Topics Covered:

• Concept of Signalling Blocks and the Principle of Block Proving
• Why Block Proving is Critical for Train Safety & Headway
• Introduction to Axle Counters: Working Principle
• Comparison: Axle Counters vs. Track Circuits

Learning Outcomes:
– Understand the purpose of block proving and its role in train separation.
– Explain the functional difference between axle counters and track circuits.
– Identify scenarios where axle counters are preferred over traditional methods.
– Relate BPAC to overall signalling interlocking logic.

Topics Covered:

• Key Components: Wheel Sensors, Counting Heads, Evaluator Units, and Reset Points
• Signal Transmission and Communication Interfaces
• System Layout for Single Section BPAC
• Design and Redundancy Considerations

Learning Outcomes:
– Identify and describe each component of a single section BPAC system.
– Interpret typical system architecture and layout diagrams.
– Understand how axle counter systems interface with the signalling network.
– Recognize how redundancy and fail-safe principles are built into BPAC design.

Topics Covered:

• Siting and Mounting of Axle Counter Units
• Configuration Parameters: Sensitivity, Counting Logic, and Reset Zones
• Alignment Procedures and Initial Calibration
• Commissioning Tests and Validation Steps

Learning Outcomes:
– Learn best practices for siting and mounting of wheel sensors.
– Understand configuration parameters and how they affect system accuracy.
– Perform a conceptual walk-through of commissioning and testing workflows.
– Identify key steps to ensure reliability during initial deployment.

Topics Covered:

• Common Failure Modes and Counting Errors
• Handling Environmental Effects (weather, debris, EMI/EMC)
• Diagnostic Tools and Error Logs
• Preventive Maintenance and Safety Standards (RDSO/EN norms)
• Record-Keeping, Reset Procedures, and Fail-Safe Design

Learning Outcomes:
– Diagnose and interpret common BPAC fault scenarios.
– Understand how environmental conditions affect system performance.
– Learn maintenance practices to enhance reliability and longevity.
– Recognize safety compliance standards and documentation requirements.