Supply Siemens PLC 6ES7321-1BH02-0AA0 SM321 16DI 24VDC Standard Digital Input Expansion Module
We supply 100% original Siemens 6ES7321-1BH02-0AA0 (SM321) for SIMATIC S7-300 PLC. It’s a standard 16-channel 24VDC digital input module with opto-isolation, designed for general-purpose signal acquisition from switches, sensors and proximity detectors. German-made, factory sealed, 12-month official warranty, ready stock, global shipping.