ABB 3BHE025541R0101 PCD231B101
Overview
The 3BHE025541R0101 is the specific order code for the PCD231B101 module. This module is a Process Controller Board. It acts as the "brain" of a Harmony Rack (HR) or Melody Controller (M01) within the Symphony Plus system, executing control logic, performing calculations, and managing communication.
Key Technical Parameters
Here are the primary technical specifications for the PCD231B101 controller:
| Parameter Category |
Technical Specification |
| Product Family |
ABB Symphony Plus (Part of the Harmony/Melody Line) |
| Module Type |
Process Controller Board (or Module) |
| Controller Type |
32-bit RISC-based microprocessor. |
| Memory |
Typically features significant onboard RAM and Flash memory for operating system, application code, and data storage. Exact sizes are proprietary but are designed for large, complex control strategies. |
| Battery |
Includes an onboard lithium battery (e.g., CR2032) to maintain the real-time clock and preserve RAM contents during power loss. |
| Communication Ports |
• S-Bus (Serial Bus): The primary high-speed I/O bus for connecting to other modules in the same rack (e.g., Analog I/O, Digital I/O, Communication modules).
• C-Bus (Control Bus): The peer-to-peer network for communication between multiple controllers within the same system for coordinated control.
• E-Bus (Ethernet Bus): The interface for the Plant Network (typically Ethernet TCP/IP) for communication with operator workstations (HMI), engineering stations, and other higher-level systems. |
| Redundancy Support |
Fully Redundant (1:1) configuration is supported. This requires a pair of PCD231B101 controllers, a redundancy synchronization cable, and redundant power supplies. It enables bumpless switchover in case of a primary controller failure. |
| Operating System |
Runs a proprietary, real-time operating system (RTOS) optimized for deterministic and reliable control execution. |
| Programming & Configuration |
Configured and programmed using ABB's Composer Engineering Tools suite (e.g., Composer NT, Composer Harmony). Control strategies are built using standard languages like Function Block Diagrams (FBD), Ladder Logic (LD), and Structured Text (ST). |
| Firmware |
Firmware is version-specific and loaded via the engineering tools. It is crucial for compatibility with other system components. |
| Power Supply |
+5 VDC supplied by the parent rack's power supply module (e.g., a NIMP series power supply). It does not have an external power connection. |
| Environmental Conditions |
• Operating Temperature: 0 to 60 °C (32 to 140 °F)
• Storage Temperature: -40 to +85 °C (-40 to +185 °F)
• Relative Humidity: 5 to 95% (non-condensing) |
| Safety & Certifications |
Designed to meet rigorous industrial standards for EMI/RFI immunity, shock, and vibration. Certifications are typically held by the overall system/rack. |
| Physical Dimensions |
Standard double-wide Harmony module size. Must be installed in its designated slot within a Harmony Rack (e.g., a HRC01 chassis). |
Function and Role in the System
The PCD231B101 is not a stand-alone device. Its function is to:
Execute Control Logic: It runs the application program created by engineers to automate the process (e.g., controlling valves, pumps, turbines, boilers).
Process I/O Data: It reads input data from field devices (via I/O modules), processes it according to the control logic, and sends output commands back to the field devices.
Communicate: It exchanges data with:
I/O Modules via S-Bus.
Other Controllers via C-Bus for plant-wide control coordination.
Operator Stations & Historians via the E-Bus (Ethernet) for visualization and data logging.
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