Siemens 6ES7 322-1BL00-0AA0 Programmable Logic Controller Module

Siemens SM 322 digital output module provides 32 galvanically isolated 24 V DC outputs rated at 0.5 A per channel for SIMATIC S7-300 installations. Part number 6ES7 322-1BL00-0AA0, this module plugs into the S7-300 backplane via a 40-pin interface and functions as a 32-channel digital output (DO) module. Each output is isolated and driven at 24 V DC, suitable for switching DC loads such as relays, contactors, or indicator devices. This module serves as an expansion for SIMATIC S7-300 controllers, enabling scalable decentralized I/O in automation systems. The SM 322 is designed to be wired to standard 24 V DC loads and, with its isolation between outputs and the backplane, helps protect the PLC from fault conditions while expanding the controller’s output capacity.