PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1764-LSP is a MicroLogix Processor Module engineered for MicroLogix 1500 systems. It installs directly into compatible base units including the 1764-24AWA, 1764-24BWA, and 1764-28BXB. The module delivers integrated memory partitioned into 3.65 KB user program storage and 4 KB user data. It executes a typical one-thousand word instruction program in approximately one millisecond.
This processor features one non-isolated RS-232 communication port supporting DF1, DH-485, Modbus, and ASCII protocols. System expansion allows up to sixteen Compact I/O modules to deliver a maximum of 512 points. Two built-in digital trim potentiometers provide rapid setpoint and timer adjustments across a 0 to 250 range. Optional backup memory modules and real-time clock units install into the processor faceplate.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Bus Current Draw | 380 MA |
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| Communication Port | 1; RS232 |
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| Communication Ports | DH-485, Modbus, DF1, and ACSII |
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| Communication Protocol | Channel 0: DF1, DH485, Modbus, ASCII |
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| Compatible Memory Module | 1764-MM1, 1764-MM2, 1764-MM3 |
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| Compatible Real Time Clock | 1764-RTC |
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| Digital Trim Potentiometers | 2 built-in |
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| Enclosure Type | IP20 |
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| Expansion I/O | 512 |
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| Function | Processor Unit |
|---|
| Heat Dissipation | 1.9 Watts |
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| Memory | 7.6 Kb |
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| Output Source | Relay Port and DC FET |
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| Power supply | MicroLogix Bus |
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| Product Lifecycle Status* | Discontinued/Obsolete |
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| Product Line | MicroLogix 1500 |
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| RS232 Topology | Point to point |
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| Support for removal under power | 28 |
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| Supported Base Units | 1764-AWA; 1764-BWA; 1764-BXB |
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| UPC | 611320023633 |
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| User Memory | Series B; 12K (8K Program; 4K Data) Series C: 14K (10K Program; 4K Data) |
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| Weight | 0.56 lbs (0.26 kg) |
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TECHNICAL INFORMATION
Features
- Integrated 7 KB memory architecture with user-configurable program and data allocations.
- Execution speed of approximately 1 ms per 1K words of ladder logic.
- One RS-232 serial port supporting DF1 full-duplex, DF1 half-duplex, DH-485, and Modbus RTU.
- Two integrated 3/4-turn digital trim potentiometers for setpoint modifications.
- Supports expansion configurations reaching up to 512 total discrete and analog I/O points.
- Accepts plug-in memory backup modules and real-time clock cartridges.
TECHNICAL INFORMATION
Applications
- Small machine automation requiring distributed serial connectivity and high-speed processing.
- Packaging and assembly stations interfacing with PanelView operator terminals via DF1 protocol.
- SCADA remote terminal units operating over Modbus communication links.
TECHNICAL INFORMATION
Connections / Interfaces
- Channel 0 non-isolated RS-232 serial port connects via 1761-CBL-PM02 to workstations or HMIs.
- Direct blind-mate interface links the processor to the MicroLogix 1500 base chassis.
- Integrated socket accepts 1764-MM or 1764-RTC accessory modules.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the processor directly into the dedicated compartment of an unpowered MicroLogix 1500 base.
- Ensure power is disconnected before seating or removing the module from the base unit.
- Maintain adequate clearance inside the control enclosure to facilitate convective thermal dissipation.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure controller parameters and memory allocation using RSLogix 500 software.
- Assign baud rate and protocol parameters to Channel 0 through the controller communication setup.
- Calibrate internal timer and counter values using the two physical trim potentiometers.
TECHNICAL INFORMATION
Compatibility
- Installs into MicroLogix 1500 base units 1764-24AWA, 1764-24BWA, and 1764-28BXB.
- Supports 1764-MM1, 1764-MM2, and 1764-MM3 memory modules.
- Accepts 1764-RTC, 1764-MM1RTC, 1764-MM2RTC, and 1764-MM3RTC clock hardware.
- Configured using Rockwell Automation RSLogix 500 programming software.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Declared discontinued by Rockwell Automation on June 30, 2017.
- Available primarily through specialized spare parts stock and surplus channels.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSInstalls into MicroLogix 1500 base units 1764-24AWA, 1764-24BWA, and 1764-28BXB. Supports 1764-MM1, 1764-MM2, and 1764-MM3 memory modules. Accepts 1764-RTC, 1764-MM1RTC, 1764-MM2RTC, and 1764-MM3RTC clock hardware. Configured using Rockwell Automation RSLogix 500 programming software.
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
Which base units support the 1764-LSP processor?
It operates with MicroLogix 1500 base models 1764-24AWA, 1764-24BWA, and 1764-28BXB.
What communication protocols does the built-in serial port support?
The RS-232 port supports DF1 full-duplex, DF1 half-duplex, DH-485, Modbus, and ASCII communications.
What is the reference market price for the 1764-LSP?
Observed market reference pricing is approximately $138 USD for refurbished units. This figure is an indicative market reference only, not a final quotation.
