Overview
The Allen-Bradley 1747-L541 is an SLC 5/04 processor from the SLC 500 series, designed for reliable industrial automation control. Series C units feature 16K words of user memory and can manage up to 4096 input and 4096 output points, making them suitable for medium-sized automation systems. The processor delivers fast program execution with a 0.9 millisecond scan time and integrates built-in communication for seamless network connectivity.
Key Features
- 16K User Memory: Sufficient capacity for most industrial control applications
- High I/O Capacity: Supports up to 4096 inputs and 4096 outputs plus 480 analog I/O points
- Fast Scan Time: Typical program scan of 0.9 ms/K and I/O scan of 0.225 milliseconds for responsive control
- Dual Communication Ports: Built-in DH+ channel for high-speed messaging and RS-232 for serial devices
- Remote I/O Support: Enables distributed I/O architecture with remote racks
- Front Panel Keyswitch: 3-position selector for Run, Remote, and Program modes with LED status indicators (RUN, FLT, BATT, FORCE, DH+, RS-232)
Technical Specifications
- Processor Type: SLC 5/04 CPU Module
- Memory Options: 16K, 32K, or 64K words available
- User Memory (Series C): 16,000 words
- Flash Backup Memory: 1747-M13 module supports 64 KB
- Maximum I/O Capacity: 4096 input points and 4096 output points
- Analog I/O Support: Up to 480 analog I/O points
- Program Scan Time: 0.9 milliseconds per keyword (typical)
- I/O Scan Time: 0.225 milliseconds (typical)
- Communication Channels: DH+ and 9-pin RS-232
- Backplane Power Requirements: 1 Amp @ 5V DC, 200 mA @ 24V DC
- Selectable Timed Interrupt (STI): 1 millisecond
- Discrete Input Interrupt (DII): 0.5 milliseconds
- Operating Temperature: 0 to 60°C (32 to 140°F)
- Mounting: SLC 500 modular chassis
- Compatible Models: SLC 500 series; works with 1747-L542, 1747-L543, and other SLC 500 family processors
Typical Applications
- HVAC control systems
- SCADA (Supervisory Control and Data Acquisition) installations
- Material handling and conveyor automation
- Process control with distributed I/O
- Industrial machinery monitoring and sequencing
- Human-Machine Interface (HMI) integration with Allen-Bradley or third-party panels
Compatibility & Replacements
Compatible With
- SLC 500 modular rack chassis (2-slot and multi-slot configurations)
- SLC 500 input, output, and analog modules (1746-series)
- Remote I/O systems with communication adapters
- Data Highway Plus (DH+) networks
- RS-232 serial devices (printers, weigh scales, barcode readers)
- Allen-Bradley and third-party HMI platforms via DH+ or RS-232
- FactoryTalk View SCADA software
Replaces / Drop-In Replacement For
- 1747-L541 Series A and Series B units
- Earlier SLC 5/04 models with equivalent memory configurations
- Note: Verify memory size and series code match your system requirements before installation
Works With
- Allen-Bradley RSLogix 5 (for SLC 500 programming)
- Data Highway Plus (DH+) protocol for peer-to-peer and multi-drop communication
- DF1, DH-485, ASCII, and Modbus RTU communication protocols via RS-232
- DeviceNet pass-through capability
- Messaging with SLC 500, PLC-2, PLC-5, and ControlLogix processors
