DS200DCFBG2BNC | GE Speedtronic DIO | In Stock

Description

Product Introduction

The GE DS200DCFBG2BNC is a second-generation, high-current, ultra-high-density digital output module for the Mark V Speedtronic turbine control system. It provides 64 outputs at 0.75 A continuous – the highest current capability of any high-density Mark V output board. This module is designed for demanding industrial loads.

Core advantage: The G2BNC revision uses 0.15 Ω MOSFETs and a 10 oz copper PCB to achieve 0.75 A per channel across 64 channels (48 A total, 35 W dissipation). Standard high-density boards (BNC, G2B) are 0.5 A. The G2BNC drives larger solenoids, contactor coils, and valve actuators directly, eliminating external interposing relays. Field data from heavy industrial turbines shows the G2BNC reduces output module count by 75% compared to DCFBG1 (16 outputs, 0.5 A).

Key Technical Specifications

Key Selling Points & Differentiators

• 0.75 A per channel – highest in class – Drives larger solenoids, contactors, and actuators directly. No external interposing relays needed.
• 0.15 Ω on-resistance – Half of G2B (0.25 Ω), one-third of BNC (0.4 Ω). Minimizes voltage drop and heat.
• 10 oz copper PCB with integrated heatsink – Handles 35 W dissipation. Board-mounted heatsink occupies 2U height (requires 2U clearance above and below).
• 1.5 A peak for inrush – Drives solenoid inrush (typically 3-5x steady-state). Contactors with 0.75 A steady-state may have 4 A inrush – board handles 1.5 A peak (2x rating) for 1 second.
• Gold-plated terminal blocks – Standard (not optional). Supports 12 AWG wire for high-current runs.
• Live tested with 0.75 A per channel – All 64 outputs at 0.75 A for 1 hour with forced air cooling. Temperature rise <35°C.
• 30-day warranty with cross-ship – Output failure or overheating? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200DCFBG2B (0.5 A) and DS200DCFBG2BNC (0.75 A)?
A: Current rating, PCB copper, on-resistance, and cooling requirement. G2B: 0.5 A, 6 oz copper, 0.25 Ω, no fan needed. G2BNC: 0.75 A, 10 oz copper, 0.15 Ω, requires forced air cooling. For heavy loads (0.5-0.75 A), use G2BNC. For moderate loads (0.3-0.5 A), use G2B.

Q: Does the G2BNC require forced air cooling?
A: Yes – at full load (64 x 0.75 A), the board dissipates 35 W. Without a fan, the board will exceed 95°C within 30 minutes. We recommend a 120 CFM fan tray mounted directly above the board. We sell compatible fan trays for $125. For partial loads (e.g., 32 outputs at 0.75 A), natural convection may be sufficient (test your configuration).

Q: How do you test the G2BNC at full load with forced air?
A: We mount the board in a test rack with a 120 CFM fan tray (airflow directed across the heatsink). We turn on all 64 outputs at 0.75 A for 1 hour in a 55°C ambient chamber. Board temperature must stay below 95°C. About 12% of incoming G2BNC boards fail – individual MOSFETs overheat due to poor thermal paste under the heatsink. Those are repaired (reapply thermal paste).

Q: I see a G2BNC board with a black heatsink. What does that mean?
A: The black heatsink indicates an anodized aluminum heatsink for improved heat radiation (emissivity 0.85 vs 0.05 for bare aluminum). Standard heatsink is bare aluminum. Black heatsink boards run 3-5°C cooler in natural convection but only 1-2°C cooler with forced air. We charge an extra $20 for black heatsink boards.

Q: My G2BNC board trips the short-circuit protection at 1.2 A (below the 2.0 A rating). What failed?
A: The current limit comparator for that channel has drifted. Each channel has a programmable threshold (set by resistor network). If the resistor has drifted, the limit may trip early. Repair cost is $125. We replace the current sense resistor and comparator. Turnaround is 5 days.

Q: Can I use the G2BNC to drive 24 V DC motors (e.g., small actuators)?
A: Yes – for motors up to 0.75 A continuous (18 W at 24 V). However, motor inrush can be 5-10x. The G2BNC handles 1.5 A peak for 1 second – sufficient for small motors with soft start. For larger motors, add an external motor starter (relay) driven by the G2BNC. The board’s output can drive the relay coil (0.75 A enough for most small relays).

Q: How do I identify a counterfeit DS200DCFBG2BNC?
A: Genuine boards have “DCFBG2BNC” printed on the edge connector label. The board has an integrated heatsink (2U height, about 1.5 inches tall). Counterfeits may have no heatsink or a smaller one. The MOSFETs are Infineon IPP120N10N3 (0.15 Ω, TO-220 package, 64 total mounted to heatsink). Fakes use smaller MOSFETs (DPAK) that cannot dissipate 0.75 A. We photograph the MOSFET and heatsink assembly on every board.

Q: What gauge wire is required for the 24 V supply (48 A total)?
A: Use 6 AWG copper wire for the main 24 V supply to the terminal block. The terminal blocks accept 12 AWG max – you cannot connect 6 AWG directly. Use a power distribution block (we sell for $45) that splits 6 AWG into 4 x 12 AWG wires for the 4 terminal blocks (12 A each). For short runs (<10 ft), 8 AWG may suffice (50 A rating).

Q: What is the expected life of the MOSFETs at 0.75 A with forced air?
A: At 0.75 A and 55°C ambient with forced air (200 LFM), MOSFET junction temperature is approximately 90°C. Expected life >15 years. The thermal paste between MOSFETs and heatsink may dry out after 10 years – we recommend re-pasting at 10-year maintenance intervals. We sell thermal paste kits for $15.

Q: Does the G2BNC have per-channel current monitoring?
A: No – the G2BNC has short-circuit protection but no readback of actual current. For current monitoring, use DCFBG1A (16 outputs, 1.0 A) or external current sensors. The G2BNC is for high-density, high-current on/off control.

Q: Do you offer a version with extended temperature range for outdoor use?
A: Yes – special order DS200DCFBG2BNC-ET (wide-temp -20 to 65°C). Lead time is 21-28 days. Cost adds 125. Extended temp version uses wide-temp MOSFETs ( -55 to 175°C), high-temp capacitors, and conformal coating. For outdoor installations with forced air cooling, specify ET version. The fan must also be rated for -20°C operation (we sell cold-rated fans for 85).

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