GE IS200STCIS6A | Mark VIe Standard Current Input Module

Description

Product Introduction

Some process applications need speed—pressure transients, flow oscillations, and fast control loops. The IS200STCIS6A gives you 16 current inputs with a faster scan rate than the standard STCIH6A—2 ms per channel (32 ms full sweep) instead of 5 ms per channel. It’s the high-speed, high-density current input module for the Mark VIe system, designed for applications where fast-responding process signals are critical.

The “STCIS6” designation tells you this is a high-speed 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. The scan rate is 2 ms per channel—significantly faster than the standard 5 ms. The module also has built-in loop diagnostics. All inputs are isolated to 2,500 V.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

The STCIS6A 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 “–STCIS6A” 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 high-speed timer.

• Scan rate test: Measure the time from first channel to last channel—must be <35 ms.
• 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 scan rate, current accuracy on all channels, loop diagnostics, isolation test, and a photo.

Field Replacement Pitfalls

The STCIS6A is a high-speed current input module—installation mistakes are similar to other current input modules.

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 STCIS6A is a passive input—you need an external 24 VDC supply.

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

Scan Rate—2 ms per Channel. The fast scan rate is useful for transients. If you don’t need the speed, the standard STCIH6A is 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 STCIS6A has high-speed input circuits—refurbishers often can’t verify the scan rate.

What “New Original (New Surplus)” means. This IS200STCIS6A 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 STCIS6A might be slower than spec. I’ve tested refurbished STCIS6A units where the scan rate was 4 ms per channel instead of 2 ms. Failure rate on refurbished high-speed current input modules runs 4× higher than new.

Real cost of a refurbished failure. A fast process transient isn’t captured—the turbine control system misses a pressure 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 IS200STCIS6A 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 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-speed 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).

• Scan rate: 33 ms full sweep—under 35 ms.
• 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 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.

MOTOROLA VME172PA652SE
ABB 5SHX0660F0002 PLC
GE IC697CPM790
A-B 1326AB-B730E-21-K7 PLC