Siemens 6ES7 321-1BH02-0AA0 SM321 Digital Input Module – S7/300 Series (Open Box)

Need a digital input module for your Siemens S7-300 PLC system?

This is a Siemens SM321 module, model number 6ES7 321-1BH02-0AA0.

It's in 'new open box' condition – meaning it's functionally perfect and like new, but the original box might be missing or it could have been used for a quick test.

It should include the usual accessories.

It's a genuine Siemens part, so you're getting reliable performance for your automation setup.

A great way to expand or repair your control system at a potential saving compared to a factory-sealed box.