PRODUCT INFORMATION
Product Overview
Revision scope: These specifications describe 1747-L543/B (Series B). Check the corresponding technical data before specifying another hardware series.
The Allen-Bradley 1747-L543 is an SLC 5/04 Processor for the SLC 500 system. This controller installs directly into Slot 0 of a modular SLC 500 chassis. It features 64K words of user memory with battery-backed RAM and flash backup. The unit provides communication via RS-232 on Channel 0 and Data Highway Plus on Channel 1.
The processor addresses up to 4,096 discrete inputs, 4,096 discrete outputs, and 480 analog points. It supports up to three local chassis totaling 30 I/O module slots. Standard ladder logic execution delivers a typical program scan time of 0.9 ms/K word. The bit instruction execution time is 0.37 microseconds with typical I/O scan time of 0.225 milliseconds. Status LEDs display operational conditions for CPU fault, run mode, battery health, and communications.
TECHNICAL DATA
Technical Specifications
These specifications describe 1747-L543/B (Series B). Check the corresponding technical data before specifying another hardware series.
| Parameter | Specification |
|---|
| Specification | Value |
|---|
| Product Family / Series | SLC 500 / SLC 5/04 |
|---|
| User Memory | 64K words total (60K program/data, 4K data only) |
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| Max Discrete I/O | 4,096 inputs / 4,096 outputs |
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| Max Analog I/O | 480 points |
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| Communication Ports | RS-232 (Channel 0), Data Highway Plus / DH+ (Channel 1) |
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| Supported Protocols | DF1 Full/Half-Duplex, DH-485, ASCII, DF1 Radio Modem, Modbus RTU Master |
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| Backplane Current Draw | 1,000 mA @ 5V DC / 200 mA @ 24V DC |
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| Typical Program Scan Time | 0.9 ms/K word |
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| I/O Scan Time | 0.225 ms (typical) |
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| Bit Execution Time | 0.37 µs |
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| Max Local I/O Chassis | 3 chassis / 30 I/O module slots |
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| Memory Backup | Battery-backed RAM with Flash EPROM backup |
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| Programming Instructions | 107 |
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| Operating Temperature | 0 to 60°C (32 to 140°F) |
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| Storage Temperature | -40 to 85°C (-40 to 185°F) |
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| Relative Humidity | 5 to 95%, non-condensing |
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| Operating Shock | 30G |
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| Weight | 0.99 lb (0.45 kg) |
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| Mounting | Chassis mount, Slot 0 of SLC 500 modular chassis |
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| Programming Software | RSLogix 500 (Ladder Logic) |
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| Status Indicators | Run, CPU Fault, Forced I/O, Battery Low, RS-232, DH+ LEDs |
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TECHNICAL INFORMATION
Order Information
| Revision Part # | Also known as | Reference Price |
|---|
| 1747-L543 Ser B | 1747-L543/B, Series B | USD 607.00, indicative (Used/Refurbished) |
| 1747-L543 Ser C | 1747-L543/C, Series C | USD 709.00, indicative (Used/Refurbished) |
| 1747-L543 Ser D | 1747-L543/D, Series D | USD 896.00, indicative (Used/Refurbished) |
Reference prices are observed third-party market prices for the stated revision, not a final Aituos quotation.
TECHNICAL INFORMATION
Features
- Provides 64K words total memory with 60K words for program and data storage.
- Features an RS-232 communication port on Channel 0 and DH+ on Channel 1.
- Executes bit-level logic instructions with a 0.37 microsecond execution speed.
- Controls up to 4,096 discrete I/O points and 480 analog points across three chassis.
- Utilizes battery-backed RAM with Flash EPROM memory backup capability.
TECHNICAL INFORMATION
Connections / Interfaces
- Channel 0 provides an RS-232 communication port.
- Channel 1 provides a Data Highway Plus (DH+) communication port.
- The module connects to the chassis backplane through Slot 0.
TECHNICAL INFORMATION
Installation Guidelines
- Install the unit only into Slot 0 of an SLC 500 modular chassis.
- Turn off system power before inserting or removing the processor module.
- Maintain an ambient operating temperature between 0 and 60 degrees Celsius.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure communication settings and ladder logic programs using RSLogix 500 software.
- Select Channel 0 protocol options including DF1, DH-485, ASCII, or Modbus RTU Master.
- Ensure the lithium battery is connected to prevent memory loss during power interruptions.
TECHNICAL INFORMATION
Compatibility
- Operates in modular SLC 500 chassis architectures.
- Supports configurations up to three chassis with 30 module slots.
- Communicates across Data Highway Plus networks and serial RS-232 connections.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSOperates in modular SLC 500 chassis architectures. Supports configurations up to three chassis with 30 module slots. Communicates across Data Highway Plus networks and serial RS-232 connections.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What communication channels are built into the 1747-L543?
The processor features an RS-232 port on Channel 0 and a Data Highway Plus port on Channel 1.
Where is the 1747-L543 installed within the chassis?
The processor installs into Slot 0 of an SLC 500 modular chassis.
What programming software does the 1747-L543 require?
The processor is programmed using RSLogix 500 ladder logic programming software.
What is the market reference price for the 1747-L543?
Observed market reference pricing is approximately USD 607.00. This figure is an indicative market reference price only and is not a final quotation.
