Our Bulletin 1746 SLC™ I/O Modules are part of our SLC 500 control platform. Rockwell Automation announces that as of August 31, 2018, additional Bulletin 1746 I/O modules will be discontinued and no longer available for sale. Customers are encouraged to migrate to our Bulletin 5069 Compact I/O™ modules used with the Logix control platform. PLC (Programmable Logic Controller)