Designed by SITE’s Research & Development Division, the BCA-M (Axle Counter Block) combines the benefits of axle detection with an innovative management of multi-section lines, using a redundant vital platform. The system detects sections occupied by trains along lines of the following types.

The SITE Axis Counter Block is based on an internal distributed architecture, which facilitates its installation in sections with varying geographical and topological extensions.
The architecture is designed to distribute functions that interface with the counters in the field, called PCA-R, maintaining a centralised control over system functioning using the central unit BCA-R.

The flexibility offered by the system with regard to the physical placement of the devices can satisfy a wide range of infrastructure managers’ needs.

  • Number of controlled sections: 1 to 32
  • Communication through LAN/WAN Ethernet network of optical fibre or copper cables (coaxial cable, STP cable, railway twisted pair)
  • Interfacing with signalling system relays via dedicated remote input/output connections with safety integrity level SIL 4 using a data transmission protocol that conform to the EN50159 standard
  • A highly redundant system:
    • An internal 2oo3 electronic architecture
    • Optional LAN/WAN connection redundancy
    • Optional axis detection sensor redundancy (up to 2 per counter)
    • Optional line entry counter redundancy

SITE’s axle counter block (BCA) system offers the following functions:

  • Innovative automated track opening for traffic (multi-section applications)
  • Innovative self-reconfiguration function along extended sections in case of anomaly / failure (multi-section applications)
  • Possibility of operating 1 or 2 sensors per axle counter
  • Panel keys for conditional or unconditional track opening
  • Monitoring and diagnostics data using SNMP protocol
  • Complete control of the railway infrastructure manager over the configuration of system type
  • Detection of trains travelling along high-speed (AV) lines