GE IS200STCIH6A 4–20 mA Input Module | 0–60 °C, 16-Channel

Description

Product Introduction

The IS200STCIH6A doubles the channel count of the standard current input module—16 isolated 4–20 mA channels in a single Mark VIe slot. If your turbine has dozens of pressure, flow, and level transmitters, this module saves rack space. It’s the high-density standard current input module for the Mark VIe system, with 16-bit resolution and built-in loop diagnostics.

The “STCIH6” designation tells you this is the high-density standard current input module. The “A” is the base revision. The module has sixteen isolated current inputs that can be configured for 4–20 mA or 0–20 mA. It has 16-bit resolution and ±0.10% accuracy—slightly lower than the 8-channel version due to the higher density. The module also has built-in loop diagnostics—open circuit and short circuit detection. All inputs are isolated to 2,500 V.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

The STCIH6A has sixteen current inputs—our 28-point inspection verifies accuracy and loop diagnostics on all channels.

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 “–STCIH6A” clearly.

Visual Inspection. Magnifying lamp, full board scan. The input circuits are inspected for rework. The 96-pin backplane connector shows zero wear.

Live Functional Test. Mark VIe test rack with a precision current source (4–20 mA) and a reference ammeter.

• Accuracy test: Inject 4 mA, 12 mA, and 20 mA on all 16 channels—verify within ±0.10%.
• Loop diagnostics test: Open the loop—verify open circuit detection. Short the loop—verify short circuit detection.
• 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 current accuracy on all channels, loop diagnostics, isolation test, and a photo.

Field Replacement Pitfalls

The STCIH6A has sixteen current inputs—installation mistakes are similar to the 8-channel version.

Input Range—Program It Correctly. Set the range to match your transmitter. The module can’t auto-detect.

Loop Power—The Module Doesn’t Supply It. The STCIH6A is a passive input—you need an external 24 VDC supply.

Loop Diagnostics—Enable Them. Keep them enabled to detect broken wires.

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 STCIH6A has 16 precision input circuits—refurbishers often can’t test all 16 channels properly.

What “New Original (New Surplus)” means. This IS200STCIH6A came from GE’s factory, never mounted. The input circuits are factory-calibrated. We break the seal only for testing.

Refurbished risk in plain terms. A refurbisher may test only a few channels and assume the rest are good. I’ve tested refurbished STCIH6A units where channels 9–12 were out of spec. Failure rate on refurbished high-density current input modules runs 4× higher than new.

Real cost of a refurbished failure. A pressure reading is off by 2% on channel 9—the turbine control system limits output—lost generation—25,000. The refurbished module saved you 1,000. The failure cost you 25× that.

What we provide as proof. For every IS200STCIH6A we ship: a photo of the OEM packing slip, serial traceability to GE’s records, a full test report that includes current accuracy on all 16 channels, loop diagnostics, 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-density current input 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, hi-pot tester).

• Accuracy—4 mA: Reading 4.00 mA—within ±0.10%.
• Accuracy—12 mA: Reading 12.01 mA—within ±0.10%.
• Accuracy—20 mA: Reading 20.00 mA—within ±0.10%.
• Open circuit detection: Flagged within 50 ms.
• Short circuit detection: Flagged within 50 ms.
• Isolation test: 2,500 V RMS—no breakdown. Insulation resistance >100 MΩ.
• Thermal performance: At 60 °C ambient, the module ran at 55 °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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