Allen-Bradley 1745-LP151 SLC 150 Processor Unit

The Allen-Bradley 1745-LP151 SLC 150 Processor Unit is the CPU module for the SLC 150 programmable logic controller family, combining a processor with an integrated AC power path and fixed I/O in a compact backplane-friendly package. It provides 20 sinking inputs and 12 outputs (10 triac outputs and 2 relays), making it suitable for basic discrete-control and sequencing tasks in small automation applications. The unit is designed to operate from a single-phase AC supply with a wide input range of 85–132 VAC or 170–265 VAC at 50/60 Hz, drawing up to about 25 VA. When paired with the optional High Speed Input (HSI) module, the LP151 can count high-speed input signals up to 5 kHz, enabling faster event counting and timing on compatible applications. Cataloged as 1745-LP151, this processor unit is part of the SLC-150 ecosystem and serves as the central processing and I/O management component for legacy Allen-Bradley control systems that require a compact,低‑voltage-compatible processor with fixed I/O.