IS200STAIS2A I/O Pack | 16 TC Inputs, High-Speed

Description

Product Introduction

Some temperature applications need speed—fast gas turbine transients, exhaust temperature spreads, and rapid thermal cycling events. The GE IS200STAIS2A gives you 16 thermocouple inputs with a faster scan rate than the standard STAIH2A—2 ms per channel (32 ms full sweep) instead of 5 ms per channel. It’s the high-speed TC input module for the Mark VIe system, designed for applications where temperature changes quickly.

The “STAIS2” designation tells you this is a high-speed thermocouple input module. The “A” is the base revision. The module has sixteen isolated TC inputs that can be programmed for J, K, T, E, R, S, B, and N thermocouples. It has 16-bit resolution and ±0.15% accuracy. The scan rate is 2 ms per channel—significantly faster than the 5 ms standard. The module also has built-in cold-junction compensation. All inputs are isolated to 2,500 V.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

The STAIS2A has a fast scan rate—our 28-point inspection verifies the scan speed and accuracy on all 16 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 “–STAIS2A” clearly.

Visual Inspection. Magnifying lamp, full board scan. The TC input circuits (amplifiers, cold-junction sensor) are inspected for rework. The 96-pin backplane connector shows zero wear.

Live Functional Test. Mark VIe test rack with a precision thermocouple simulator (mV source) and a high-speed timer.

• Scan rate test: Measure the time from first channel to last channel—must be <35 ms.
• Accuracy test: Simulate 0 °C, 100 °C, and 500 °C for J, K, and T types on all 16 channels—verify within ±0.15%.
• Cold-junction compensation test: Verify CJC corrects for ambient temperature changes.
• 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, temperature accuracy, CJC test, isolation test, and a photo.

Field Replacement Pitfalls

The STAIS2A is a high-speed TC module—installation mistakes are similar to other TC modules.

TC Type—Program It Correctly. Each input must be programmed for the correct TC type. The module can’t auto-detect.

Polarity—TCs are Polarity-Sensitive. Connect positive and negative correctly.

Cold-Junction Compensation—The Sensor is Onboard. Keep the terminal block at ambient temperature.

Scan Rate—2 ms per Channel. The fast scan rate is useful for transients. If you don’t need the speed, the standard STAIH2A is more cost-effective.

Extension Wires—Use the Correct TC Extension Wire. Use TC extension wire (not copper) between the TC and the module.

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

New Original vs. Refurbished: Why It Matters

The STAIS2A has high-speed input circuits—refurbishers often can’t verify the scan rate.

What “New Original (New Surplus)” means. This IS200STAIS2A came from GE’s factory, never mounted. The high-speed circuits are fresh. We break the seal only for testing.

Refurbished risk in plain terms. The scan rate can degrade with age. A refurbished STAIS2A might be slower than spec. I’ve tested refurbished STAIS2A units where the scan rate was 4 ms per channel instead of 2 ms. Failure rate on refurbished high-speed TC modules runs 4× higher than new.

Real cost of a refurbished failure. A fast temperature transient isn’t captured—the turbine control system misses a thermal excursion—turbine trips—lost generation—30,000. The refurbished module saved you 1,000. The failure cost you 30× that.

What we provide as proof. For every IS200STAIS2A we ship: a photo of the OEM packing slip, serial traceability to GE’s records, a full test report that includes scan rate, temperature accuracy on all 16 channels, CJC test, 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 TC 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, TC simulator, reference thermometer, hi-pot tester).

• Scan rate: 32 ms full sweep—under 35 ms.
• Accuracy—J-type, 0 °C: Reading 0.0 °C—within ±0.15%.
• Accuracy—K-type, 100 °C: Reading 100.2 °C—within ±0.15%.
• Accuracy—T-type, 200 °C: Reading 199.8 °C—within ±0.15%.
• Cold-junction compensation: Ambient temperature change—reading compensated.
• Isolation test: 2,500 V RMS—no breakdown. Insulation resistance >100 MΩ.
• Thermal performance: At 60 °C ambient, the module ran at 56 °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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