Danfoss CARD 175H3828 DT2 – Inverter Drive Control Circuit Board | VLT Series Platform
Engineering Background: The Danfoss VLT series represents one of the most widely deployed variable frequency drive (VFD) platforms in industrial automation globally. The control circuit board is the intelligence core of the drive — managing PWM signal generation, fault diagnostics, parameter storage, and communication interfacing. When this board fails, the entire drive becomes inoperable, making fast, verified replacement critical to minimizing downtime.
Product Positioning: The DANFOSS CARD 175H3828 DT2 is an OEM-specification control circuit board designed for direct replacement in compatible Danfoss VLT series frequency converters. Sourced through verified industrial supply channels and inspected prior to dispatch, this board is the preferred choice for maintenance engineers, OEM integrators, and MRO procurement teams requiring a reliable, drop-in solution.
Complete Technical Specifications
- Part Number: 175H3828
- Revision / Variant: DT2
- Component Type: Control Circuit Board (PCB Assembly)
- Compatible Platform: Danfoss VLT Series Frequency Converters
- Manufacturer: Danfoss A/S
- Country of Origin: Denmark (DK)
- Board Function: Drive control logic, PWM output, fault management, parameter memory, fieldbus interface support
- Mounting: Internal PCB — direct OEM replacement
- Operating Temperature: Per VLT drive specification (typically –10°C to +50°C ambient)
- Compliance: CE marked per applicable Danfoss drive certification
- Weight: 780 g (packaged)
Proven Application Environments
- HVAC systems — air handling units, chiller plants, cooling towers
- Water & wastewater — pump stations, aeration blowers, dosing systems
- Food & beverage — conveyor drives, mixer controls, packaging lines
- Marine & offshore — deck machinery, thruster control, auxiliary drives
- Industrial manufacturing — CNC auxiliary drives, compressor control, fan systems
- Building automation — elevator auxiliaries, escalator drives, BMS-integrated HVAC
Engineering Advantages
- OEM-Identical Specification: Direct replacement — no firmware flashing or parameter reconfiguration required in most applications
- Verified Revision DT2: Revision-specific sourcing ensures hardware compatibility with your existing drive chassis
- Reduced Downtime: Ready-to-install board eliminates the lead time of factory repair or full drive replacement
- Cost Efficiency: Board-level replacement vs. full drive replacement delivers significant CAPEX savings
- Traceability: Each unit ships with documentation supporting your maintenance records and audit trail
System Architecture & Signal Flow
The CARD 175H3828 DT2 sits at the center of the VLT drive’s control hierarchy. It receives reference signals (analog/digital inputs or fieldbus commands), executes the motor control algorithm (V/f or vector), generates PWM gate signals to the IGBT power module, monitors real-time feedback (current, voltage, temperature), and manages fault logging to EEPROM. The board also hosts the drive’s communication interface — supporting protocols such as RS-485 (FC protocol / Modbus RTU) and optional fieldbus cards depending on drive variant.
Sourcing & Quality Verification
- Sourced from verified industrial distributors and OEM surplus channels
- Pre-shipment visual and functional inspection performed on each unit
- Anti-static packaging (ESD-safe bag + foam insert) for PCB protection in transit
- Batch traceability maintained — lot and revision records available on request
- 30-day return window for DOA (Dead on Arrival) units with inspection report
Procurement Process
- Confirm Compatibility: Verify your drive’s nameplate part number and existing board revision against 175H3828 DT2
- Request Quote: Contact us at support@konmask.com for volume pricing or urgent delivery requirements
- Place Order: Secure checkout via Konmask.com — B2B invoicing available upon request
- Dispatch: Orders confirmed before 14:00 CST typically ship same business day
- Installation Support: Our technical team can advise on board swap procedures and parameter backup best practices
Technical FAQ
Q: Is the DT2 revision backward compatible with earlier board revisions?
A: Revision compatibility depends on the specific drive chassis and firmware version. We recommend confirming the existing board revision before ordering. Contact our team for compatibility guidance.
Q: Does this board require parameter re-entry after installation?
A: If the original board’s EEPROM is intact and transferable, parameters can be copied. Otherwise, parameters must be re-entered from your commissioning records. We recommend backing up parameters via the LCP or PC tool before any board swap.
Q: Can you supply other Danfoss VLT control boards?
A: Yes. Konmask.com maintains sourcing access to a wide range of Danfoss VLT and FC series spare parts. Submit your part number via email for availability and pricing.
Q: What is the lead time for this part?
A: In-stock units ship within 1–2 business days. For out-of-stock items, typical sourcing lead time is 5–15 business days depending on origin.
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