Siemens 6ES7 321-1BH01-0AA0 is a SM321 digital input module for SIMATIC S7 systems, providing 16 channels of 24 V DC inputs. Designed for backplane mounting with grouping of 16, it reads discrete field signals from sensors and switches and interfaces with the S7-300/ET 200M ecosystem. This 16xDC24V module is ideal for monitoring 24 V signals from devices such as pushbuttons, proximity sensors, and limit switches, delivering straightforward digital input collection for reliable machine control.
