Allen-Bradley 1746-A4 C01 PLC

Allen‑Bradley 1746‑A4 C01 is a four‑slot modular chassis for the SLC 500 family, serving as the backplane that houses up to four 1746 I/O modules in a single rack. Catalog number 1746‑A4, this chassis is designed to be used with a separate power supply (such as the 1746‑P1) to power the slots, and it integrates with the broader 1746 lineup that includes A4, A7, A10, and A13 chassis variants. The enclosure dimensions are 17.7 cm × 17.1 cm × 14.5 cm and it weighs about 0.75 kg, with an operating temperature range of 0 to 60 °C, making it suitable for industrial environments. This 4‑slot rack is commonly used to organize and mount I/O modules in SLC 500 control systems, providing a compact, modular backbone for distributed I/O in automation projects.