GE DS3800NHVE1C1C

Key Technical Parameters

Advantages and Distinctive Features

• Hybrid Output Architecture: Combines 8 high-voltage DC relay outputs (250VDC) with 4 low-voltage solid-state outputs (24–48VDC) on a single board.

• Reduced Thermocouple Count (4 channels): Optimized for cabinets where fewer temperature sensors monitor multiple fan zones—reducing hardware cost while maintaining 8 fan outputs.

• Extended Temperature Range: -20°C to +65°C supports moderately harsh environments.

• Improved Cold-Junction Compensation (Revision C): Enhanced temperature measurement stability.

• Enhanced Noise Filtering: Improved ADC input filtering for high-EMI environments.

• 250VDC Relay Capability: Supports high-voltage exhaust fans.

• Solid-State Auxiliary Outputs: Silent, maintenance-free switching for low-voltage fans/alarms.

Typical Application Fields

• Fan-Dense High-Voltage Cabinets: Where 8 fans cool a single zone monitored by only 4 temperature sensors.

• High-Voltage Industrial Fan Systems: 220–250VDC exhaust fans with low-voltage auxiliary controls.

• Railway and Traction Applications: High-voltage DC cooling with 24VDC control circuits.

• Unheated Shelters & Outdoor Enclosures: -20°C to +65°C range.

Comparison with Related Models

Selection Recommendations

• Choose the DS3800NHVE1C1C if:

  • You need 250VDC relay outputs for high-voltage exhaust fans.

  • You also need low-voltage solid-state outputs (24–48VDC) for auxiliary fans or alarms.

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

  • You want enhanced cold-junction compensation and noise filtering.

  • Your installation requires extended temperature range (-20°C to +65°C).

• Choose the DS3800NHVE1C1B if: You need the same features but require 8 thermocouple inputs.

• Choose the DS3800NHVE1B1B if: You need 8 thermocouple inputs and extended temperature range but do not require enhanced CJC or noise filtering.

Critical Precautions

• ESD Protection: Always wear a grounded wrist strap.

• Extreme High-Voltage Hazard: Relay outputs switch 250VDC—lethal voltage present on terminals. Observe all high-voltage safety procedures. Use wiring rated for ≥250VDC.

• Missing Thermocouple Channels: The DS3800NHVE1C1C has only 4 thermocouple inputs (channels 1–4). Channels 5–8 are physically absent and will not function—do not attempt to connect sensors.

• DC Polarity (Relay): Relay outputs are DC only—observe correct polarity.

• DC Polarity (SS): Solid-state outputs are DC-only and polarity-sensitive—reverse polarity destroys the MOSFET.

• Relay Current Limitation: Rated at 1A continuous @ 250VDC. Verify fan current does not exceed this limit.

• SS Current Limitation: Rated at 2A continuous @ 24–48VDC.

• Inductive Load Derating (Relay): Derate to 0.75A or use external RC snubbers (rated for 250VDC).

• No AC Connection: Do not connect AC loads to either output type.

• 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 defaults to 100% fan speed.

• Firmware Compatibility: Revision C firmware is compatible with Mark V CPU firmware v4.0 and above. For v3.x, the enhanced ADC features may be partially disabled—confirm compatibility before purchasing.