GE DS3800XPEX

Key Parameters

• Power Outputs: Multiple regulated DC outputs (+5V, ±15V, +24V, and additional auxiliary outputs)

• Excitation Outputs: Adjustable excitation for transducers (e.g., 3V, 5V, 10V DC, or 4–20mA loop power)

• Input Voltage: 120/240V AC or 125/250V DC (depending on system configuration)

• Output Accuracy: ±0.05% regulation

• Ripple/Noise: <5 mV peak-to-peak (acceptable for high-power output)

• Current Capacity: Significantly higher than standard boards (consult board marking; supports multiple high-current sensors)

• Isolation: 2500V RMS input-to-output

• Diagnostics: LED status indicators for each output, over-voltage/over-current protection, thermal shutdown, output voltage monitoring, thermal monitoring

• Thermal Management: Enhanced heatsinking and airflow design

• Temp Range: –30°C to +70°C

• Physical: 6U VME single-slot board (with enhanced heatsink)

• Key Features: High current capacity, additional output channels, enhanced thermal management, ultra-low noise, comprehensive protection

Advantages

• High current capacity – the DS3800XPEX can supply significantly more current than standard boards, supporting multiple sensors, long cable runs, or high-power transducers.

• Additional output channels – provides more auxiliary outputs than standard boards, reducing the need for external power supplies.

• Enhanced thermal management – improved heatsinking and thermal design ensure reliable operation under high-load conditions.

• Superior regulation – ±0.05% output regulation ensures stable excitation even under varying load conditions.

• Comprehensive protection – over-voltage, over-current, and thermal protection safeguard the General Electric DS3800XPEX and connected field devices.

• Thermal monitoring – alerts the system to overheating conditions, enabling proactive cooling or load reduction.

• Diagnostic visibility – LED indicators and monitoring outputs simplify troubleshooting.

• Drop-in compatible – works with all Mark IV backplanes and processor configurations.

Applications

• Multiple sensor installations – powers numerous speed pickups, proximity probes, and LVDTs from a single board.

• Long cable runs – the high current capacity of the DS3800XPEX compensates for voltage drop in long sensor cables.

• High-power transducers – supplies excitation to transducers requiring higher current than standard boards can provide.

• Large turbine systems – provides power for sensors across multiple turbine sections (gas turbine, steam turbine, generator).

• Offshore and industrial installations – robust design suitable for demanding environments.

• Retrofits – the DS3800XPEX replaces multiple standard power boards with a single high-capacity unit.

vs Competitors & Previous Variants

Selection Tips

• High power / multiple sensors – choose the DS3800XPEX when you need to power many sensors or high-power transducers from a single board.

• Long cable runs – the higher current capacity of the General Electric DS3800XPEX allows compensation for voltage drop in long cables; calculate the required current based on cable length and sensor load.

• Additional outputs – if your system requires more auxiliary voltages than standard boards provide, the DS3800XPEX offers additional outputs.

• Thermal management – ensure adequate cabinet cooling (>250 CFM) for the DS3800XPEX, especially under high-load conditions.

• Sensor compatibility – verify that the excitation voltage and current requirements of your sensors match the DS3800XPEX outputs.

• Power loading – calculate the total current draw of all connected sensors and ensure it does not exceed the DS3800XPEX total power rating.

• Spare strategy – keep one DS3800XPEX per 5–8 installed units, especially in sensor-rich installations.

Critical Precautions

• Power loading – do not exceed the DS3800XPEX total power rating. Overloading can cause voltage drop, overheating, or thermal shutdown.

• Thermal considerations – the DS3800XPEX generates significant heat under high-load conditions. Ensure adequate cabinet cooling and unobstructed airflow over the heatsink.

• Output voltage selection – verify that output voltages are correctly configured before connecting sensors. Incorrect voltage can damage sensors.

• Wiring polarity – ensure correct polarity when connecting sensors to the General Electric DS3800XPEX outputs; reversed polarity can damage sensitive transducers.

• Shielded cabling – use shielded cables for sensor connections to minimize noise pickup. Ground the shield only at the DS3800XPEX end to prevent ground loops.

• Ground loops – use single-point grounding for all sensors connected to the DS3800XPEX to avoid ground-loop noise.

• Cable sizing – for long cable runs, ensure that the cable gauge is sufficient to handle the current without excessive voltage drop; consult the DS3800XPEX technical manual for derating guidelines.

• Thermal monitoring – if thermal monitoring outputs are available, connect them to the Mark IV system for continuous temperature monitoring.

• Hot-swap – never insert or remove the DS3800XPEX while the rack is powered; this can cause voltage spikes and damage connected sensors.

• ESD handling – always use a grounded wrist strap when handling the DS3800XPEX; power components are ESD-sensitive.

• Storage – store spare DS3800XPEX boards in anti-static bags in a dry, temperature-controlled environment.