Allen-Bradley 1747-L552 | SLC 5/05 Processor 32KB Ethernet
Introduction:
Allen-Bradley 1747-L552 SLC 5/05 Processor. 32KB memory with Ethernet and RS-232. Handles 4096 I/O points for medium to large applications.
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Product Overview
The Allen-Bradley 1747-L552 is an SLC 5/05 processor for the SLC 500 modular hardware platform. This controller provides 32KB of battery-backed RAM memory. It features built-in 9-pin RS-232 and Ethernet communication ports. The Allen-Bradley 1747-L552 handles 4096 discrete I/O and 4096 remote I/O points. Users trust this processor for medium to large scale applications with enterprise integration needs.
Technical Specifications
The 1747-L552 delivers powerful processing with extensive I/O capacity. Below are the complete technical details.
General Specifications
Manufacturer: Rockwell Automation for industrial control reliability.
Brand: Allen-Bradley for SLC 500 compatibility.
Part Number: 1747-L552 for precise identification.
Series: SLC 500 programmable controller family.
Module Type: SLC 5/05 Processor.
UPC: 10662072745585 for universal product identification.
Slot Occupancy: Single slot processor.
Chassis Mounting: Directly connects to SLC 500 backplane.
Enclosure Type: Open-type enclosure mounted via chassis.
Dimensions: 145 x 35 x 142 millimeters.
Memory Specifications
User Memory: 32,000 Words (32 KB).
Memory Type: Battery Backed-RAM.
Data/Program Memory: 28K words.
User Data Memory: 4K words.
Battery: 1747-BA user-replaceable lithium battery.
Battery Life: Approximately 2 years.
Backup Memory: 1747-M13 flash backup.
Capacitor Backup: Runs for at least 30 minutes with battery disconnected.
Battery Reconnection Window: Within 30 minutes to avoid data loss.
I/O Capacity
Discrete I/O Capacity: 4096 Inputs and 4096 Outputs.
Remote I/O Capacity: 4096 Inputs and 4096 Outputs.
Analog I/O Capacity: 480 points.
I/O Chassis: Up to 3 chassis.
Chassis Module Slots: Up to 30 slots total.
Programming Instructions: Supports up to 107 instructions.
Performance Specifications
Program Scan Time: 0.9 ms per K (0.9 milliseconds/K).
I/O Scan Time: 0.225 milliseconds.
XIC Bit Execution: 0.37 µs.
Program Scan Hold-Up Time: 20 ms to 3 seconds (depends on power supply loading).
Communication Specifications
Embedded Ethernet Port: For networked applications.
Embedded RS-232 Port: 9-pin for peer-to-peer communication.
SLC 5/05 Connections: Up to 48 incoming or outgoing connections.
Outgoing Connection Rule: One connection per destination node.
MSG Instruction Sharing: Multiple MSG instructions share the same connection to the same destination.
BOOTP Enabled: Ethernet configuration support.
Proprietary Protocols (Other SLC): DH485, DH+, Remote I/O, DeviceNet (require specialty modules).
Ethernet Advantage: Out of the box ready for vertical integration.
Power and Current Specifications
Maximum Input Current at 5V DC: 1A.
Maximum Input Current at 24V DC: 0A.
Power Off Requirement: Power must be turned off when adding or removing a module.
Environmental Specifications
Operating Temperature: 0 to 60 degrees Celsius.
Storage Temperature: -40 to 85 degrees Celsius.
Relative Humidity: 5 to 95% non-condensing.
Operating Vibration (5-57 Hz): 0.015 inches peak-to-peak displacement.
Operating Vibration (57-2000 Hz): 2.5G acceleration.
Operating Shock: 30G.
Status and Diagnostics
Status LEDs: For monitoring current processor state.
RS-232 Port: Classic port ideal for HMI communication.
RS-232 Distance Limitation: Limited coverage (panel-mounted HMI typical).
Application Suitability
Ideal Use: Medium to large scale applications.
Integration Focus: Machine level to enterprise level integration.
IIoT Ready: Practical integration features for Industrial Internet of Things.
Installation Guide
Follow these steps to install the Allen-Bradley 1747-L552 correctly.
Power Down the Chassis: Turn off all power to the SLC 500 rack.
Locate Processor Slot: Insert processor in leftmost slot (typically slot 0).
Insert the Processor: Slide the 1747-L552 into the slot carefully.
Secure the Module: Lock using the retaining clips.
Connect Ethernet Cable: Attach RJ45 cable to Ethernet port.
Connect RS-232 Device: Wire HMI or programming terminal to 9-pin port.
Install Battery: Ensure 1747-BA lithium battery is connected.
Verify Backup Memory: Install 1747-M13 flash backup if needed.
Apply Power: Turn on the backplane power to the chassis.
Configure Ethernet: Use BOOTP or assign IP address.
Download Program: Transfer user program to 32KB memory.
Set Up I/O Chassis: Connect up to 3 chassis with 30 total slots.
Configure Remote I/O: Set up 4096 remote inputs and outputs as needed.
Monitor Status LEDs: Verify proper processor operation.
Test Scan Times: Confirm 0.9 ms/K program scan and 0.225 ms I/O scan.
Installation Notes
Power must be off when adding or removing any module.
Battery must be reconnected within 30 minutes to avoid RAM data loss.
The capacitor runs for at least 30 minutes with battery disconnected.
Outgoing connections are limited to one per destination node.
The RS-232 port has limited distance for HMI communication.
Packaging List
This unit ships as a new and original product.
Allen-Bradley 1747-L552 SLC 5/05 Processor
1747-BA lithium battery (pre-installed)
Product data sheet with configuration guide
Anti-static factory packaging bag
Frequently Asked Questions (FAQ)
1. What is the memory capacity of the 1747-L552 processor?
The Allen-Bradley 1747-L552 provides 32KB (32,000 words) of battery-backed RAM. Memory includes 28K words for data/program and 4K words for user data.
2. How many I/O points does this SLC 5/05 processor support?
The 1747-L552 supports 4096 discrete inputs and 4096 discrete outputs. It also handles 480 analog I/O points and 4096 remote I/O points.
3. What communication ports are built into the 1747-L552?
The Allen-Bradley 1747-L552 includes an embedded Ethernet port and a 9-pin RS-232 serial port. The RS-232 port is ideal for panel-mounted HMI communication.
4. What is the program scan time for this processor?
The 1747-L552 has a typical program scan time of 0.9 milliseconds per K of memory. I/O scan time is 0.225 milliseconds. XIC bit execution is 0.37 µs.
5. How long can the processor retain memory with the battery disconnected?
The Allen-Bradley 1747-L552 has a capacitor that runs for at least 30 minutes with the battery disconnected. Reconnect the battery within 30 minutes to avoid RAM data loss.