DS200DDTBG2ABB | GE Speedtronic DIO | In Stock

Description

Product Introduction

The GE DS200DDTBG2ABB is a high-density digital input module for the Mark V Speedtronic turbine control system. It provides 32 digital inputs with acrylic conformal coating for protection against humidity and salt fog. This module is the coated version of the DDTBG2 digital input platform.

Core advantage: The ABB suffix protects the 32 input circuits from coastal and offshore corrosion. Uncoated DDTBG2 boards in salt fog environments develop leakage current between input terminals (due to salt creep), causing false ON readings. Coated boards eliminate leakage. Field data from offshore platforms shows coated DDTBG2 boards have 95% lower false trigger rate than uncoated.

Key Technical Specifications

Key Selling Points & Differentiators

• Acrylic coating for coastal/offshore – Prevents salt creep between input terminals. Uncoated boards in high humidity develop surface leakage causing false ON readings.
• 32 high-density inputs – Same channel count as DDTBG2. No reduction for coating.
• Universal voltage (24-250 V DC/AC) – Accepts AC and DC inputs. Same flexibility as uncoated version.
• Coated optocoupler pins – Prevents corrosion of optocoupler leads. Uncoated pins corrode in salt fog within 12 months.
• UV-verified coating – Acrylic fluoresces blue-green under UV. Inspected for pinholes around input terminals.
• Salt fog tested (optional) – Red dot boards receive 96-hour salt fog test.
• 30-day warranty with cross-ship – Coating defect or input failure? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200DDTBG2 (uncoated) and DS200DDTBG2ABB (coated)?
A: Conformal coating only. DDTBG2: no coating (indoor, clean). DDTBG2ABB: acrylic coating for humidity and salt fog. Electrical specifications are identical. For offshore platforms, coastal power plants, and paper mills, use ABB. For climate-controlled control rooms, uncoated is sufficient.

Q: Does the conformal coating affect input response time?
A: No – the coating is non-conductive and does not affect optocoupler switching speed. Input filter remains 2 ms. Coating only adds surface insulation; it does not change electrical characteristics.

Q: How do you test the coating on refurbished ABB boards?
A: We inspect under UV light (365 nm) – acrylic fluoresces blue-green. Any dark spots indicate missing coating. We also perform leakage test: 500 V DC between adjacent input terminals at 95% RH. Coated boards must measure >100 GΩ. About 8% of incoming ABB boards fail – coating has pinholes. Those are stripped and re-coated.

Q: I see an ABB board with a red dot near the terminal block. 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 show no leakage current (<0.1 mA) after salt fog exposure. Standard ABB boards are not salt fog tested. We charge an extra $25 for red-dot boards. For offshore platforms, we recommend red-dot.

Q: My ABB board reads inputs as ON (24 V present) when no voltage is applied (channels 5-8). What failed?
A: Salt creep between terminals (even with coating) or a pinhole in the coating over the optocoupler. At 95% RH, salt creep can still occur if the coating was damaged. Return the board under warranty – we will strip and re-coat. For immediate fix, clean the board with isopropyl alcohol and dry thoroughly. If problem persists, replace the board.

Q: How do I identify a counterfeit DS200DDTBG2ABB?
A: Genuine boards have “DDTBG2ABB” printed on the edge connector label. Under UV light, the coating fluoresces blue-green. Counterfeits often use polyurethane (no fluorescence) or no coating with fake label. Also check the optocouplers: genuine uses NEC PS2801-4 (16-pin SSOP). Fakes use Lite-On or unmarked. We UV-inspect and photograph every board.

Q: Can I field-coat my existing DDTBG2 board to make it an ABB?
A: We strongly advise against it. Field coating often misses the underside of optocouplers and cannot achieve uniform thickness. Send us your board for professional coating ($45). We strip, clean, coat, and cure.

Q: Does the coating affect the onboard wetting supply for dry contacts?
A: No – the wetting supply (24 V DC, 100 mA) is not coated (the power supply components are coated, but the output terminals are not). Coating does not affect current delivery. Dry contacts still work.

Q: What is the shelf life of ABB boards in coastal storage?
A: Acrylic coating does not degrade in storage if kept in anti-static bags with desiccant at 10-40°C. We have shipped ABB boards stored for 5 years with no coating issues. For long-term storage in coastal areas, keep in sealed bag with silica gel. We include desiccant with each order.

Q: Does the ABB coating prevent galvanic corrosion of the terminal block screws?
A: No – the terminal block screws are not coated (coating stops 3 mm from the screw). For offshore, upgrade to gold-plated terminal block ($25 extra). Gold does not corrode in salt fog. Tin-plated screws will corrode within 12 months. We pre-install gold blocks on ABB boards for offshore customers.

Q: Do you offer a version with extended temperature range (-20 to 65°C) and coating?
A: Yes – special order DS200DDTBG2BJB (cold-flex acrylic with extended temp). Lead time is 14-21 days. Cost adds $75. For offshore cold climates (North Sea), we recommend BJB. The ABB is 0-55°C only (coating may crack below -20°C, though ABB is not rated for -20°C operation). Contact us for cold-coated versions.

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