1756-L55

• Lifecycle Status: Discontinued; general sales ended on December 31, 2007, and the last-time-buy deadline was December 31, 2008. • Memory Requirement: Requires a separate non-volatile memory board (such as M11, M12, M13, M16, M22, M23, or M24) to function. • Communication Port: Features an integrated RS-232 communication port. • Maximum Firmware: Supports up to Revision 16 (16.023) using RSLogix 5000. • Power Requirements: Consumes 1.23 to 1.25 Amps at 5.1V DC and 0.014 Amps at 24V DC on the backplane. • Recommended Migration: Rockwell Automation recommends upgrading to newer ControlLogix 1756 processor families (such as L6x or L7x series). • Availability: Sourced through surplus or industrial automation suppliers like DO Supply or marketplaces like Amazon and eBay.