Overview
The Allen-Bradley 1747-L524 is a Series C SLC 5/02 processor unit designed for the SLC 500 modular hardware family. This controller type offers 4 KB of user memory and serves as a cost-effective solution for process control and discrete automation tasks. The 1747-L524 supports analog, digital, scanner modules (including DeviceNet, ControlNet, and Universal Remote I/O), specialty, and intelligent I/O modules, making it versatile for retrofit and legacy system applications.
Key Features
- Maximum discrete I/O capacity of up to 4,096 inputs and 4,096 outputs
- Built-in DH-485 communication port for peer-to-peer networking and device integration
- Capable of executing Proportional + Integral + Derivative (PID) algorithms for closed-loop control
- Front panel LED indicators for monitoring CPU operating mode, CPU Fault status, IO Forcing, Communication status, and Battery Voltage
- User-replaceable battery with an estimated 2-year lifespan, open-enclosure design for chassis mounting
- Support for up to 480 analog I/O when using appropriate modules
Technical Specifications
- Program memory: 4K words (instructions)
- Discrete I/O capacity: 4,096 inputs and 4,096 outputs maximum
- Analog I/O support: Up to 480 analog I/O
- Communication port: DH-485
- Program scan time: Approximately 1.6 ms per 1,000 instructions
- Operating temperature: 0 °C to 60 °C
- Storage temperature: -40 °C to +85 °C
- Backplane current load: 350 mA at 5V DC, and 105 mA at 24V DC
- Single-slot module occupying Slot Zero (0) of the SLC 500 chassis
Typical Applications
The 1747-L524 is well-suited for industrial automation and process control tasks requiring reliable PLC functionality. Common applications include packaging machinery, material handling systems, discrete manufacturing, and facility automation requiring DH-485 networked communication. It is particularly valuable for system integrators and maintenance technicians performing legacy equipment upgrades or emergency replacements.
Compatibility & Replacements
Compatible With
- SLC 500 modular chassis (all sizes)
- Analog, digital, scanner, specialty, and intelligent I/O modules
- DeviceNet, ControlNet, and Universal Remote I/O scanner modules
- DH-485 networked systems
- Optional EEPROM backup modules (1747-BA battery and equivalents)
Replaces / Drop-In Replacement For
- Allen-Bradley 1747-L524 (all firmware revisions)
- Allen-Bradley 1747-L524C (Series C variant)
- Legacy SLC 5/02 processors requiring 4K memory configuration
Works With
- DH-485 communication protocol and networking
- 1747-PIC interface for DH-485 programming connections
- Optional EEPROM modules for saving and loading processor RAM data
- Not compatible with 1746-BLM or 1746-MPM modules
