This Schneider CPU module serves as the central processor for Modicon PLC systems. The SCHNEIDER PCBALU205 executes control programs with high reliability and efficiency. Its compact design fits into standard rack configurations. This module handles both discrete and analog I/O operations effectively.
Physical Dimensions and Mounting Specifications
The CPU module measures 160 mm in height and 60 mm in width. Its overall depth reaches 120 mm including the front connector. This unit weighs approximately 0.5 kilograms for stable rack installation. The housing features a robust plastic enclosure for protection. The SCHNEIDER PCBALU205 plugs directly into the designated rack slot. A 48-pin backplane connector transfers power and signals.
Processor and Memory Architecture
An integrated 16-bit microprocessor handles all computational tasks efficiently. The processor operates at a clock frequency of 10 MHz for fast execution. This unit includes 64 KB of RAM for user program and data storage. A separate 128 KB EPROM holds the operating system firmware. The SCHNEIDER PCBALU205 provides 32 KB of retentive memory for critical data. An integrated lithium battery maintains this memory for up to 4 years. An internal capacitor of 470 µF bridges brief power interruptions.
Communication and System Capabilities
This CPU offers one RS-232 port for programming device connection. A second RS-485 interface supports Modbus network communication. The unit handles up to 256 digital I/O points for system flexibility. It also manages up to 32 analog channels for process monitoring. The SCHNEIDER PCBALU205 processes 1024 instructions in approximately 3.0 milliseconds. Four interrupt inputs enable priority-based event handling. A watchdog timer monitors program execution continuously.
Detailed Specification Table
| Parameter | Specification |
|---|---|
| Dimensions (H x W x D) | 160 mm x 60 mm x 120 mm |
| Weight | Approx. 0.5 kg |
| Processor Type | 16-bit microprocessor |
| Clock Frequency | 10 MHz |
| RAM Capacity | 64 KB |
| EPROM Capacity | 128 KB |
| Retentive Memory | 32 KB |
| Battery Backup Life | 4 years |
| Energy Storage Capacitance | 470 µF |
| Digital I/O Capacity | 256 points |
| Analog Channel Capacity | 32 channels |
| Program Execution Time | 3.0 ms / 1024 instructions |
| Communication Ports | RS-232, RS-485 (Modbus) |
| Interrupt Inputs | 4 |
| Operating Temperature | 0°C to 55°C |
Application and Commissioning Guidelines
Insert this CPU into the designated slot of the Modicon rack system. Connect the programming device to the RS-232 port for initial setup. Download the user program and system parameters via the serial interface. The SCHNEIDER PCBALU205 operates reliably between 0°C and 55°C. Ensure sufficient airflow around the CPU for proper heat dissipation. Configure the Modbus communication settings to match peripheral device requirements. Monitor the front-panel LEDs for system status and fault indicators. Replace the backup battery every three years to prevent memory loss.
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 110 × 55 × 90 mm |
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