Description
Key Technical Parameters
| Parameter | Specification |
|---|---|
| Manufacturer | General Electric (GE) |
| Series | Mark V (Speedtronic) |
| Full Model | DS3800NPOC |
| Power Supply | +5V DC @ 4.5A, +15V DC @ 0.8A, -15V DC @ 0.6A |
| Temperature Inputs | 8 thermocouple channels (12-bit ADC, ±2°C accuracy) |
| SS Outputs | 8 solid-state relays, 3A continuous @ 24–48VDC |
| Relay Outputs | 4 mechanical relays, 5A continuous @ 115VAC/30VDC (surge 10A) |
| Tachometer Inputs | None |
| Communication | Mark V proprietary parallel backplane bus |
| Operating Temperature | 0°C to +60°C |
| LED Indicators | Power, SS Run (8x green), Relay Run (4x amber), Over-Temp Alarm, Backplane Active |
Advantages and Distinctive Features
-
Solid-State-Primary Hybrid Architecture: 8 solid-state DC outputs (3A) + 4 high-current relays (5A) on a single board.
-
Full 8 Thermocouple Inputs: Comprehensive temperature monitoring.
-
Higher Solid-State Current (3A): Supports larger DC fans compared to 2A boards.
-
Higher Relay Current (5A): Supports larger AC/DC auxiliary loads compared to 3A boards.
-
Cost-Effective: No tachometer or RTD circuitry reduces cost.
-
Silent, Maintenance-Free Solid-State Outputs: Unlimited cycle life for DC fans.
-
Relay Auxiliary Outputs: 2500V galvanic isolation for AC/DC auxiliary loads.
-
Low EMI Emissions: Solid-state outputs minimize interference with sensitive cards.
Typical Application Fields
-
Mixed Fan Cabinets: Where larger DC fans and high-power AC/DC auxiliary devices coexist.
-
Climate-Controlled Indoor Installations: 0°C to +60°C range.
-
High-Cycle Applications: Unlimited solid-state switching life.
-
Cost-Conscious Applications: Where tachometer feedback and RTD inputs are not required.
Comparison with Related Models
| Feature | DS3800NPOC | DS3800NPDA | DS3800NPID | DS3800NMSA |
|---|---|---|---|---|
| SS Outputs | 8 × 3A | 8 × 3A | 8 × 3A | 8 × 2A |
| Relay Outputs | 4 × 5A | 4 × 5A | 4 × 5A | 4 × 3A |
| T/C Inputs | 8 | 8 | 4 | 8 |
| Tach Inputs | None | 2 channels | 2 channels | None |
| ADC | 12-bit (±2°C) | 12-bit (±2°C) | 12-bit (±2°C) | 12-bit (±2°C) |
| Operating Temp | 0°C to +60°C | 0°C to +60°C | 0°C to +60°C | 0°C to +60°C |
| Cost | High | High | Medium-High | Medium |
Selection Recommendations
-
Choose the DS3800NPOC if:
-
You need 8 solid-state DC outputs (3A) for larger main fans.
-
You also need 4 high-current mechanical relay outputs (5A) for auxiliary devices.
-
Your cabinet uses 8 thermocouple sensors for temperature monitoring.
-
You do not require tachometer feedback or RTD inputs.
-
You have a climate-controlled environment (0°C to +60°C).
-
-
Choose the DS3800NPDA if: You need tachometer feedback with the same outputs.
-
Choose the DS3800NMSA if: You need 2A solid-state outputs and 3A relay outputs.
Critical Precautions
-
ESD Protection: Always wear a grounded wrist strap.
-
DC Polarity (SS): Solid-state outputs are DC-only and polarity-sensitive—reverse polarity destroys the MOSFET.
-
SS Voltage Limit: Do not exceed 48VDC—AC voltages cause catastrophic failure.
-
SS Current Limitation: Rated at 3A continuous. Verify fan current does not exceed this limit.
-
High-Voltage/Current Hazard (Relay): Relay outputs switch 115VAC/5A—lethal. Use proper insulation.
-
Relay Inductive Derating: For inductive loads, derate from 5A to 3.5A or use RC snubbers.
-
No Tachometer Inputs: Do not connect speed sensors.
-
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: The DS3800NPOC is compatible with all Mark V CPU firmware versions (v3.x and above). No specific CPU upgrade is needed.
A-B 1794-OB16
A-B 1756-DNB
A-B 1746-IB16
Reviews
There are no reviews yet.