Multiple I/O Functions and Status Indication
The F405 provides multiple I/O functions especially for Automatic Train Operation (ATO). All digital inputs can be operated with common GND or common positive voltage in the range of -110 V to +110 V. The pulse counter inputs can be used to connect a speed sensor and provide frequency and distance measurement as well as direction, standstill and rolling detection as built-in functions which are all integrated in the FPGA.
The board's high-side switching digital outputs support voltages in the range from 24 V to 110 V. The analog outputs provide the output value as voltage or as current. With their programmable cycle and pulse length, the PWM outputs are suitable for, e.g., engine power control.
The status of all inputs and outputs as well as the indication of OK and reset is shown via LEDs on the front panel.