Allen-Bradley 1745-LP156 SLC 150 Programmable Controller

Allen-Bradley 1745-LP156 is a SLC 150 Processor Unit, part of the legacy SLC-150 family, designed for compact, fixed I/O control in older automation setups. This 32-point module provides 20 DC inputs (0–30 V DC) and 12 outputs: 10 triac outputs for AC switching and 2 hard-contact relay outputs for discrete signaling. It is powered from a dual-range AC supply (85–132 V or 170–265 V, 50/60 Hz), enabling operation across common North American and international mains. Onboard CMOS RAM stores user program data with about 1200 words of user memory, and the controller scans the logic with roughly 4 ms per cycle. The unit supports ambient operating temperatures from 0 to 60 °C and non-condensing humidity conditions of 5–95%, and is designed for rugged industrial environments. As a fixed CPU in the SLC-150 family, it is commonly used in legacy packaging lines, material handling skids, and general automation tasks where simple, reliable control is required.