Digital Input module SM321

Description

This input module increases the number of inputs in the S7-300 controller from 8-64, depending on the module variation used. Apart from being compact, easy to use, and cost-effective, these modules are for isochronous mode use, for currents sourcing, or sinking.

The Siemens SM321 is an input module that enables the expansion for connecting standard switches for the S7-300 PLC controller.

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