DS200DMCBG1ABA | GE Speedtronic Module | In Stock

Description

Product Introduction

The GE DS200DMCBG1ABA is an analog combination I/O module for the Mark V Speedtronic turbine control system. It combines per-channel isolated outputs with acrylic conformal coating for protection against humidity and salt fog. This module is designed for coastal and offshore applications requiring ground loop elimination.

Core advantage: The ABA revision protects the isolated output stages from corrosion while maintaining 1,500 V isolation. Uncoated DMCBG1 boards in offshore environments develop leakage across output isolation barriers (reducing effective isolation to <500 V). Coated boards maintain full isolation. Field data from offshore platforms shows ABA boards have 90% lower isolation failure rate than uncoated.

Key Technical Specifications

Key Selling Points & Differentiators

• Isolated outputs + conformal coating – Protects isolation barriers from moisture. Uncoated boards lose isolation in high humidity.
• Acrylic coating for coastal/offshore – Prevents salt creep across output transformer pins.
• Same 4 in / 4 out with isolation – No reduction in channel count or isolation rating.
• UV-verified coating – Acrylic fluoresces blue-green. Inspected for pinholes around transformers.
• Salt fog tested (optional) – Red dot boards receive 96-hour ASTM B117 test.
• Live tested with isolation after humidity soak – 1,500 V applied after 95% RH exposure for 24 hours.
• 30-day warranty with cross-ship – Coating defect or isolation failure? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200DMCBG1 (uncoated, isolated outputs) and DS200DMCBG1ABA (coated, isolated outputs)?
A: Conformal coating. DMCBG1: no coating (indoor, clean). DMCBG1ABA: acrylic coating for humidity and salt fog. Electrical specifications (isolation, accuracy) are identical. For offshore platforms and coastal sites, use ABA. For climate-controlled rooms, uncoated is sufficient.

Q: Does the conformal coating affect the isolation voltage rating?
A: No – coating prevents surface leakage, which actually helps maintain isolation in humid environments. The 1,500 V rating is unchanged. Coating does not penetrate the isolation barrier; it only protects the PCB surface.

Q: How do you test the coating and isolation on refurbished ABA boards?
A: We apply 1,500 V AC for 1 second between outputs and backplane after the board has been in a humidity chamber at 95% RH for 24 hours. Leakage current must stay <5 mA. Uncoated boards often fail this test. About 10% of incoming ABA boards fail – coating pinholes allow moisture to the isolation barrier. Those are stripped and re-coated.

Q: I see an ABA board with a red dot near the output transformers. What does that mean?
A: The red dot indicates the board received an additional “salt fog” test per ASTM B117 for 96 hours. The board must maintain 1,500 V isolation after salt fog exposure. Standard ABA boards are not salt fog tested. We charge an extra $30 for red-dot boards. For offshore platforms, we recommend red-dot.

Q: My ABA board fails isolation test (output to backplane shorts at 500 V). Is the coating responsible?
A: No – coating does not cause isolation failure. The isolation transformer may have been damaged by over-voltage or the DC-DC converter failed. Repair is not economical (isolation transformers are custom). Replace the board. For future, add external surge protection on outputs.

Q: How do I identify a counterfeit DS200DMCBG1ABA?
A: Genuine boards have “DMCBG1ABA” printed on the edge connector label. Under UV light, the coating fluoresces blue-green. Counterfeits often use polyurethane (no fluorescence) or no coating. Also check the output transformers: genuine has 4 yellow toroids. Fakes may have fewer or black cubes. We UV-inspect and photograph every board.

Q: Can I field-coat my existing DMCBG1 board to make it an ABA?
A: We strongly advise against it. Coating over the isolation transformers may trap moisture and reduce isolation. Send us your board for professional coating ($65). We mask the transformers and coat only the PCB.

Q: Does the coating affect the 4-20 mA output accuracy?
A: No – coating is non-conductive and does not affect current loop performance. Accuracy remains ±0.2%.

Q: What is the shelf life of ABA boards in coastal storage?
A: Acrylic coating does not degrade in storage if kept in anti-static bags with desiccant at 10-40°C. For long-term storage in coastal areas, keep in sealed bag with silica gel. We include desiccant with each order.

Q: Do you offer a version with higher precision (18-bit inputs, 16-bit outputs) and coating?
A: Yes – special order DS200DMCBG1ABA-HP (high precision, coated, isolated outputs). Lead time is 21-28 days. Cost adds $85. For precision offshore applications (e.g., chemical injection on platforms), this combination is recommended. Contact us for details.

ACS510-01-09A4-4
ACS510-01-012A-4
ABB ACS510-01-017A-4
ACS510-01-025A-4
ACS510-01-031A-4 ABB