GE DS3800NISA1C1D

Key Technical Parameters

Advantages and Distinctive Features

• Adaptive Temperature Averaging (Revision C + 1D): Smooths rapid temperature fluctuations, reducing unnecessary fan cycling by up to 30%—extending fan bearing life and reducing acoustic noise.

• 24-Bit Ultra-High Precision ADC: ±0.5°C accuracy for precise thermal management.

• Onboard Temperature Threshold Logic: Autonomous ON/OFF fan control during backplane communication loss.

• 3A Solid-State Outputs: Supports larger DC fans or multiple fans in parallel.

• Extended Environmental Tolerance: -40°C to +75°C with 5g vibration resistance.

• Fan-Dense Design: 8 outputs with only 4 temperature inputs—optimized for single-zone cooling.

• Silent, Maintenance-Free Operation: Unlimited switching cycles with no contact wear.

• 200-Event Fault Log: Stores temperature alarms and fallback events.

Typical Application Fields

• Offshore Oil & Gas Platforms: Extreme environments with reduced fan cycling.

• Desert Power Plants: 75°C upper limit with adaptive smoothing.

• Arctic Compressor Stations: -40°C low-temperature tolerance.

• High-Cycle Applications: Adaptive averaging reduces switching frequency.

• Remote Unstaffed Stations: Autonomous fallback with reduced fan wear.

Comparison with Related Models

Selection Recommendations

• Choose the DS3800NISA1C1D if:

  • Your fans are DC-powered (24V or 48V) with current draw ≤3A.

  • Your cabinet uses 4 temperature sensors for 8 fan outputs.

  • You want ultra-precise temperature monitoring (±0.5°C).

  • You want adaptive averaging to reduce fan cycling and extend fan life.

  • You need autonomous fallback cooling during CPU communication loss.

  • Your installation is in extreme environments (-40°C to +75°C) with high vibration.

  • You do not require tachometer feedback.

• Choose the DS3800NFMC1E1C if: You need the same features with 8 thermocouple inputs instead of 4.

• Choose the DS3800NISA1C1C if: You need the same features but without adaptive averaging.

Critical Precautions

• ESD Protection: Always wear a grounded wrist strap. Static damage to the 24-bit ADC degrades accuracy.

• DC Polarity: Solid-state outputs are DC-only and polarity-sensitive. Reverse polarity destroys the output MOSFET.

• Voltage Limit: Do not exceed 48VDC—AC voltages cause catastrophic failure.

• Current Derating: At 75°C, derate to 2.2A per output.

• Missing T/C Channels: Only 4 thermocouple inputs (channels 1–4). Channels 5–8 are physically absent.

• No Tachometer Inputs: Do not connect speed sensors.

• Adaptive Averaging Tuning: The averaging window (default 10 seconds) can be adjusted via Mark V software.

• Fallback Configuration: Thresholds must be configured via Mark V software. If not configured, defaults to 100% fan speed.

• No Hot-Swap: Always depower the rack before insertion/removal.

• Slot Assignment: Install in slots 8–10 (auxiliary I/O).

• CPU Dependency: If backplane communication is lost, the board enters autonomous fallback—adaptive averaging disabled in fallback mode.

• Firmware Compatibility: Revision C firmware requires Mark V CPU firmware v5.0 or higher for full 24-bit ADC, autonomous logic, and adaptive averaging. For v4.x, reverts to 16-bit mode with no advanced features.

• Power Supply: Draws 3.5A on +5V rail—verify sufficient capacity.