Overview
The Allen-Bradley 1747-L532 is a proven SLC 5/03 processor module from the SLC 500 family, designed for mid-range industrial automation and process control. This processor is part of the SLC 500 platform, providing mid-range control and DH-485 networking capabilities for a wide range of automation applications. It is a small, simple processor with a wide range of applications such as small process control, material handling, and HVAC control, and contains a PLC-5 processor-based advanced instruction set. The 1747-L532 Series D variant offers reliable performance for retrofit and replacement installations in existing SLC 500 systems worldwide.
Key Features
- 16K Words User Memory: The processor has a memory capacity of 16K words for program storage and can handle up to 4096 discrete inputs and 4096 discrete outputs.
- Dual Communication Ports: Built-in DH-485 and RS-232 communication ports support both peer-to-peer and distributed SCADA applications.
- Fast Scan Performance: Fast program scan time of 1 ms/K with I/O scan time of 0.225 milliseconds.
- Extensive I/O Capacity: The processor has 16K words total user memory with 12K words for data/program and 4K words for data alone, supporting up to 4096 inputs, 4096 outputs, and 480 local analog I/Os.
- Battery-Backed RAM: The processor has battery backup for its RAM and is compatible with the Allen-Bradley 1747-M13 backup memory device.
- Multi-Chassis Support: Can manage up to three chassis within a single setup, providing up to 30 slots for additional modules.
Technical Specifications
Memory & Processing:
Total user memory of 16K words with 12K words for data/program and 4K words for data alone. I/O scan time is 0.225 ms with a 1 ms/K program scan rate.
I/O Capacity:
4096 input points and 4096 output points with an analog I/O count of 480.
Communication:
Built-in RS-232 port and DH485 communication port. The RS232 port can be configured as DF1 or DH485 for peer-to-peer applications, with default configuration as DF1 full-duplex at 19.2 Kbaud.
Power Consumption:
Maximum current is 0.5A at 5V DC and 0.175A at 24V DC. Hold-up time is 20 ms – 3 seconds after loss of power, with exact amounts depending on power supply loading.
Operating Environment:
The module operates correctly in ambient temperatures from 0 to 60 degrees Celsius.
Hardware:
Dimensions: 3.2 cm x 15.2 cm x 14.0 cm; Weight: 2.3 kg.
Typical Applications
- Process Control: Mixing, blending, batching, and small-to-medium scale manufacturing.
- Material Handling: Conveyor systems, packaging automation, and palletizing equipment.
- HVAC Control: Building automation for heating, ventilation, and air conditioning systems.
- Packaging & Labeling: High-speed line control requiring responsive processor performance.
- Distributed Control: Remote and standalone PLC applications networked via DH-485.
- Legacy System Upgrades: Drop-in replacement for worn or failed Series D processors in active SLC 500 installations.
Compatibility & Replacements
Compatible With
- SLC 500 modular chassis and I/O modules (1746 series)
- Allen-Bradley 1747-M13 Flash EPROM backup memory module
- RS-232 and DH-485 configured networks for peer-to-peer messaging
- RSLogix 500 programming software for ladder logic development
- DF1 and DH485 communication protocols
- 1761-NET-AIC converter for network interface conversion
Replaces / Drop-In Replacement For
- Earlier SLC 5/03 processor units (1747-L532 Series A, B, C)
- Worn, failed, or refurbished 1747-L532 modules in active systems
- Legacy SLC 5/02 processors where higher memory capacity is required (with firmware updates)
Works With
- RSLogix 500 — standard programming and documentation tool for SLC 500 family
- DH-485 networks — Allen-Bradley distributed highway communication protocol
- RS-232 point-to-point and modem-based connections
- DF1 full-duplex protocol for handheld or PC-based programming terminals
- SLC 500 expansion racks and remote I/O via communication modules
