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

Allen-Bradley 1746-A7 SLC 500 7-Slot Rack PLC Chassis is the mounting backplane for the SLC‑500 modular I/O and processor modules, providing seven slots to house a mix of cards in a single chassis. The 1746-A7 is part of the SLC 500 family and is commonly used to extend or reconfigure existing SLC‑500 installations by adding I/O and interface modules across the seven available positions. It supports an operating temperature range of 0 to 60 C, storage temperatures from -40 to 85 C, and up to 95% relative humidity. External dimensions are approximately 171 mm tall, 113 mm wide, and 145 mm deep. For larger configurations, multiple 1746‑A7 chassis can be combined, typically up to three chassis to achieve about 30 slots in a single system.