Overview
The Allen-Bradley 1747-L541 is an SLC 5/04 processor module within the SLC 500 series from Rockwell Automation. This unit provides 16,000 words of user memory with 4096 inputs and 4096 outputs, plus 480 analog I/O capability. The processor delivers a program scan time of 0.9 milliseconds and I/O scan time of 0.225 milliseconds, enabling responsive control for medium to large industrial applications including packaging, material handling, HVAC, and SCADA systems.
Key Features
- High-performance processor enhanced with faster communication and shorter program execution time
- Built-in DH+ channel supporting extended messaging capabilities and high-speed communication
- RS-232 channel supporting DF1 radio modem, DH-485, ASCII, and Modbus RTU communications
- Front-panel keyswitch to select different program modes
- Backup flash memory for 64,000 words
- Advanced math instructions and support for remote I/O, DeviceNet pass-through, and indirect addressing
Technical Specifications
The 1747-L541 delivers industrial-grade performance with flexible memory configuration and robust communication architecture. Power requirements: 1 Amp at 5 Volts DC from the backplane, plus 200mA at 24V DC. The unit mounts in any standard SLC 500 chassis and includes battery-backed CMOS RAM to preserve program and data during power loss.
Typical Applications
- Manufacturing and assembly line automation
- Material handling and packaging systems
- HVAC control and building management
- SCADA and distributed I/O control
- Process automation requiring fast scan times and high I/O density
- Systems requiring DH+ peer-to-peer messaging with other legacy controllers
Compatibility & Replacements
Compatible With
- SLC 500 chassis platforms (1747 series modular hardware)
- DH+ messaging with SLC 500, PLC-2, PLC-5, and ControlLogix processors
- Remote I/O and DeviceNet networks
- SLC 500 I/O modules and analog modules
- Memory module 1747-M13 Series C OS401 or later (supports up to 64K backup)
Replaces / Drop-In Replacement For
The 1747-L541 Series C is the standard replacement for earlier 1747-L541 units and is compatible with other SLC 5/04 variants (1747-L542, 1747-L543) where memory and I/O requirements align. Verify exact compatibility with your system integrator before ordering.
Works With
- RSLogix 500 programming software
- DH+ (Data Highway Plus) networks
- DF1 serial communication protocol
- DH-485 and ASCII serial interfaces
- Modbus RTU master/slave communication
- Allen-Bradley operator interface panels and HMIs
