Siemens 6ES7 350-1AH03-0AE0 is the SIMATIC S7-300 FM350-1 counter module designed for high-speed pulse counting in PLCs. This one-channel counter connects to 5 V and 24 V incremental encoders and supports isochronous mode for precise timing, with a measuring capability up to 500 kHz. It can be installed alongside active bus modules and supports synchronous operation within a SIMATIC S7-300 configuration, making it suitable for encoder-based position or speed measurement, event counting, and high-speed feedback in automation systems.
