unit and host control system. Check the BIU configuration before replacing the hardware for a scaling error.
Is the unit new or refurbished?
The part number does not establish condition or revision. State the actual status as New Original, New Surplus, or Refurbished (tested). A useful test report should include all eight current channels, loop excitation, 0–20 mA and 4–20 mA operation, overrange and open-wire detection, BIU communication, status LED operation, isolation checks, and extended-run testing.
