Schneider BMXEHC0800 Fast Counting Module 8 Channels 10kHz

The Schneider BMXEHC0800 is a high-speed counting module for the Modicon X80 and M340 automation platforms. It features eight independent 32-bit counter channels, each capable of handling input frequencies up to 10 kHz. The module is designed for applications requiring precise pulse counting, position measurement, and frequency monitoring.

Counting Modes

Each channel supports multiple operating modes: up/down counting, two-axis encoder (phase A/B), external direction, single-phase with direction, and pulse/direction. It can also function as a frequency meter or period meter. Configurable hysteresis and programmable thresholds enable signal conditioning.

Input Specifications

Inputs are compatible with 5V, 12V, or 24V DC signals (selectable via jumper). Maximum input frequency is 10 kHz with 24V, 20 kHz with 5V/12V. Minimum pulse width is 50 µs. Each channel includes a hardware latch input for high-speed capture. Input impedance is 4.7 kΩ at 24V.

Output Functions

Each counting channel has a dedicated digital output that can be triggered by comparison values (equal, greater, less) or by a configurable threshold. Outputs are transistor-based, 24V DC, 0.5A, with short-circuit protection. They can be used for position-based switching, alarms, or resetting counters.

Integration with Modicon X80

The BMXEHC0800 mounts on the X80 or M340 backplane and is configured via EcoStruxure Control Expert (formerly Unity Pro). It provides immediate access to counter values, status bits, and diagnostic information. Up to eight modules can be installed per rack, for a total of 64 counting channels.

Diagnostic Features

LED indicators for each channel show input activity and output status. The module detects sensor supply faults, wire breaks, and overcurrent. All events are logged in the module's fault buffer. Hot-swappable design allows replacement without powering down the PLC.

Mechanical and Environmental

Dimensions: 32 x 100 x 86 mm, weight 117 g. Operating temperature 0°C to 60°C. The module uses a removable terminal block for easy wiring. Power consumption is 100 mA from 5V backplane plus 35 mA from 24V sensor supply.

Typical Applications

Used for conveyor belt length measurement, rotational speed monitoring (with encoder), cut-to-length control, flowmeter pulse accumulation, and high-speed part counting. The eight channels can handle diverse sensors simultaneously.

Conclusion

The Schneider BMXEHC0800 fast counting module brings eight high-speed counters to Modicon X80/M340 systems. Its 10 kHz capability and flexible counting modes suit demanding motion and production monitoring applications.