SIEMENS 6ES7 321-1FH00-0AA0 SIMATIC DIGITAL INPUT MODULE + DIGITAL EINGABE

SIEMENS 6ES7 321-1FH00-0AA0 SIMATIC DIGITAL INPUT + DIGITAL EINGABE MADE IN CHINA  is a robust digital input module + DIGITAL EINGABE specifically designed for the SIMATIC S7-300 automation system. This optically isolated module features 16 input channels arranged in groups of four, providing high-performance electrical separation between field signals and the PLC backplane bus. Engineered for 120/230 V AC applications, it operates within a frequency range of 47 to 63 Hz and recognizes a “0” signal between 0 and 40V AC, while a “1” signal is detected between 79 and 264V AC. For a “1” signal, the typical input current is 6.5 mA at 120 V (60 Hz) and 16 mA at 230 V (50 Hz), with a fixed input delay of 25 ms for both signal transitions.