Allen-Bradley 1746-A7 SLC 500 7-Slot Chassis Rack

The Allen-Bradley 1746-A7 is a SLC-500 seven-slot chassis that provides the backplane and mechanical frame for CPU and I/O modules in mid-range SLC-500 automation setups. This 7-slot backplane supports a maximum backplane current of up to 10 A at 5 V DC and up to 2.88 A at 24 V DC, enabling a variety of processor, I/O, and communications modules to operate together within a single enclosure. Dimensions are approximately 171 mm high, 113 mm wide, and 145 mm deep, and the unit is specified for operating temperatures from 0 to 60 C and storage temperatures from -40 to 85 C, with a relative humidity rating up to 95%. In typical configurations, the CPU or network adapter occupies slot 0, with other I/O and expansion modules filling the remaining slots; the chassis is intended to be used as part of the SLC System’s modular hardware, delivering a compact, scalable foundation for industrial control tasks. The 1746-A7 chassis is designed to accommodate diverse SLC-500 modules, providing a consistent backplane and mechanical form factor for reliable installation in control panels and machines.