Allen-Bradley 1747-L532 SLC 5/03 Processor 16KB Memory
Introduction:
SLC 5/03 processor with 16KB memory. Supports 4096 inputs and outputs. DH485 and RS-232 communication ports.
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Product Overview
Controller Design and Application
The Allen-Bradley 1747-L532 is an SLC 5/03 controller module for the SLC 500 Modular Hardware platform. This processor is small, simple, and pocket-sized for easy integration. It serves a wide range of applications including small process control, material handling, and HVAC control. Consequently, the 1747-L532 adapts to various industrial automation needs. The controller contains a PLC-5 processor-based advanced instruction set for complex logic.
Memory and I/O Capacity
The 1747-L532 processor provides 16K words of total user memory. Specifically, 12K words are available for combined data and program storage, while 4K words are dedicated to data alone. The controller supports up to 4096 inputs and 4096 outputs. Additionally, 480 local analog I/O points are available for analog control applications. Therefore, the 1747-L532 handles substantial I/O requirements without external expansion.
System Architecture and Chassis Configuration
This controller supports a maximum of 2 local I/O chassis with a total of 30 module I/O slots. The I/O scan time is an impressive 0.225 milliseconds. Program scan time is 1 millisecond per kiloword. Consequently, the 1747-L532 delivers fast I/O response for time-critical applications. The processor can operate stand-alone or be distributed throughout a system for SCADA applications.
Technical Specifications
General Specifications
Manufacturer: Rockwell Automation
Brand: Allen-Bradley
Part Number: 1747-L532
Series: SLC 500
Module Type: SLC 5/03 Processor
UPC: 10662468217887
Memory Specifications
| Parameter | Value |
|---|---|
| Memory Type | Battery Backed-RAM (standard) |
| Total User Memory | 16,000 Words (16 KB) |
| Data/Program Memory | 12,000 Words |
| Dedicated Data Memory | 4,000 Words |
| Backup Memory Option | 1747-M13 |
I/O Capacity
| Parameter | Value |
|---|---|
| Maximum Inputs | 4,096 |
| Maximum Outputs | 4,096 |
| Analog I/O | 480 |
| Local I/O Chassis | 3 (maximum) |
| Chassis Module Slots | 30 |
Performance Specifications
| Parameter | Value |
|---|---|
| Program Scan Time | 1 ms per kiloword |
| I/O Scan Time | 0.225 milliseconds |
| Bit Instruction Execution Time | 0.44 milliseconds |
Communication Specifications
The 1747-L532 includes two built-in communication interfaces.
| Port Type | Details |
|---|---|
| RS-232 Port | Configurable as DF1 or DH485 |
| DH485 Port | Peer-to-peer communication |
RS-232 Default Settings (DF1 Full-Duplex):
Handshaking: Disabled
Communication Rate: 19.2 Kbaud
Error Check: CRC
Duplicate Packet Detect: On
Parity: None
DH485 Default Settings:
Communication Rate: 19.2 Kbaud
Node Address: 1
Power Specifications
| Parameter | Value |
|---|---|
| Backplane Current (5 V DC) | 500 milliamps |
| Backplane Current (24 V DC) | 175 milliamps |
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Ambient Temperature | 0 to 60°C |
| Operating Shock | 30G |
| Intended Environment | Clean and dry industrial |
Battery Information
Battery Backup: Yes, RAM is battery-backed
Battery Model: 1747-BA
Battery LED Indicator: Yes (indicates battery power state)
Flash Backup Memory: Standard
Additional Capabilities
The 1747-L532 includes several advanced features.
Online programming
Flash memory upgrades
Floating-point math
Built-in real-time clock
Key-switch (selectable operating modes)
Calendar functions
Automatic program load from backup memory on power cycle
Instruction Set Supported
The 1747-L532 supports a comprehensive instruction set.
| Instruction Category | Examples |
|---|---|
| Basic | Bit, Timer, Counter |
| Comparison | Equal, Less Than, Greater Than |
| Math | Basic Math, Advanced Math, Trig |
| Move and Copy | Move, Copy, Bit Shift |
| Sequential | Sequencer, Jump, Subroutine |
| Data Handling | FIFO, LIFO, Messaging |
| Process Control | PID, STI |
Installation Guide
Follow these steps to install the Allen-Bradley 1747-L532 correctly.
Power Down Chassis: First, disconnect power from the SLC 500 chassis completely.
Select Slot: Next, choose the leftmost slot (typically slot 0) for the processor.
Insert Module: Then, slide the 1747-L532 firmly into the selected slot.
Secure Module: After that, engage the locking mechanism to hold the processor in place.
Connect Communication Cables: Meanwhile, attach RS-232 or DH485 cables as needed.
Apply Power: Finally, restore power and verify the processor status LED.
The 1747-L532 requires a properly sized power supply for the backplane. Therefore, calculate total backplane current before adding I/O modules. In addition, install a 1747-BA battery for RAM backup. Consequently, proper installation ensures reliable processor operation.
Package List
The package includes the following physical items.
Allen-Bradley 1747-L532 SLC 5/03 processor module (1 piece)
Product label with part number and specifications
Anti-static protective bag for safe transport
*Note: The 1747-BA battery is not included. Communication cables are sold separately. Programming software is not provided with this processor.*
Frequently Asked Questions (FAQ)
1. How much memory does the 1747-L532 have?
The Allen-Bradley 1747-L532 provides 16KB of total user memory (16,000 words). Therefore, 12K words are available for combined data and program storage. The remaining 4K words are dedicated to data alone. Consequently, the processor handles moderate-sized control programs comfortably.
2. What is the I/O capacity of the 1747-L532?
The Allen-Bradley 1747-L532 supports up to 4,096 inputs and 4,096 outputs. Additionally, 480 local analog I/O points are available. The processor supports up to 3 local I/O chassis with 30 module slots. Consequently, substantial I/O expansion is possible without network adapters.
3. What communication ports does the 1747-L532 have?
The Allen-Bradley 1747-L532 includes two built-in communication ports. These are an RS-232 port (configurable as DF1 or DH485) and a DH485 port. The RS-232 default configuration is DF1 Full-duplex at 19.2 Kbaud. Consequently, the processor connects to programming terminals and peer devices easily.
4. What is the scan time of the 1747-L532?
The Allen-Bradley 1747-L532 delivers a program scan time of 1 ms per kiloword. The I/O scan time is 0.225 milliseconds for fast response. Bit instruction execution completes in 0.44 milliseconds. Consequently, the processor handles time-critical applications effectively.
5. What battery does the 1747-L532 use?
The Allen-Bradley 1747-L532 uses the 1747-BA lithium battery for RAM backup. Therefore, program and data are retained during power loss. A battery LED indicator shows the battery's power state. Consequently, you receive advance warning when battery replacement is needed.
6. What backup memory options are available for the 1747-L532?
The Allen-Bradley 1747-L532 supports the 1747-M13 backup memory module. Therefore, you can burn the program to backup memory for automatic loading on power cycle. This prevents unwanted program deletion when the 1747-BA battery is drained. Consequently, program security is significantly enhanced.
7. What types of instructions does the 1747-L532 support?
The Allen-Bradley 1747-L532 supports a PLC-5 processor-based advanced instruction set. Therefore, instructions include Bit, Timer, Counter, Comparison, Basic Math, Move, Copy, and Bit Shift. Sequencer, Jump, Subroutine, Messaging, STI, FIFO, LIFO, PID, Advanced Math, and Trig instructions are also supported. Consequently, both simple and complex control logic can be constructed.
Related Accessories
Enhance your SLC 500 control system with these compatible parts.
Battery: Allen-Bradley 1747-BA for RAM backup
Backup Memory: Allen-Bradley 1747-M13 for program storage
Communication Converter: Allen-Bradley 1761-NET-AIC for DH485 connections
Programming Software: Allen-Bradley RSLogix 500 for configuration
I/O Chassis: Allen-Bradley 1746-A4, A7, A10, or A13 for module expansion
Always use genuine Allen-Bradley components with the 1747-L532. Therefore, third-party batteries may not provide the same life expectancy or compatibility. In addition, verify backplane current capacity before adding modules. Consequently, using authentic parts ensures optimal processor performance and system reliability.