The Siemens 6ES7 322-1BL00-0AA0, commonly referred to as SM322, is a 32-channel digital output module for SIMATIC S7-300 systems that provides 24 V DC outputs for field devices. Each output is rated for 0.5 A, with eight channels per group (four groups total) and a total module current capacity of 16 A. The unit uses a 40-pole backplane/field connector for wiring and bus connectivity, supporting reliable, scalable control in compact automation cabinets. With 32 outputs at 24 V DC, this module is designed to switch loads such as relays and other actuators in manufacturing and process-control applications.
