ABB DSPC170 Central Processing Unit (CPU) Module

• Memory:
  • Program memory: Up to 8 MB (application code)
  • Data memory: Up to 4 MB (reserved and non-reserved)
• I/O Capacity: Supports up to 64 I/O modules per station (depending on rack type)
• Communication Ports:
  • 1x Ethernet (RJ-45): 10/100 Mbps, supports Modbus TCP and AF 100 protocols
  • 1x RS-485 (optional): For legacy device integration
• Redundancy: Supports hot standby redundancy with DSPC170R partner module
• Power Consumption: Approximately 5W
• Operating Temperature: 0°C to +60°C
• Certifications: Complies with IEC 61131-3 (logic), IEC 61000-6-2/4 (EMC), and EN 61010 standards

Functional Characteristics

• High-Speed Execution: Performs complex logic faster than traditional AC 450/460 controllers, with critical task scan times as low as 10ms.
• Integrated Communication: Directly connects to System 800xA or peer controllers via Ethernet, eliminating the need for separate bus adapters.
• Modular Design: Single-slot CPU for Symphony Plus S I/O racks (e.g., TK811/TK812), reducing hardware footprint and improving reliability.
• Multi-Tasking Support: Enables rapid (10ms), standard (100ms), and background tasks for optimized control performance.
• Robust Diagnostics: LED indicators for run, stop, I/O status, communication health, and redundancy state.
• Backward Compatibility: Works with many existing Symphony I/O modules, facilitating brownfield modernization projects.

Application Scenarios

• Power Generation: Controls boiler/turbine systems in fossil fuel, nuclear, or combined cycle plants. Manages critical parameters like drum water level, furnace pressure, and fuel-air ratio.
• Oil and Gas: Regulates compressor and pipeline operations in natural gas transmission. Ensures safe and efficient flow control through redundant communication and deterministic performance.
• Chemical Processing: Sequences process steps in chemical or pulp/paper plants. Integrates with analog (DSAI130A) and digital (DSDI132/DSDO132) I/O modules for precise control.
• Safety Systems: When paired with certified application logic, it supports safety-related interlocks in high-risk environments.
• Legacy Modernization: Extends the life of traditional field devices by bridging them to modern control systems via serial communication ports (RS-485).

Key Advantages

• Deterministic Control: Microsecond-level task support ensures predictable performance for time-critical applications.
• Reduced Downtime: Hot standby redundancy with automatic synchronization minimizes disruption during controller switchovers.
• Simplified Integration: Seamlessly connects to ABB System 800xA and third-party systems using standard protocols like Modbus TCP and AF 100.
• Future-Proof Design: Supports new projects and brownfield upgrades with its modular architecture and backward compatibility.
• Cost Efficiency: Low power consumption and high channel density lower total cost of ownership over the system lifecycle.