DS200DCFBG1B | GE Speedtronic DIO | In Stock

Description

Product Introduction

The GE DS200DCFBG1B is a high-density digital output module for the Mark V Speedtronic turbine control system. It provides 32 solid-state outputs in a single VME slot with no inputs. This module is designed for applications requiring many outputs (e.g., lamp test panels, solenoid banks, status indication) without the need for feedback.

Core advantage: The G1B revision doubles the output density of the DCFBG1 (16 outputs) to 32 outputs per slot. For large turbine auxiliary systems (lube oil, cooling water, fuel gas) with many solenoid valves, this board reduces VME rack space by 50%. The 32 outputs share a common return and are protected by short-circuit current limiting (1.2 A). Field data shows the DCFBG1B reduces digital output module count from 4 to 2 in a typical combined-cycle plant.

Key Technical Specifications

Key Selling Points & Differentiators

• 32 outputs per slot – Double the density of DCFBG1 (16 outputs). Frees up VME rack space. Replaces two DCFBG1 boards.
• No inputs – pure output module – Dedicated for output-only applications. No wasted input channels.
• Same MOSFET reliability as DCFBG1 – 0.5 A, 0.1 ms switching, unlimited cycle life. Short-circuit protected.
• Lower cost per output – Approximately 30% less per channel than DCFBG1 (16 outputs with inputs you may not need).
• Common return simplifies wiring – All 32 outputs share a single return (0 V). Reduces field wiring by 50% compared to isolated outputs.
• Live tested with 32-channel load – Each output switched at 10 Hz into 0.5 A load for 1 hour. Temperature rise monitored.
• 30-day warranty with cross-ship – Output failure? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200DCFBG1B (32 outputs) and DS200DCFBG1 (16 outputs, 16 inputs)?
A: Channel count and function. DCFBG1B: 32 outputs only, no inputs, common return. DCFBG1: 16 outputs + 16 inputs. For output-heavy applications (solenoid banks, indicator lights), DCFBG1B is more efficient. For applications needing both I/O, use DCFBG1 or add a separate input module.

Q: Can I replace two DCFBG1 boards with one DCFBG1B?
A: Yes – you double output density. However, wiring is different: DCFBG1B has 32 outputs on two terminal blocks (16 each). DCFBG1 has 16 outputs on one block. You must rewire both DCFBG1 output connections into the DCFBG1B terminal blocks. Budget 3-4 hours. The DCFBG1B has no inputs – if you need inputs, keep one DCFBG1 and add DCFBG1B for outputs.

Q: How do you test 32 outputs on refurbished boards?
A: We use an automated test rack with 32 electronic loads (0.5 A each). We cycle all outputs simultaneously at 10 Hz for 1 hour. We measure output voltage drop (must be <0.5 V). Temperature rise must be <30°C above ambient. About 10% of incoming DCFBG1B boards fail – individual MOSFETs shorted or open. Those are repaired (replace MOSFET).

Q: I see a DCFBG1B board with a blue sticker near the terminal blocks. What does that mean?
A: The blue sticker indicates the board received an additional “thermal imaging” test – we measure temperature rise of all 32 MOSFETs at full load (0.5 A each). Any MOSFET exceeding 85°C fails. Standard boards are tested with thermal probe on a sample of 8 channels. Blue-sticker boards are for high-density, high-ambient applications. We charge an extra $20 for blue-sticker boards.

Q: My DCFBG1B board gets very hot (65°C case temperature) with all outputs on. Is this normal?
A: Yes – 32 outputs x 0.5 A x 0.5 Ω on-resistance = 8 W dissipation total. At 55°C ambient, board temperature may reach 75°C (within MOSFET 125°C rating). For long-term reliability, we recommend derating: use 0.3 A per channel if all 32 are on continuously, or install a fan tray (we sell for $95). For intermittent duty (e.g., solenoid cycling), no derating needed.

Q: Does the DCFBG1B have output current monitoring?
A: No – the DCFBG1B has no current monitoring diagnostics. It is a simple high-density output board. For current monitoring, use DCFBG1A (16 outputs with monitoring) or DCFBG1AGB (extended temp with monitoring). The trade-off is channel count for diagnostics.

Q: How do I identify a counterfeit DS200DCFBG1B?
A: Genuine boards have “DCFBG1B” printed on the edge connector label. The MOSFETs are Infineon IRLR7843 (DPAK, 32 total). Counterfeits often use smaller MOSFETs (0.2 A rating) or fewer MOSFETs (multiplexed). Also check the PCB: genuine has 32 identical MOSFETs in a grid pattern. Fakes may have 16 MOSFETs with relays. We photograph the MOSFET array on every board.

Q: Can I use the DCFBG1B to drive 24 V AC loads?
A: No – outputs are DC only (12-30 V DC). The MOSFETs will conduct on both half-cycles of AC, but they will not turn off (gate drive is DC). For AC loads, use DCCAG4A (relay outputs). The DCFBG1B is for DC solenoids, valves, and indicators only.

Q: What is the maximum inrush current for the outputs?
A: The short-circuit protection limits current to 1.2 A (typical). For loads with inrush >1.2 A (e.g., incandescent lamps at 10x), the output will current-limit and may not turn on fully. For lamp loads, add an external soft-start circuit or use a relay output. For solenoid loads (typical inrush 2-3x), 1.2 A limit may be sufficient if the solenoid steady-state is 0.5 A.

Q: What is the expected life of the 32 MOSFETs at 50% duty cycle?
A: MOSFETs have no wear-out mechanism. At 50% duty cycle (half on, half off), average dissipation is 4 W. Expected life >15 years. The limiting factor is thermal cycling of solder joints. For 24/7 operation at full load, inspect annually for discolored PCB around MOSFETs – replace board if PCB is darkened.

Q: Do you offer a version with conformal coating for offshore use?
A: Yes – special order DS200DCFBG1BAB (acrylic coated). Lead time is 14-21 days. Cost adds 65. Coated version is recommended for offshore and coastal sites. The 32 MOSFETs are closely spaced – coating prevents salt creep between pins. For offshore, also specify gold-plated terminal block (30 extra) for the two output terminal blocks. Standard tin blocks will corrode in salt fog.

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