DS200SDCIG1ABA | GE DS200 Galvanic Isolated Servo I/O In Stock

Description

Product Core Brief

• Model: DS200SDCIG1ABA
• Brand: General Electric (GE)
• Series: Mark V DS200
• Core Function: Fully isolated servo interface board
• Product Type: Isolated Servo Interface (4 channels)
• Key Specs: 4 isolated outputs | 8 isolated feedback inputs | 2500 VAC isolation | Removable terminals
• Condition: New Original.

Product Introduction

The DS200SDCIG1ABA is a fully isolated servo interface and signal conditioning board for GE’s Mark V DS200 series, used in Speedtronic turbine control systems. It provides galvanic isolation between each servo channel, between channels and the backplane, and between feedback input pairs—the highest isolation rating in the interface board family.

The “ABA” suffix indicates a fully isolated variant. Standard SDCIG1 boards have common isolated ground for all channels (500 VAC channel-to-channel). The ABA revision provides 2500 VAC isolation between each channel, between channels and backplane, and between feedback input pairs. It is required for applications where multiple servo valves operate at different ground potentials, or where a fault on one valve must not affect others.

Key Technical Specifications

Key Selling Points & Differentiators

• Complete galvanic isolation per channel – Each of the 4 servo outputs and 8 feedback inputs has its own isolated power domain. Channel 1 can float at +250 VDC while Channel 2 is grounded. No cross-channel fault propagation.
• 2500 VAC field-to-backplane isolation – Protects Mark V backplane and CPU from field-side transients and ground loops.
• Isolated 4–20 mA loop power per channel – Each feedback input pair supplies its own isolated 24 VDC for 2-wire transmitters. A short on Channel 1 feedback does not affect Channel 2.
• High common-mode voltage rating (±250 VDC) – Install on valves with floating ground references or long cable runs with induced voltages.
• Low isolation capacitance (<100 pF) – Reduces high-frequency noise coupling between channels.
• Enhanced ESD protection (±25 kV) – Highest rating in the interface family.
• QC includes 3000 VAC isolation test on all domain combinations – 4 outputs, 4 feedback pairs, backplane: 9 domains, 36 isolation tests.
• 2-year warranty – Covers all isolated domains.

Frequently Asked Questions (FAQ)

Q: What is the difference between SDCIG1A (standard) and SDCIG1ABA (isolated)?

Q: Can I replace a standard SDCIG1A with an ABA without changing my wiring?
A: Yes—electrically and functionally compatible. Same pinout, same terminal assignments. However, if your existing wiring has Channel 1 and Channel 2 grounds tied together externally, separate them to benefit from isolation. The ABA will still work (isolation not damaged by external grounding), but you lose isolation benefit.

Q: When do I need full channel-to-channel isolation?
A: Three scenarios: (1) valves at different ground potentials, (2) fault containment requirements (a fault on one valve must not affect others), (3) high common-mode voltage on long cable runs (>100 V induced).

Q: What is the isolation capacitance between channels?
A: <100 pF. Standard SDCIG1A is 200 pF. Lower capacitance means less high-frequency noise coupling between channels.

Q: What QC tests are specific to the ABA revision?
A: All standard tests plus: 3000 VAC isolation (36 domain combinations), common-mode voltage test (±250 VDC), isolation capacitance measurement (<100 pF), cross-channel crosstalk at isolation limit, enhanced ESD test (±25 kV).

Q: What shipping protection?
A: Anti-static bag, ESD foam cradle, hard plastic clamshell case, desiccant pack. Double-wall box with “ISOLATED INSTRUMENT,” “HIGH VALUE,” “FRAGILE” labels. Shock indicator. Gold-plated spare terminal blocks in separate bag. Isolation test report included. Each board ships individually.

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