Allen Bradley 1745-LP101 SLC 100 Processor Unit Programmable Controller Rockwell

Overview

The Allen-Bradley 1745-LP101 is a SLC 100 series programmable controller processor unit designed for dependable control and automation in compact industrial environments. This processor combines CPU, 16 I/O circuits, and integrated power supply in a single compact unit, making it ideal for retrofit and new automation projects where space is at a premium.

Key Features

• 16 Integrated I/O Points: 10 input terminals and 6 output terminals built into the processor unit
• Battery-Backed CMOS RAM: Preserves program and data during power loss without requiring separate backup modules
• Expandable Architecture: Support for additional I/O expansion units, analog input modules, and relay output modules for scaling control tasks
• Dual Programming Options: Compatible with both Pocket Programmer and PC-based programming interfaces
• EEPROM Support: Optional EEPROM memory module for program loading and storage

Technical Specifications

The 1745-LP101 operates reliably across standard industrial power conditions and includes robust memory architecture for dependable operation:

• Processor input power: 85–132 VAC, 50/60 Hz
• Input signal levels: 10–30 V DC/AC (on-state)
• Output voltage range: 10–250 VAC, 10–125 VDC
• Memory: Battery-backed CMOS RAM (program storage)
• I/O count: 16 total (10 inputs, 6 outputs)
• Expandable via I/O expansion units and analog modules

Typical Applications

The SLC 100 processor is well-suited for:

• Discrete manufacturing and packaging lines
• Food and beverage processing control
• Material handling and conveyor systems
• Building automation and HVAC control
• Small pump and motor control stations
• Retrofit and modernization of legacy automation systems

Compatibility & Replacements

The 1745-LP101 is part of the Allen-Bradley SLC 100 family, which has been broadly deployed across industrial facilities for decades. It is compatible with Rockwell Automation’s legacy programming tools and can be programmed using Pocket Programmer or personal computer-based development environments. For applications requiring greater memory, I/O density, or advanced communication, consider the SLC 500 series as a step-up replacement. The 1745-LP101 remains a cost-effective solution for small to medium-scale control applications and a reliable option for spare parts and system redundancy.