Reliance 45C911 Shark XL 4-Slot Rack Assembly

The Reliance 45C911 Shark XL 4-Slot Rack Assembly is a four-slot backplane chassis for the Shark XL programmable controller family, designed to hold up to four Shark XL modules in a single rack and provide a common power and signal backplane. The part is cataloged as Reliance Electric 45C911 and appears in Shark XL literature as a four-slot rack, reflecting the historical AB/Baldor/Reliance lineage of Shark XL hardware. This rack sits alongside other Shark XL backplanes—3-slot, 5-slot, 6-slot and 7-slot variants (for example 45C910, 45C912, 45C913, 45C914)—to enable scalable module configurations in compact control architectures. Used with the corresponding Shark XL processor and I/O modules, it supports modular automation setups where space efficiency and straightforward expansion are priorities.