Surplus Open Allen Bradley 1747-L40C C FRN 6 SLC 500 Fixed Processor Unit 40 I/O
Surplus Unit in OriginalOpen Box 1747-L40C Ser C FRN 6 1747-L40C/C. Allen Bradley SLC 500 Processor Unit 40 I/O Brick 1747-L4OC/C Date Varies. While many Allen Bradley / Rockwell Automation products will have firmware already installed, we makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application or not.