Description
Technical Parameters
- Manufacturer: Danfoss / Vacon
- Model Number: SPR-CMB28567
- Part Number: 181B2557
- Frame Size: CH63 (High Power Series)
- Function: IGBT Gate Driver Board
- Drive Series: Vacon NXP / NXi Series Inverters
- Control Signal: Optical fiber or ribbon cable interface for PWM signal transmission
- Protection Logic: Integrated desaturation monitoring and overcurrent detection
Product Datasheet
| Specification | Details |
|---|---|
| Model | SPR-CMB28567 / 181B2557 |
| Frame Size | CH63 |
| Origin | Finland |
| Weight | 0.95 kg |
| Cooling | Forced air / Natural convection within drive chassis |
| Input Interface | Multi-pin header for power and feedback |
| Output Type: | Gate signals for Phase Modules |
| Operating Temp | -10°C to +50°C |
Application Fields
The SPR-CMB28567 is a specialized power electronics board used in high-demand environments:
- Heavy Industry: Managing motor speed and torque for large extruders, fans, and pumps.
- Marine & Offshore: Control of propulsion drives and large winch systems on vessels.
- Renewable Energy: Integrated into grid-tie inverters for large-scale wind or solar installations.
- Mining Operations: Powering conveyor systems and crushers requiring high-power NXP drives.

Product Instructions
- Discharge Time: After powering down the drive, wait at least 15 minutes for the DC bus capacitors to fully discharge before opening the CH63 frame.
- Fiber Optics: If this board utilizes fiber optic cables for PWM signals, ensure the connectors are clean and not bent beyond their minimum radius.
- IGBT Check: Before installing a new driver board, verify the health of the associated IGBT modules to ensure a faulty module doesn’t damage the new PCB.
- Mounting: Ensure all spacers and mounting screws are tightened to spec to provide adequate grounding and vibration resistance.
- Initialization: Use the Vacon Live or NCDrive software to check for “Gate Driver” faults or communication errors upon the first power-up.
Q&A
Q1: What does the “CH63” designation refer to? A1: CH63 refers to the physical frame size of the Vacon drive. This driver board is specifically designed to fit the mechanical and electrical layout of these large, high-capacity liquid or air-cooled units.
Q2: Can I use the 181B2557 to replace an 181B2556? A2: No. While they may appear similar, these boards are tuned for specific current ratings and gate drive requirements. Always match the exact part number.
Q3: Why are there several fiber optic ports on the board? A3: These ports provide galvanic isolation between the low-voltage control circuits and the high-voltage power stage, ensuring safety and reducing electrical noise interference.
Recommended Similar Models
- Vacon SPR-CMB28566
- Vacon 181B2555
- Vacon SPR-CRI12345
- Danfoss 176F7330
- Vacon VDB-04C

