DS200ADPAG1ABB | GE Speedtronic Module | In Stock

Description

Product Introduction

The GE DS200ADPAG1ABB is a programmable gain analog input module for the Mark V Speedtronic turbine control system. It accepts low-level signals from strain gauges, load cells, and bridge sensors. This module adds acrylic conformal coating to the ADPAG1 platform for protection against humidity and airborne contaminants.

Core advantage: The ABB suffix applies acrylic conformal coating (Humiseal 1B31) to the entire PCB. This prevents moisture absorption and dendritic growth between the high-impedance (100 MΩ) input traces. Uncoated ADPAG1 boards in coastal or paper mill environments develop leakage currents between input channels after 12-18 months, causing false strain readings. Coated boards show no leakage after 5+ years. Field data from offshore platforms shows coated ADPAG1 boards have 90% lower failure rate than uncoated.

Key Technical Specifications

Key Selling Points & Differentiators

• Acrylic coating stops leakage current – High-impedance (100 MΩ) inputs are sensitive to moisture. Uncoated boards develop 100 pA leakage in humid environments, causing 10 mV offset at gain=1,000. Coated boards stay below 1 pA.
• Coastal and paper mill rated – Designed for offshore platforms, coastal power plants, and pulp/paper mills. The acrylic coating resists salt fog and sulfur compounds.
• Same programmable gain and excitation – 1 to 1,000 gain range. Onboard 5 V/10 V excitation for bridge sensors. No performance compromise from coating.
• No auto-zero (unlike ADPAG1A) – This is the coated version of standard ADPAG1, not the auto-zero version. For auto-zero with coating, order ADPAG1A with field-applied coating (special order).
• UV-verified coating integrity – Acrylic coating fluoresces blue-green under UV light. We inspect every board for pinholes and edge coverage.
• 30-day warranty with cross-ship – Coating defect or input leakage? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200ADPAG1 and DS200ADPAG1ABB?
A: Conformal coating only. ADPAG1ABB has acrylic coating (0.05 mm) over all components. ADPAG1 is uncoated. Electrical specifications are identical. The ABB suffix is for humid or corrosive environments. For clean, climate-controlled control rooms, ADPAG1 is sufficient. For coastal, offshore, or chemical plants, buy ABB.

Q: Can I apply conformal coating to my existing ADPAG1 board?
A: We do not recommend field application. Acrylic coating requires precise thickness (0.05 mm) and must avoid the VME edge connector and terminal block pins. Field-applied coating is often too thick or too thin, and typically misses the underside of components. We have seen field-coated boards with trapped moisture under the coating – worse than no coating. Send us your board for professional coating ($65 per board). We strip, clean, coat, and cure.

Q: How do you test the coating integrity on refurbished ABB boards?
A: Three tests. First, UV inspection at 365 nm – coating must fluoresce evenly. Dark spots indicate missing coating. Second, insulation resistance test: 500 V DC between adjacent input terminals. Uncoated boards measure 10-100 MΩ in humid air. Coated ABB boards must measure >100 GΩ. Third, we place the board in a humidity chamber at 95% RH for 24 hours, then re-test leakage current. Any board showing >10 pA leakage fails. About 8% of incoming ABB boards fail the humidity test – the coating has pinholes. Those are stripped and re-coated.

Q: I see an ABB board with a white dot near the edge connector. What does that mean?
A: The white dot indicates the board received an additional “salt fog” test per MIL-STD-810 (48 hours exposure). Boards that pass show no corrosion on exposed metal (terminal block screws, edge connector fingers). Standard ABB boards are not salt fog tested. We charge an extra $30 for white-dot boards. For offshore platforms or marine environments, we recommend salt fog tested boards.

Q: Does the conformal coating affect the auto-zero feature (not present on ABB, but for future reference)?
A: On boards with auto-zero (ADPAG1A), the coating does not interfere with relay operation. The relays are sealed components. However, if coating gets inside the relay during application, the relay may stick. We mask relays during coating. Our refurbished ABB boards have masked relays – the relay tops are uncoated. If you see coating on relay tops, reject the board.

Q: Can I use the ABB board in a Class I Div 2 hazardous location?
A: The acrylic coating does not change the hazardous location rating. The base ADPAG1 is not UL listed for Class I Div 2. For hazardous locations, you need external encapsulation (potting) or a factory-certified board. GE produced a limited run of ADPAG1ABB-EX for offshore platforms. Those boards have a yellow EX label. We occasionally have EX boards in stock – contact us for availability.

Q: My ABB board reads fine but has visible white residue under the coating. Is this normal?
A: No – white residue indicates moisture trapped under the coating during curing. This usually happens when the board was not properly dried before coating application. The residue can cause leakage current. Return the board for replacement under warranty. We will strip and re-coat at no charge.

Q: How do I identify a counterfeit DS200ADPAG1ABB?
A: Genuine boards have “ADPAG1ABB” printed on the edge connector label. Under UV light (365 nm), the coating must fluoresce blue-green. Counterfeit boards often use polyurethane coating (no fluorescence) or no coating at all with a fake “ABB” label. Also check the gain resistors: genuine uses 0.1% tolerance Vishay resistors (blue body). Fakes use 1% brown resistors. We UV-inspect and photograph every board.

Q: Can the coating be removed for repairs?
A: Yes – acrylic coating can be removed with specialized solvents (Chemtronics AC-70). We offer repair services for coated boards at 225 (vs 175 for uncoated). The extra cost covers coating removal and re-application. For field repairs, do not attempt – the solvents are toxic and will damage the terminal block. Send the board to us.

Q: Does the coating affect heat dissipation?
A: Minimal. The acrylic coating is 0.05 mm thick and has thermal conductivity similar to air. Surface temperature of the ADPAG1ABB is 2-3°C higher than an uncoated board at full load (505 mA). This is within the 0-55°C operating range. For high-ambient applications (55°C cabinet temperature), the coated board will run at 58°C – still acceptable. For cabinets above 55°C, use a different board or add cabinet cooling.

Q: What is the shelf life of coated boards in storage?
A: Acrylic coating does not degrade in storage if kept in anti-static bags at 10-40°C. We have shipped boards stored for 8 years with no coating issues. However, the terminal block screws may oxidize. We include new terminal blocks with each order – the original block may have corroded screws. Replace the terminal block before installation.

Q: Do you offer the ADPAG1A (auto-zero) with conformal coating?
A: Yes – special order ADPAG1AACC (silicone coating) or ADPAG1AABB (acrylic coating). Lead time is 14-21 days. The auto-zero relays are sensitive to coating – we mask them carefully. Cost adds 65 for acrylic, 95 for silicone. We do not stock coated auto-zero boards – order in advance. For immediate needs, buy standard ADPAG1ABB and add external auto-zero via software (we provide the routine).

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