ABB 3ASC25H204 DAPU100 Digital I/O Processing Unit

• Electrical Parameters
  • Power supply: 24V DC ± 10% (redundant power input optional for fault tolerance).
  • Power consumption: Maximum 12W (full load, including all I/O channels active).
  • Electrical isolation: 2.5kV AC galvanic isolation between power supply, I/O circuits, and communication ports.
• Communication Parameters
  • Communication interface: 1 x Profibus DP port (slave mode); 1 x RS-485 port (supports Modbus RTU protocol).
  • Communication rate: Profibus DP (9.6 kbps – 12 Mbps, auto-negotiation); Modbus RTU (9600 – 115200 bps, configurable).
  • Signal transmission distance: Up to 1200m (Profibus DP, using twisted-pair cable); up to 1000m (RS-485, using twisted-pair cable).
• Environmental Parameters
  • Operating temperature: -20°C to +60°C.
  • Storage temperature: -40°C to +85°C.
  • Relative humidity: 5% – 95% RH (non-condensing, no dew formation).
  • Protection level: IP20 (for panel/rack mounting); IP65 (optional for field-mounted enclosures).
  • Vibration resistance: 10Hz – 55Hz, 0.15mm amplitude (per IEC 60068-2-6).
  • Shock resistance: 15g acceleration (11ms duration, per IEC 60068-2-27).
• Physical Parameters
  • Dimensions: 140mm (width) × 80mm (height) × 180mm (depth) (standard 1/4 DIN size).
  • Installation: DIN rail mounting (35mm standard rail) or panel mounting.
  • Weight: Approximately 0.8kg (excluding mounting accessories).

Functional Features

• High-Density Digital I/O Processing
  • Integrates 16 digital input and 16 digital output channels in a compact form factor, maximizing I/O density per unit space and reducing the number of modules required for large-scale applications.
  • Supports both dry contact inputs (for sensors/switches) and relay outputs (for actuators/valves), eliminating the need for external signal converters.
• Reliable Signal Isolation and Protection
  • Galvanic isolation between power, I/O, and communication circuits prevents cross-interference from high-voltage spikes or ground loops, protecting both the DAPU100 and connected field devices.
  • Digital outputs include built-in overcurrent protection (via thermal fuses) to prevent relay damage from overloads or short circuits.
• Flexible Distributed Deployment
  • Compact design and support for distributed installation allow placement near field devices, minimizing long-distance wiring (reducing material costs and signal attenuation) and simplifying system expansion.
  • Compatible with ABB’s remote I/O networks, enabling integration into large-scale distributed control systems without compromising response speed.
• Easy Integration and Configuration
  • Supports standard industrial protocols (Profibus DP, Modbus RTU) for seamless connection to ABB DCS/PLCs and third-party control systems (e.g., Siemens S7, Rockwell Allen-Bradley).
  • Configuration via ABB’s Control Builder M software (for System 800xA®) or third-party Modbus configuration tools, with user-friendly interfaces for setting I/O parameters, alarm thresholds, and communication settings.
• Real-Time Monitoring and Diagnostics
  • Built-in status LEDs for each I/O channel (input signal presence, output relay state) and system indicators (power, communication, fault) for quick visual troubleshooting.
  • Supports remote diagnostics via communication protocols—enabling monitoring of channel status, power supply voltage, and fault codes from the upper-level control system, reducing on-site maintenance time.

Application Scenarios

• Petrochemical and Chemical Industry
  • Used for monitoring and controlling on/off valves, pump starters, and pressure/temperature switches in reactor systems, distillation columns, and pipeline networks.
  • Deployed in hazardous area peripherals (with IP65 enclosures) to manage digital signals from gas detectors, emergency shutdown (ESD) triggers, and safety interlocks.
• Power Generation (Thermal, Hydro, Wind)
  • Manages digital signals from turbine auxiliaries (e.g., lubrication pump switches, bearing temperature alarms), generator breakers, and transformer cooling fan controls.
  • Integrates with wind turbine control systems to process signals from wind speed sensors, yaw motor actuators, and emergency stop switches.
• Manufacturing Industry (Automotive, Electronics)
  • Controls assembly line components: conveyor belt starters, robotic end effector clamps, and part presence sensors in automotive body welding or electronics circuit board assembly lines.
  • Monitors and triggers quality inspection devices (e.g., vision system triggers, reject gate actuators) to ensure production accuracy.
• Water and Wastewater Treatment
  • Operates sludge pump on/off controls, valve actuators for water distribution, and level switch monitoring in sedimentation tanks, filtration systems, and disinfection units.
  • Integrates with SCADA systems to execute remote control commands for pump stations and wastewater treatment processes.
• Building Automation and Infrastructure
  • Manages HVAC system components: air handler fans, damper actuators, and fire alarm contact inputs in large commercial buildings or industrial facilities.
  • Controls access control systems (e.g., door lock actuators, card reader inputs) and parking garage barrier gates in infrastructure projects.