Description
Key Technical Parameters
| Parameter | Specification |
|---|---|
| Full Model | DS3800NHVD1C1B |
| Power Supply | +5V DC @ 3.2A, +15V DC @ 0.5A, -15V DC @ 0.3A |
| Temperature Inputs | 8 thermocouple channels (Type J/K/T, 16-bit ADC, ±1°C accuracy) |
| Fan Outputs | 8 mechanical relays, 1A continuous @ 250VDC (surge 2A) |
| Tachometer Inputs | None |
| Communication | Mark V proprietary parallel backplane bus |
| Operating Temperature | -20°C to +65°C |
| Fault Log | Basic |
| LED Indicators | Power, Fan Run (8x amber), Over-Temp Alarm, Backplane Active |
Advantages and Distinctive Features
-
250VDC High-Voltage Output Capability: Supports 220–250VDC fan systems—ideal for high-voltage industrial, railway, and specialized turbine applications.
-
Improved Temperature Accuracy (16-bit ADC): ±1°C accuracy—upgrade from the base 12-bit (±2°C) model.
-
Extended Temperature Range: -20°C to +65°C supports moderately harsh environments.
-
Mechanical Relay Isolation: 2500V galvanic isolation between control logic and high-voltage fan circuits.
-
Enhanced Cold-Junction Compensation (Revision C): Improved temperature measurement reliability.
Typical Application Fields
-
High-Voltage Industrial Fan Systems: 220VDC or 250VDC motor control.
-
Railway and Traction Applications: High-voltage DC auxiliary systems.
-
Specialized Turbine Installations: High-voltage DC cooling systems.
-
Moderately Harsh Environments: -20°C to +65°C range.
Comparison with Related Models
| Feature | DS3800NHVD1C1B | DS3800NHVD (Base) | DS3800NHVB | DS3800NGTA1B1A |
|---|---|---|---|---|
| Output Voltage | 250VDC | 250VDC | 125VDC | 30VDC / 115VAC |
| Output Current | 1A @ 250VDC | 1A @ 250VDC | 2A @ 125VDC | 3A @ 30VDC |
| ADC Resolution | 16-bit (±1°C) | 12-bit (±2°C) | 12-bit (±2°C) | 16-bit (±1°C) |
| Operating Temp | -20°C to +65°C | 0°C to +60°C | 0°C to +60°C | 0°C to +60°C |
| Onboard Logic | No | No | No | No |
| Cost | Medium-High | Medium | Medium | Medium |
Selection Recommendations
-
Choose the DS3800NHVD1C1B if:
-
Your fans operate on 220–250VDC high-voltage DC systems.
-
You want improved temperature accuracy (±1°C).
-
You need extended temperature range (-20°C to +65°C).
-
You do not require tachometer feedback.
-
-
Choose the DS3800NHVB if: Your fans operate on 110–125VDC systems.
-
Choose the base DS3800NHVD if: You need 250VDC capability without improved accuracy or extended temperature range.
Critical Precautions
-
ESD Protection: Always wear a grounded wrist strap.
-
Extreme High-Voltage Hazard: Switches 250VDC—lethal voltage present on output terminals. Observe all high-voltage safety procedures. Use wiring rated for ≥250VDC.
-
DC Polarity: Outputs are DC only—observe correct polarity.
-
Current Limitation: Rated at only 1A continuous. Verify fan current does not exceed this limit.
-
Inductive Load Derating: For inductive fan motors, derate to 0.75A or use external RC snubbers (rated for 250VDC).
-
No AC Connection: Do not connect AC loads.
-
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 accuracy may be partially disabled—confirm compatibility before purchasing.
A-B 1756-RMC1
ABB TU810V1
ABB ZMU-02
Reviews
There are no reviews yet.