Siemens PLC 6ES7321-1CH00-0AA0 SM321 16-Channel Isolated 24-48V AC/DC Digital Input Expansion Module from Germany
We offer authentic Siemens 6ES7321-1CH00-0AA0, a high‑quality SM321 digital input module for SIMATIC S7‑300 PLC systems, sourced directly from Germany. It provides 16 galvanically isolated digital inputs supporting 24–48V AC/DC, suitable for universal industrial signal collection. Genuine German manufacture, factory sealed, 12‑month official warranty, in stock, competitive price, fast global delivery.