1747-L40L | Allen-Bradley Programmable Logic Controllers

The Allen-Bradley 1747-L40L is a self-contained SLC 500 fixed hardware controller designed for standalone industrial machine control and small automation applications. Combining an internal 120/240 VAC line power supply, central processor, and fixed I/O layout in a single housing, the unit features 24 VDC sourcing inputs alongside 16 DC sinking outputs. Its integrated architecture simplifies panel wiring and provides reliable control without requiring a separate backplane chassis.

Integrated I/O and Control Capabilities

The 1747-L40L incorporates 40 embedded I/O channels. The input section consists of 24 24 VDC sourcing input points, which interface with sinking field devices. The output section provides 16 24 VDC sinking transistor outputs, enabling rapid switching and solid-state actuation for low-power DC loads.

Power Line and Hardware Architecture

Equipped with an internal AC power supply, the controller accepts a line voltage input of 120/240 VAC. The fixed hardware design houses the power conversion circuit, memory structure, processor engine, and terminal blocks within a unified, panel-mounted enclosure, eliminating the need for modular chassis assemblies.

Technical Parameters

Frequently Asked Questions

Q: What input type is integrated into the 1747-L40L controller?A: The controller features 24 VDC sourcing inputs, which require connection to sinking sensor or switch outputs.

Q: Does the 1747-L40L require a separate rack chassis or power supply? A: No, as a fixed hardware style unit, the controller incorporates its own CPU, 120/240 VAC power supply, and I/O terminals inside a standalone enclosure.