Allen-Bradley 1785-L40B PLC-5 Processor Module

The Allen-Bradley 1785-L40B PLC-5 Processor Module is a chassis-mounted PLC-5/40 CPU for industrial automation, delivering medium-capacity program memory and robust processing power that supports reliable, deterministic control across mid-size PLC-5 applications. It supports Data Highway Plus (DH+) and Remote I/O, with optional Ethernet via compatible modules, enabling integration into plant-wide control networks and synchronized data exchange across PLC-5 I/O devices, field I/O, and remote racks. Compatible with RSLogix 5 programming software and designed to coordinate PLC-5 I/O systems, this processor finds use in manufacturing lines, process control, material handling equipment, power generation facilities, and other industrial environments that require dependable, scalable PLC control. Operating temperature ranges from 0°C to 60°C, and common replacements in legacy PLC-5 systems include the 1785-L80B, 1785-L60B, and 1756-L61, helping simplify retrofits and system upgrades.