GE DS3828BH9GR

Parameters

Advantages & Features

• Highest Density + Ruggedized – The GE DS3828BH9GR uniquely combines 9-channel density with conformal coating, 5g vibration rating, and -40°C to +75°C range — features not available together in competing products.

• Cost-Effective per Channel – Lowest cost per point in the ruggedized Mark VIe output family, ideal for high-I/O-count harsh-environment applications.

• Programmable Dither – Independent dither per channel reduces valve stiction and hysteresis for up to 9 actuators simultaneously.

• DNV GL Marine Approved – Certified for offshore and shipboard use, simplifying project certification.

• Diagnostics – Continuous current monitoring (±2%) detects open-wire and partial shorts, with fault reporting within 50ms.

Application Cases

• Offshore Platform Auxiliaries – A single GE DS3828BH9GR controls 9 valves (IGV, blow-off, fuel gas preheater, cooling water, etc.) in a North Sea gas turbine compressor package, with conformal coating resisting salt spray and 5g vibration ensuring reliability during deck operations.

• Marine Propulsion Systems – In naval frigates, the GE DS3828BH9GR drives 9 pneumatic and hydraulic actuators in the gas turbine propulsion control system, with shock resistance (30g) meeting naval warfare requirements.

• Desert Combined-Cycle Plants – Operates at 75°C ambient in Middle East installations without derating, controlling HRSG spray valves and cooling water systems where standard modules fail.

• Mobile Turbine Generator Sets – Trailer-mounted emergency power units use the GE DS3828BH9GR for vibration-resistant control of air filters, cooling fans, and fuel valves during transport over rough terrain.

Competitor Comparison

The GE DS3828BH9GR is the only module offering 9 channels with ruggedization and dither in one slot. While ABB provides SIL 2 marine, it lacks dither and has lower channel density.

Selection Suggestions

• Choose the GE DS3828BH9GR when you need 7–9 outputs in harsh environments (offshore, marine, desert, mobile) and 12-bit resolution is acceptable. It is the most cost-effective ruggedized high-density solution.

• If 14-bit resolution or faster update (500Hz) is required, select the DS3828BH5AR (5 channels) instead — the GE DS3828BH9GR is limited to 12-bit and 250Hz.

• Verify actuator load is ≤500Ω. For loads >500Ω, use the DS3828BH5AR (supports 750Ω) or the DS3828BH3AH (supports 2kΩ).

• For SIL 2 applications, do not use the GE DS3828BH9GR — select the DS3828BH3A or DS3828BH3AH instead.

• Pair with TB500-9M terminal block (marine-certified with stainless steel hardware).

Precautions

• Load Limitation – Maximum load 500Ω at 24V. For loads >500Ω, increase supply to 28V (within tolerance) to reach ~620Ω max.

• Thermal Derating – At 75°C ambient, reduce output current to 15mA per channel if all 9 channels are active. Provide adequate cabinet ventilation.

• Resolution – 12-bit gives ~5µA/bit steps. Not suitable for precision positioning requiring <1% valve resolution.

• Common Ground – All outputs share common negative. Use external loop isolators for isolated transmitters.

• Dither Staggering – Stagger frequencies by at least 20Hz across 9 channels to avoid beat frequencies.

• Power Supply – Total current ≈ 400mA + 9 x 22mA = 600mA. Use supply rated ≥800mA per module.

• Output Back-Feed – Not protected against external voltage. Install series fuses (25mA) on each output if external supplies share conduit.

• Coating Inspection – Inspect for coating cracks after handling; repair with GE-approved acrylic spray (282A4761P001).

• Calibration – Valid for 24 months; recalibrate at authorized GE service center only