GE DS3800XPER

Key Parameters

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

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

• Redundancy: Dual input feeds with automatic failover (<1ms switchover)

• Input Voltage: 120/240V AC or 125/250V DC (dual inputs, independently fused)

• Output Accuracy: ±0.05% regulation

• Ripple/Noise: <3 mV peak-to-peak

• Current Capacity: High (sufficient for multiple sensors; consult board marking)

• Isolation: 2500V RMS input-to-output (per input)

• Diagnostics: LED status indicators for each output, redundancy status indicators (primary/backup active), over-voltage/over-current protection, thermal shutdown, output voltage monitoring, input fault detection

• Temp Range: –40°C to +85°C (extended)

• Physical: 6U VME single-slot board

• Key Features: Dual redundant inputs, automatic failover, high current capacity, ultra-low noise, extended temp range, comprehensive diagnostics, input fault detection

Advantages

• Built-in redundancy – the DS3800XPER features dual input feeds with automatic failover (<1ms), ensuring uninterrupted power to sensors even if one input supply fails.

• Ultra-low noise – <3 mV ripple provides exceptionally clean power for sensitive analog measurements.

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

• Redundancy status visibility – LED indicators show which input is active, simplifying troubleshooting of power supply issues.

• Input fault detection – the General Electric DS3800XPER detects input failures and logs them for diagnostic purposes.

• Extended temperature range – operates from –40°C to +85°C for harsh environments.

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

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

Applications

• Critical turbine protection systems – provides redundant excitation for overspeed protection speed pickups, where power loss is not acceptable.

• High-availability installations – used in critical power generation applications where sensor power redundancy is required.

• Offshore platforms – redundant inputs accommodate dual power sources common in offshore installations.

• Vibration monitoring – supplies low-noise power to proximity probes for continuous shaft monitoring.

• LVDT excitation – powers LVDTs for critical valve position feedback (fuel valves, steam valves).

• Retrofits – the DS3800XPER replaces standard power boards in systems requiring redundancy upgrades.

vs Competitors & Previous Variants

Selection Tips

• Redundancy required – choose the DS3800XPER for critical applications where sensor power failure cannot be tolerated (e.g., overspeed protection, vibration monitoring on critical machines).

• Dual power sources – the General Electric DS3800XPER requires two independent input power sources. Ensure your plant has redundant power feeds available.

• High-precision sensors – the ultra-low noise and tight regulation make it suitable for the most sensitive analog measurements.

• Sensor compatibility – verify that the excitation voltage and current requirements of your sensors match the DS3800XPER outputs.

• Power loading – calculate the total current draw of all connected sensors and ensure it does not exceed the DS3800XPER total power rating.

• Spare strategy – keep one DS3800XPER per 5–8 installed units, especially in critical applications where redundant power is specified.

• Calibration – periodically verify output voltages under load using a precision multimeter to ensure the ±0.05% accuracy.

Critical Precautions

• Dual input wiring – ensure both inputs of the DS3800XPER are connected to independent power sources. If both inputs are fed from the same source, redundancy is defeated.

• Input fusing – each input of the DS3800XPER has its own fuse. Use only the specified fuse rating (consult board marking) and keep spare fuses on hand.

• Failover testing – periodically test the automatic failover function by switching off one input while monitoring the DS3800XPER outputs to verify seamless transition.

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

• Overloading – do not exceed the DS3800XPER current rating for any output. Overloading can cause voltage drop, overheating, or shutdown.

• Wiring polarity – ensure correct polarity when connecting sensors to the General Electric DS3800XPER 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 DS3800XPER end to prevent ground loops.

• Ground loops – use single-point grounding for all sensors connected to the DS3800XPER to avoid ground-loop noise.

• Thermal considerations – ensure adequate cabinet cooling (>200 CFM); the DS3800XPER can generate significant heat under load.

• Redundancy status monitoring – connect the redundancy status outputs (if available) to the Mark IV system for remote monitoring of input health.

• Hot-swap – never insert or remove the DS3800XPER 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 DS3800XPER; power components are ESD-sensitive.

• Storage – store spare DS3800XPER boards in anti-static bags in a dry, temperature-controlled environment.