Allen Bradley 1747-L542 CPU Processor Unit Module

Overview

The Allen Bradley 1747-L542 is a reliable CPU processor unit for the SLC 500 PLC series. It provides fast logic execution, stable communication with I/O modules, and efficient program control for industrial automation applications. This module is ideal for production lines, process control, and other manufacturing systems requiring consistent performance.

General Information

Part Number: 1747-L542

Manufacturer: Allen Bradley

Brand / Country of Origin: Allen Bradley / United States

Series: SLC 500

Type: CPU Processor Unit Module

Mounting: Rack-mounted installation in SLC 500 chassis

Technology: Microprocessor-based PLC controller with integrated diagnostics and memory management

Power Specifications

Supply Voltage: 5 V DC via chassis backplane

Power Consumption: Approximately 5 W

Power Source: Backplane-powered design

Protection Features: Built-in overload and short-circuit protection

Status Indicators: LEDs for RUN, FLT, BATT, and communication activity

Communication & Interface

Communication Port: RS-232 serial interface

Network Support: Supports DH-485 network communication

Processor Function: Executes control logic and manages connected I/O modules

Diagnostics: Memory status monitoring, processor fault detection, and program scan supervision

Operator Interface: Front-panel LED indicators and removable memory module support

Reset Capability: Hardware and software reset available

Environmental

Operating Temperature: 0 °C to +60 °C

Storage Temperature: −40 °C to +85 °C

Humidity: 5% to 95% RH, non-condensing

Vibration Resistance: Suitable for industrial operating environments

Protection Rating: IP20 when installed in proper enclosure

Dimensions & Weight

Dimensions (L × W × H): 144.5 × 34.6 × 130.18 mm

Weight: Approximately 0.318 kg

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