1747-L542 SLC 5/04 Processor 32KB Allen-Bradley

Product Overview

The 1747-L542 is a powerful SLC 5/04 processor from Allen-Bradley. It belongs to the SLC 500 family. This unit handles up to 4096 discrete inputs and 4096 discrete outputs. It features 32 KB of battery-backed RAM. The processor supports 480 local analog I/O points. It operates in a modular chassis system. This processor includes integrated RS-232 and Data Highway Plus (DH+) ports. These ports enable communication with HMIs, SCADA systems, and other PLCs. Status LEDs show Run, CPU Fault, Forced I/O, Battery Low, RS-232, and DH+ activity.

Application Scenarios

This processor works well in medium-sized industrial applications. Use it for machine control, material handling, and process automation. It communicates easily with ControlLogix and CompactLogix platforms. The DH+ network allows messaging between multiple controllers. Factories use it for conveyor systems, packaging lines, and assembly stations. It also supports supervisory control and data acquisition systems.

Technical Specifications

The 1747-L542 has a program scan time of 0.9 ms per K word. Its I/O scan time is 0.225 milliseconds. The bit execution time is 0.37 milliseconds. It supports up to 3 local I/O chassis with 30 slots total. User memory is 32,000 words. The backplane current is 1 A at 5 VDC and 175 mA at 24 VDC. It operates from 0 to 60 degrees Celsius. The ambient relative humidity range is 5 to 95 percent non-condensing. It uses a 1747-BA battery for backup memory. The backup memory module is 1747-M13.

Installation & Maintenance Guide

Install the 1747-L542 in slot zero of any SLC chassis. Compatible chassis include 1746-A2, 1746-A7, 1746-A10, and 1746-A13. Ensure the system power supply is installed on the left side. Use the key switch to select the operating mode. Replace the backup battery when the Battery Low LED lights up. Keep the ambient temperature within the specified range. Regularly inspect the status LEDs for faults.

Packing List

Each package includes one 1747-L542 SLC 5/04 processor. It comes with a key for the mode switch. A user manual is included. The battery is pre-installed. The unit is protected in anti-static packaging. Shipping is via FedEx, UPS, or DHL.