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The Original ABB 3ASC25H203 DAPC100 Board Spare is a PCB-based drive controller designed for ABB DARA-series AC variable-speed drives. It serves as the core processing unit for motor speed and torque regulation, acquiring analog and digital field signals, executing closed-loop control algorithms, and communicating with the drive’s power stage and external HMI.
Key Features
- On-board 24 VDC to 5 VDC logic supply conversion
- CMT (Compact Memory Technology) memory stick slot for program and parameter storage
- Ethernet and RS-485 communication interfaces for drive-to-PLC / HMI linkage
- Multi-channel analog signal acquisition and control output
- Compact PCB form factor for mounting inside the drive cubicle
- Industrial-grade design for -20 °C to +60 °C operation
Technical Specifications
| Item | Detail |
|---|---|
| Type Designation | DAPC100 |
| Part Number | 3ASC25H203 |
| Function | Drive control board for AC variable-speed drives |
| Compatible Systems | ABB DARA 1000 / 2000 series AC drives |
| Input Supply | 24 VDC |
| On-board Logic | 5 VDC (generated on-board) |
| Memory | CMT memory stick (plug-in) |
| Communication | Ethernet, RS-485 |
| Signal Type | Analog / digital I/O |
| Operating Temp. | -20 °C … +60 °C |
| Dimensions (W×H×D) | 100 × 70 × 25 mm |
| Weight | 0.37 kg |
| Protection | IP20 |
| Origin | Switzerland |
Installation Notes
- Isolate the drive’s 24 VDC control supply before removing or inserting the board.
- Seat the DAPC100 on the backplane connectors inside the drive cubicle; ensure the board locks firmly into place.
- Insert the CMT memory stick into its slot — parameters and firmware are stored on the stick, not on the board itself.
- Verify Ethernet / RS-485 fieldbus wiring before restoring control power.
- Confirm the drive’s HMI shows normal control board status after power-up; check the 5 VDC logic rail if no display appears.
Common Questions
What is the CMT memory stick for? The CMT (Compact Memory Technology) stick carries the drive firmware, application parameters, and tuning data. When replacing a DAPC100, transfer the existing CMT stick to the new board to avoid reloading parameters.
Can this board be used in an ACS800 or ACS880 drive? No. The DAPC100 is specific to the legacy DARA 1000 / 2000 drive family. Modern ACS-series drives use different control boards (e.g., RDCU, JCU) and are not drop-in compatible.
What voltage does the board run on? The board is powered by 24 VDC from the drive’s auxiliary control supply; it generates its own 5 VDC logic internally. It is not a mains-voltage board and must not be wired directly to line power.
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