Siemens 6ES7322-1BL00-0AA0 Digital Input Module

The Siemens 6ES7322-1BL00-0AA0 Digital Input Module for SIMATIC S7-300 provides 16 discrete 24 V DC input channels to reliably acquire field signals from sensors, switches, pushbuttons, and safety devices. Designed for PB-bus rack installation, it interfaces these devices with PLC control logic using positive logic (PNP) inputs that draw roughly 2–3 mA per channel and a standard industrial input response. Each channel includes an LED indicator for local monitoring, and the module is IP20 protected in its enclosure for use in typical industrial environments while operating within industrial temperature ranges. Common replacements include Siemens 6ES7 322‑1BL01‑0AA0, 6ES7 322‑1BH01‑0AA0, and 6ES7 322‑1BL00‑0AB0, and the alternate reference is 6ES73221BL000AA0.