Product Overview
The Allen-Bradley 1747-L552 is a high-performance SLC 5/05 processor module designed for the SLC 500 modular hardware platform. It combines substantial memory capacity with built-in Ethernet and RS-232 communication, making it a versatile choice for medium to large-scale industrial automation applications. With support for up to 4096 discrete inputs and 4096 discrete outputs, the 1747-L552 can handle complex processes while enabling seamless integration with enterprise-level systems.
Technical Specifications
The 1747-L552 delivers robust performance, as outlined in the table below. These specifications are directly from the manufacturer and ensure reliable operation in demanding environments.
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number/Catalog No. |
1747-L552 |
| Series |
SLC 500 |
| Module Type |
SLC 5/05 Processor |
| Inputs |
4096 |
| Outputs |
4096 |
| Analog I/O |
480 |
| Memory |
Up to 32 KB, Battery Backed-RAM |
| Program Scan Time |
0.9 ms/K |
| User Memory |
32,000 Words |
| I/O Chassis |
3 |
| Chassis Module Slots |
30 |
| I/O Scan Time |
0.225 milliseconds |
| Communication |
Ethernet, RS-232 |
| Backup Memory |
1747-M13 |
| Ambient Temperature |
0 to 60 degrees Celsius |
| SLC 5/05 Connections |
48 |
| Battery back-up memory |
Yes; 1747-BA |
| UPC |
10662072745585 |
Key Features & Benefits
-
High I/O Capacity: The 1747-L552 supports up to 4096 inputs and 4096 outputs, making it suitable for controlling multiple small processes or one large process.
-
Integrated Ethernet: Built-in Ethernet communication enables out-of-the-box vertical integration, simplifying connectivity with enterprise systems and supporting Industrial Internet of Things (IIoT) initiatives.
-
RS-232 Port: The 9-pin RS-232 port is ideal for local Human Machine Interface (HMI) communication, commonly installed on the same panel as the PLC.
-
Large Memory: With 32,000 words of user memory (28K for program/data and 4K for user data), the processor can handle complex programs and data logging.
-
Battery Back-up: The user-replaceable lithium battery provides an average of two years of memory retention, and the built-in capacitor allows at least 30 minutes of operation after battery disconnection.
Industry Applications
The 1747-L552 is engineered for medium to large-scale applications that require robust control and enterprise integration. Typical use cases include:
-
Manufacturing Lines: Coordinating multiple production cells with high I/O counts, the 1747-L552 manages sequential and batch processes efficiently.
-
Material Handling: With 4096 I/O points, the processor can oversee conveyor systems, sortation, and robotic workcells, ensuring synchronized operation.
-
Process Control: The analog I/O capacity (480 points) supports continuous processes such as temperature, pressure, and flow control, while Ethernet connectivity enables remote monitoring and data exchange.
Installation & Setup Guidance
When installing the 1747-L552, ensure the SLC 500 chassis is properly grounded and that power is turned off before inserting or removing the module. The processor mounts directly into a single slot and connects to the backplane. For Ethernet communication, the module is BOOTP enabled; configure the IP address via the BOOTP server or through the serial port. The RS-232 port allows point-to-point connection to HMIs or programming terminals. Always verify that the chassis power supply can handle the processor's current draw (1A at 5 VDC).
Maintenance & Reliability
Regular maintenance of the 1747-L552 is straightforward. Check the status LEDs periodically to monitor the processor's health. The lithium battery should be replaced every two years to ensure memory retention; when replacing, power down the processor and connect a new battery within 30 minutes to avoid data loss. Keep the ambient temperature within 0 to 60 degrees Celsius and relative humidity between 5% and 95% (non-condensing). Avoid exposing the module to excessive vibration or shock beyond specified limits.
Compatibility & Integration
The 1747-L552 is part of the SLC 500 family and works with all SLC 500 chassis and I/O modules. It supports up to 3 chassis with a maximum of 30 slots, allowing flexible system expansion. Communication options include Ethernet and RS-232; the processor also supports DH485, Data Highway Plus (DH+), Remote I/O, and DeviceNet via specialty modules or converters. The embedded Ethernet port supports up to 48 simultaneous connections, enabling integration with SCADA, MES, and ERP systems.
Selection Guide & Purchasing Advice
Before purchasing the 1747-L552, verify your system's I/O requirements and communication needs. Ensure you have the correct backup memory module (1747-M13) and battery (1747-BA) for long-term reliability. The processor is a critical component; consider redundancy if your application requires high availability. PLC Source PRO offers genuine Allen-Bradley 1747-L552 modules with fast shipping and competitive pricing, ensuring minimal downtime for your operations.