Description
The ABB 3ASC25H204, designated DAPU 100, is an ABB I/O Control Board used in industrial drive and automation systems. ABB’s product information classifies it specifically as a “Control board, I/O” and places it within the spare-parts category for motor-control and drive-service applications.
The board provides the interface between process I/O signals and the associated ABB control system. Its status indicators include I/O communication, I/O extension, RUN/OK, and terminal connection functions.
🔧 Key Features
• ABB DAPU 100 I/O control board
• Part number 3ASC25H204
• Designed for ABB industrial control and drive systems
• Process I/O communication interface
• I/O extension capability
• RUN/OK diagnostic indication
• Terminal connection monitoring
• Compact spare-part construction
• Suitable for legacy ABB automation installations
📋 Product Datasheet
• Brand: ABB
• Model: DAPU100
• Part Number: 3ASC25H204
• Product Type: I/O Control Board
• System Category: ABB Motor Control / Drive Service
• Main Function: Process I/O Control and Interface
• I/O Communication: Process I/O communication
• I/O Extension: Supported
• Status Indicators: I/O, I/O E, RUN OK, TERM
• Power Supply: System-dependent*
• Communication: ABB process I/O interface
• Net Weight: 80 g
• Dimensions: Approx. 135 × 105 × 75 mm*
• Mounting: ABB control system / process I/O assembly
• Operating Temperature: Approx. -25 to +60 °C*
• Storage Temperature: Approx. -40 to +85 °C*
• Country of Origin: Finland / Sweden
• Application: Industrial Automation / Drive Control
ABB’s catalog data lists a net product weight of 80 g and identifies Finland and Sweden as possible countries of origin.
🏭 Typical Applications
The ABB 3ASC25H204 DAPU100 can be used in:
• Industrial drive systems
• Motor control equipment
• Process automation
• Manufacturing machinery
• Industrial production lines
• Legacy ABB control systems
• Drive maintenance and retrofit projects
⚡ Functional Description
The DAPU100 functions as an I/O control interface within the ABB automation architecture. It handles process I/O communication and provides status information through onboard indicators.
The four commonly identified indicators are:
• I/O — Process I/O communication
• I/O E — Process I/O extension communication
• RUN OK — Module operating status
• TERM — Terminal connection status
This makes the LEDs useful during commissioning and troubleshooting.
🔌 Installation & Configuration
Basic installation procedure:
• Confirm the complete part number 3ASC25H204
• Verify DAPU100 compatibility with the existing ABB system
• Check the board revision and connector arrangement
• Install the board in the designated position
• Connect the process I/O wiring
• Restore system power
• Check the I/O, RUN/OK, and terminal indicators
During commissioning, verify communication with the process I/O system and confirm that all connected signals are correctly recognized.
🛠️ Replacement Notes
Before replacement, check:
• Exact part number 3ASC25H204
• ABB designation DAPU100
• Existing control-system configuration
• Connector and terminal arrangement
• Hardware revision
• Original parameter and I/O configuration
After installation:
• Confirm RUN/OK status
• Check I/O communication
• Verify terminal connection indication
• Test connected field signals
• Review system diagnostics
• Perform normal machine operation testing
📦 Ordering Information
The correct identification is:
ABB 3ASC25H204 DAPU100 | I/O Control Board | ABB Drive & Industrial Automation Spare Part
ABB’s catalog identifies 3ASC25H204 / DAPU 100 as an I/O Control Board and lists it as a spare part associated with motor-control and drive-service applications. The product is also listed as discontinued by some industrial parts distributors, so exact hardware identification is important when sourcing a replacement.
