Allen Bradley 1747-L542 Series B Processor Unit SLC 500 Operating Sys 1747-OS401

Available here is an Allen Bradley processor unit from Rockwell Automation.

Model 1747-L542
Series B
Rev 3

Operating System Information
1747-OS401 Series B FRN 7

Current Requirements 
1 amp @ 5 vDC
200 mA @ 24 vDC

We ship within 24 hours (but usually before)

If you have any questions, please do not hesitate to ask.