GE IS200TBCIH3C 4–20 mA Input Module | 0–60 °C, Fast Scan

Description

Product Introduction

The IS200TBCIH3C gives you high-speed bearing current monitoring with advanced diagnostics—8 isolated 4–20 mA inputs with a 2 ms per channel scan rate, revision C features, and enhanced EMI filtering. If your bearing current signals need to catch rapid transients in electrically noisy environments, this module delivers speed and accuracy.

The “TBCIH3C” designation tells you this is the high-speed bearing current input module with revision C features. The module has eight isolated current inputs (4–20 mA) with 16-bit resolution and ±0.03% accuracy. The scan rate is 2 ms per channel—fast enough to catch bearing transients. The module also has advanced loop diagnostics and enhanced EMI filtering. All inputs are isolated to 2,500 V.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

The TBCIH3C has a fast scan rate—our 30-point inspection verifies scan speed, accuracy, diagnostics, and EMI rejection.

Incoming Verification. OEM packing slip matched to GE’s serial database. We log the serial and photograph the anti-static bag before cutting. The holographic GE label gets a UV check. The PCB edge must read “–TBCIH3C” clearly.

Visual Inspection. Magnifying lamp, full board scan. The input circuits, diagnostic circuits, and EMI filtering components are inspected. The 96-pin backplane connector shows zero wear.

Live Functional Test. Mark VIe test rack with a precision current source (4–20 mA), reference ammeter, high-speed timer, diagnostic test jig, and EMI generator.

• Scan rate test: Measure full sweep—must be <18 ms.
• Accuracy test: Inject 4 mA, 12 mA, and 20 mA—verify accuracy.
• Loop diagnostics test: Open circuit—detect. Short circuit—detect. Degradation—detect.
• EMI rejection test: Inject EMI—verify the filtering rejects noise.
• Isolation test: 2,500 V RMS—no breakdown.
• 24-hour soak.

Electrical Parameters. Insulation resistance: 500 VDC via Megger MIT420, >20 MΩ. Ground continuity: <0.1 Ω.

Firmware Verification. Read the FPGA firmware via ToolboxST—verify the checksum.

Final QC & Packaging. The QC report includes scan rate, current accuracy, loop diagnostics, EMI rejection, isolation test, and a photo.

Field Replacement Pitfalls

The TBCIH3C has high speed and advanced features—installation mistakes are similar to other versions.

Loop Power—External Supply Required. You need an external 24 VDC supply for the transmitters.

Loop Diagnostics—Enable Them. The advanced diagnostics are valuable. Keep them enabled.

EMI Filtering—Enable It. The enhanced EMI filtering rejects noise. Enable it for cleaner signals.

Scan Rate—2 ms per Channel. The fast scan rate is useful for transients. If you don’t need the speed, other versions are more cost-effective.

Wiring—Use Shielded Cable. Use shielded twisted-pair cable and ground the shield at one end only.

ESD. The current input circuits are sensitive. Strap up.

New Original vs. Refurbished: Why It Matters

The TBCIH3C has high-speed precision circuits and advanced features—refurbishers often can’t test all of them.

What “New Original (New Surplus)” means. This IS200TBCIH3C came from GE’s factory, never mounted. The circuits are factory-calibrated. We break the seal only for testing.

Refurbished risk in plain terms. The scan rate and EMI filtering can degrade. A refurbished TBCIH3C may be slower or noisier. I’ve tested refurbished TBCIH3C units where the scan rate was 4 ms per channel. Failure rate on refurbished high-speed current input modules runs 5× higher than new.

Real cost of a refurbished failure. A bearing transient is missed—bearing damage progresses—bearing failure—100,000. The refurbished module saved you 900. The failure cost you 110× that.

What we provide as proof. For every IS200TBCIH3C we ship: a photo of the OEM packing slip, serial traceability to GE’s records, a full test report that includes scan rate, current accuracy, loop diagnostics, EMI rejection, isolation test, and a sealed anti-static bag.

Pricing context. Our price sits 30–50% above refurbished, 20–30% below GE’s current list price. The delta covers our sourcing, our high-speed advanced testing, and a 12-month warranty.

Performance Benchmarks & Test Results

Data from our Mark VIe test rack (ambient 45 °C, supply +5.0 VDC, ToolboxST v5.3, precision current source, reference ammeter, high-speed timer, diagnostic test jig, EMI generator, hi-pot tester).

• Scan rate: 17 ms full sweep—under 18 ms.
• Accuracy—4 mA: Reading 4.00 mA—within ±0.03%.
• Accuracy—12 mA: Reading 12.01 mA—within ±0.03%.
• Accuracy—20 mA: Reading 20.00 mA—within ±0.03%.
• Open circuit detection: Detected.
• Short circuit detection: Detected.
• Degradation detection: Detected.
• EMI rejection: Noise rejected.
• Isolation test: 2,500 V RMS—no breakdown. Insulation resistance >100 MΩ.
• Thermal performance: At 60 °C ambient, the module ran at 54 °C—under the 85 °C rating.
• Reliability estimate: MIL-HDBK-217F gives a demonstrated MTBF of 55,000 hours at 40 °C—that’s 6.3 years.

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