Siemens 6ES7 322-1HH01-0AA0 Digital Output Module

Siemens 6ES7 322-1HH01-0AA0 is a 16-channel digital output module designed for the SIMATIC S7-300 automation platform. This DO module uses relay-type outputs, delivering 16 independent contacts rated for 2 A per channel to switch external devices such as solenoids, contactors, indicators, and similar loads, while isolating the control logic from load circuits. The 6ES7 322-1HH01-0AA0 variant specifically identifies 16x Relay outputs with a 2 A contact rating (DO16xRelay/2A), making it suitable for medium-current switching tasks in automated systems. As part of the Siemens SIMATIC ecosystem, the module plugs into an S7-300 rack and communicates with the CPU and surrounding I/O modules via the S7 backplane bus, enabling synchronized control across an automation cell. The 1HH01-0AA0 suffix denotes the device revision, and this module is commonly used when higher-output capability is required from a single DO module without resorting to multiple smaller-output cards.