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

Siemens 6ES7322-1BL00-0AA0 is a SIMATIC S7-300 digital output module (SM 322) that provides 32 independently switched DC 24 V outputs, designed to drive loads such as relay coils and other 24 V devices from a PLC backplane. Each of the 32 outputs is optically isolated from the backplane, rated at 0.5 A per channel, with four isolated output groups sharing a total current of 4 A per group and 16 A per module. The device uses a single 40-pin interface to connect to the backplane and supports a load voltage range of 20.4 to 28.8 V DC, with a nominal 24 V DC operating voltage. Optical isolation between field wiring and the backplane enhances safety and reliability in automation cabinets, helping to prevent fault propagation across channels and groups, and making it a robust choice for distributed control of DC actuators in S7-300 systems.