PRODUCT INFORMATION
Product Overview
Revision scope: These specifications describe 1747-L511/A (Series A). Check the corresponding technical data before specifying another hardware series.
The Allen-Bradley 1747-L511 SLC 500 Controller is an SLC 5/01 processor module. The unit provides 1K instructions of user program memory. It mounts directly into slot 0 of a 1746 modular chassis. The controller supports up to 30 local I/O module slots across three interconnected chassis. Total local capacity reaches a maximum of 960 digital points or 480 analog points.
Internal logic is retained by capacitor-backed RAM during brief power interruptions. Optional EEPROM memory modules provide non-volatile program retention. Compatible backup memory modules include the 1747-M1 and 1747-M2. Front indicators display Run, CPU Fault, Forced I/O, and Battery Low status. The backplane current draw requires 350 mA at 5V DC and 105 mA at 24V DC.
TECHNICAL DATA
Technical Specifications
These specifications describe 1747-L511/A (Series A). Check the corresponding technical data before specifying another hardware series.
| Parameter | Specification |
|---|
| Specification | Value |
|---|
| Processor Type | SLC 5/01, Series A |
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| User Memory | 1K instructions (maximum) |
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| Maximum Local Digital I/O | 960 points (absolute maximum) |
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| Maximum Local Analog I/O | 480 points |
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| Program Scan Time | 8 ms/K (typical) |
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| I/O Scan Time | 2.6 ms (typical) |
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| Communication Port | DH-485 (peer-to-peer; responds to messages only, cannot initiate) |
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| Remote I/O Support | Not supported |
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| Maximum Local I/O Chassis | 3 |
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| Maximum I/O Module Slots (Local) | 30 |
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| Memory Backup | Capacitor-backed RAM; optional EEPROM (1747-M1 or 1747-M2) |
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| Backplane Current Draw (5V DC) | 350 mA |
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| Backplane Current Draw (24V DC) | 105 mA |
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| Ambient Operating Temperature | 0 to +60°C (+32 to +140°F) |
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| Mounting | Slot 0 of 1746 modular chassis |
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| Status Indicators | Run, CPU Fault, Forced I/O, Battery Low LEDs |
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| Certifications | UL Listed (US and Canadian Safety Standards), CE, C-Tick |
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TECHNICAL INFORMATION
Order Information
| Revision Part # | Also known as | Reference Price |
|---|
| 1747-L511 Ser A | 1747-L511/A, Series A | USD 239.00, indicative (Used/Refurbished) |
| 1747-L511 Ser B | 1747-L511/B, Series B | USD 128.00–389.00, indicative |
Reference prices are observed third-party market prices for the stated revision, not a final Aituos quotation.
TECHNICAL INFORMATION
Features
- Provides 1K instructions of user memory for program execution.
- Mounts directly into slot 0 of any modular 1746 chassis.
- Delivers a typical program scan time of 8 ms per 1K.
- Includes diagnostic LEDs for Run, CPU Fault, Forced I/O, and Battery Low.
- Uses capacitor-backed RAM and supports optional 1747-M1 or 1747-M2 EEPROM modules.
- Supports up to 30 local module slots across three chassis.
TECHNICAL INFORMATION
Connections / Interfaces
- The module includes one DH-485 communication port.
- The DH-485 port responds to network messages but cannot initiate communications.
- Remote I/O connections are not supported on this unit.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the controller exclusively into slot 0 of the 1746 chassis.
- Maintain an ambient operating temperature between 0 and 60 degrees Celsius.
- Ensure power supply capacity covers 350 mA at 5V DC and 105 mA at 24V DC.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure hardware across up to three local chassis.
- Local expansion accommodates up to 30 modular I/O slots.
- Install an optional 1747-M1 or 1747-M2 EEPROM module for non-volatile backup.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1746 modular chassis.
- Compatible with 1746 local digital and analog I/O modules.
- Supports optional 1747-M1 and 1747-M2 memory backup modules.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The hardware design corresponds to the SLC 5/01 Series A release.
- Verify existing chassis slot allocation and hardware series prior to replacement.
TECHNICAL INFORMATION
Compliance and Certifications
- UL Listed for United States and Canadian safety standards.
- CE compliant for applicable European standards.
- C-Tick certified for Australian standards.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1746 modular chassis. Compatible with 1746 local digital and analog I/O modules. Supports optional 1747-M1 and 1747-M2 memory backup modules.
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 is the user memory capacity of the Allen-Bradley 1747-L511?
The 1747-L511 provides up to 1K instructions of user memory. Capacitor-backed RAM preserves user programs during power loss.
Can the 1747-L511 initiate messages over DH-485?
No. The DH-485 communication port operates as a responder node only and cannot initiate messages.
Where must the 1747-L511 be installed in a chassis?
The 1747-L511 controller must always be installed into slot 0 of a 1746 chassis.
What is the reference price for the 1747-L511?
Market reference pricing is approximately USD 239.00 for used or refurbished units. These figures are indicative market reference pricing only and are not a final quotation.
