Siemens 6ES7 322-1HH01-0AA0 Programmable Logic Controller Module

Siemens 6ES7 322-1HH01-0AA0 is a SIMATIC S7-300 digital output module (SM322) with 16 relay outputs, designed to interface a PLC with external loads through relay contacts. This 16-channel DO module plugs into the S7-300 backplane and provides relay contacts for each output channel, enabling software-controlled switching of connected devices. The part number identifies this specific SM322 relay output module within the SIMATIC S7-300 family, and it is used to expand a controller's ability to drive loads such as relays, contactors, valves, or other field devices. It is intended for use with compatible SIMATIC S7-300 CPUs and I/O backplanes that support SM322 modules.