1747-L542 SER C REV7

Overview of Allen-Bradley 1747-L542 Series C Rev 7

The Allen-Bradley 1747-L542 Series C Rev 7 is a mid-range SLC 5/04 modular programmable controller in the SLC 500 family. It features 32 KB of battery-backed RAM user memory and can support up to 4096 discrete inputs and outputs and 480 analog I/O points. The controller includes integrated Data Highway Plus (DH+) and RS-232 communication ports for connecting with HMIs, SCADA systems, and other PLC platforms like PLC-5 and ControlLogix.

Key Features

• 32 KB user memory (battery-backed RAM) supporting extensive program and data storage
• Supports up to 4096 discrete I/O points and 480 analog I/O points
• Fast program scan time of approximately 0.9 ms per 1K instructions
• Fast I/O scan time of approximately 0.225 milliseconds
• Backplane current: 1 A at 5 V DC, 175 mA at 24 V DC
• Integrated DH+ and RS-232 communication ports for versatile networking
• Status LEDs for Run, CPU Fault, Forced I/O, Battery Low, DH+, and RS-232 communication
• Operating temperature range: 0 to 60 °C (32 to 140 °F) with humidity tolerance of 5–95% (non-condensing)
• Shock resistance: 30 g operational; vibration resistance: 2.5 g at 57–2000 Hz
• Open-style enclosure, designed to be installed in SLC 500 chassis slots

Technical Specifications

Applications

The 1747-L542 Series C Rev 7 processor module is ideal for medium to large industrial automation projects requiring extensive I/O and communication capabilities. It is commonly used in manufacturing control, process management, and integration with higher-level supervisory systems.