Allen-Bradley 1764-24BWA MicroLogix 1500 24-Point Controller – Obsolete MicroLogix 1500 Spare Part

Technical Dossier

Product Details And Specifications

Allen-Bradley 1764-24BWA MicroLogix 1500 24-Point Controller – Obsolete MicroLogix 1500 Spare Part

DriveKNMS reviews sourcing status and documentation for this model during RFQ handling before quotation.

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Solving the Discontinued Hardware Crisis

The MicroLogix 1500 platform was deployed extensively throughout the 1990s and 2000s in food & beverage, water treatment, material handling, and light manufacturing. Many of these installations remain operational today — not because of inertia, but because the control logic embedded in RSLogix 500 programs represents years of process tuning that cannot be trivially ported to a new platform.

The 1764-24BWA base unit is the physical foundation of every MicroLogix 1500 node. It houses the I/O terminations, power supply, and the backplane interface for the processor module. When this unit fails, the processor module (1764-LSP or 1764-LRP) becomes non-functional regardless of its own condition. There is no workaround. There is no firmware patch. The base unit must be replaced with an identical part number.

Facilities that have not pre-positioned spare 1764-24BWA units are exposed to a single-point-of-failure risk that can idle an entire production cell. The cost of one unplanned shutdown — lost throughput, emergency labor, expedited freight — typically exceeds the cost of maintaining a two-unit spare inventory by a factor of ten or more.

How to extend your MicroLogix 1500 asset life by 5–10 years without a platform migration:

Condition & Reliability Assurance

Sourcing discontinued hardware from the secondary market carries real risk. DriveKNMS applies a structured 5-step qualification process to every 1764-24BWA unit before it is offered for sale:

1. Visual and mechanical inspection. Full examination of the housing, terminal blocks, and backplane connector for physical damage, corrosion, or evidence of prior field failure.
2. Electrolytic capacitor assessment. Capacitors are the most age-sensitive components in any PLC base unit. Each unit is evaluated for capacitor bulging, leakage, and ESR degradation. Units with compromised capacitors are not offered as functional spares.
3. Pin and connector integrity check. All I/O terminal screws, backplane pins, and communication port contacts are inspected for oxidation, corrosion, and mechanical deformation.
4. Firmware and hardware revision verification. The hardware revision is documented and disclosed. Compatibility with 1764-LSP and 1764-LRP processor modules is confirmed prior to listing.
5. Functional power-on test. Where test infrastructure permits, units are powered and verified for basic operational status before dispatch review.

Condition is disclosed accurately on each unit. We do not represent refurbished units as new unless they meet new-equivalent standards. If you require a specific hardware revision or condition grade, state this in your inquiry.

Key Features for System Maintenance

• Drop-in replacement. The 1764-24BWA installs directly into an existing MicroLogix 1500 installation. No I/O rewiring, no new panel design, no changes to the existing RSLogix 500 program.
• No reprogramming required. The processor module retains the application program. Replacing the base unit does not erase or alter the control logic stored in the 1764-LSP or 1764-LRP.
• Avoids engineering reconstruction costs. A platform migration to CompactLogix or ControlLogix requires new hardware, Studio 5000 licensing, program conversion, I/O mapping, and full recommissioning. A spare 1764-24BWA eliminates all of that cost for the life of the existing installation.
• Maintains existing safety validation. In regulated industries, replacing a like-for-like component does not trigger a full revalidation cycle. Migrating to a new platform typically does.

Q: How is condition confirmed before quotation?
A: Available condition, photos, test records and documentation are checked according to the requested model and sourcing channel before a formal RFQ response.

How do I know the unit is genuine Allen-Bradley and not a counterfeit?
All units are inspected for authentic Rockwell Automation labeling, correct hardware revision markings, and genuine backplane connector construction. We do not source from regions or channels known for counterfeit industrial hardware. Documentation of origin is available on request.

Should I buy more than one unit?
For any production-critical MicroLogix 1500 node, holding a minimum of one spare 1764-24BWA per line is standard practice. If your facility runs multiple nodes, a centralized spare pool of two to three units is a reasonable and cost-justified position given current secondary market availability.

Can you source other MicroLogix 1500 components?
Yes. DriveKNMS maintains inventory across the MicroLogix 1500 family including processor modules, expansion I/O, and communication adapters. Contact us with your full bill of materials.