Overview
The Allen-Bradley 1747-L532 is a mid-range processor unit in the SLC 500 family, engineered by Rockwell Automation for discrete, process, and infrastructure control applications. As part of the SLC 5/03 series, this processor combines proven reliability with flexible I/O capacity, making it a trusted workhorse in manufacturing, packaging, and material-handling automation. The 1747-L532 provides ladder-logic programming through RSLogix 500 and integrates seamlessly into existing SLC 500 modular rack systems.
Key Features
- 16K words of user memory with battery-backed RAM for data retention across power cycles
- DH-485 and RS-232 communication ports for networking to other controllers and engineering workstations
- Support for up to 4096 I/O points across local and remote modules
- Fast program scan time of 1 millisecond per kiloword (1 ms/K)
- Advanced instruction set including trigonometric, PID, exponential, and floating-point math functions
- Keyswitch modes (RUN, REMOTE, PROGRAM) for safe operation and maintenance
- Flash PROM firmware with optional Flash EPROM memory module (1747-M13) for expanded storage
- UL listed, CE marked, and C-Tick compliant for global deployment
Technical Specifications
- Processor Series: SLC 500 / SLC 5/03
- Memory (User): 16K words
- Memory (Program): 16K words
- Maximum I/O Capacity: 4096 discrete inputs / 4096 discrete outputs
- Communication Ports: DH-485 (half/full duplex), RS-232 (point-to-point)
- Program Scan Time: 1 ms/K typical
- Power Supply Requirements: 24 VDC (nominal)
- Current Draw (5V): 0.5 Amps maximum
- Current Draw (24V): 0.175 Amps maximum
- Power Consumption: 2.9 Watts
- Mounting: SLC 500 modular rack system (slot 0)
- Certifications: UL listed, CE marked, C-Tick approved
- Operating Temperature Range: 0°C to 55°C
Typical Applications
The 1747-L532 is widely deployed in:
- Manufacturing and Assembly Lines: Coordinating motor drives, pneumatic actuators, and discrete I/O for production control
- Packaging Equipment: Controlling conveyors, labelers, and fill-level sensors
- Process Industries: Managing temperature, pressure, and flow control in batch or continuous processes
- Infrastructure Automation: Water treatment, HVAC, and building control systems
- Material Handling: Sorting, routing, and inventory tracking systems
- Legacy System Upgrades: Cost-effective processor replacement in existing SLC 500 racks without chassis redesign
Compatibility & Replacements
Compatible With
- SLC 500 modular chassis (1747-A2, 1747-A4, 1747-A7, 1747-A13)
- All SLC 500 discrete and analog I/O modules
- Communication modules (1747-CP3, 1747-KA, 1747-M1)
- Power supplies in the SLC 500 family
- DH-485 industrial networks and RS-232 serial connections
- RSLogix 500 programming software (versions 10.0 and later)
Replaces / Drop-In Replacement For
- 1747-L532 Series A through D (same form factor and pinout)
- Other SLC 5/03 processors in 16K memory class (verify firmware compatibility with your system integrator)
Works With
- Programming: RSLogix 500 (ladder logic editor)
- Communication Protocols: DH-485 (Allen-Bradley proprietary), RS-232
- Memory Expansion: 1747-M13 Flash EPROM module for additional program storage
- Integration: Compatible with third-party DH-485 gateway devices and serial terminal emulators
- Development Tools: MicroLogix and CompactLogix systems can exchange data via DH-485 networks
