Industrial Automation Solution – Allen-Bradley 1764-28BXB | MicroLogix 1500 Series
Where This Product Is Used
The Allen-Bradley 1764-28BXB MicroLogix 1500 Base Unit is engineered for demanding industrial environments where compact footprint and high I/O density are critical. Engineers specify this controller across a wide range of applications:
- Discrete Manufacturing Lines – Conveyor sequencing, part detection, and assembly station interlocking in automotive and electronics plants.
- HVAC & Building Automation – Chiller control, air-handling unit sequencing, and energy management in commercial facilities.
- Water & Wastewater Treatment – Pump station control, level monitoring, and dosing system automation.
- Food & Beverage Processing – Filling line control, batch sequencing, and CIP (Clean-In-Place) cycle management.
- Material Handling – Sortation systems, palletizer control, and AGV interface logic.
- OEM Machine Control – Standalone machine controllers for packaging, labeling, and inspection equipment.
Technical Specifications
| Part Number (SKU) | 1764-28BXB |
| Series | MicroLogix 1500 |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Total I/O Points | 28 (onboard) |
| Digital Inputs | 16 × 24V DC Sink/Source |
| Digital Outputs | 12 × Relay (Form A) |
| Communication Port | RS-232 (DH-485 / DF1) |
| Expansion Capability | Up to 8 I/O expansion modules |
| Power Supply | Requires 1764-LRP or 1764-LSP processor unit |
| Operating Temperature | 0 °C to 60 °C |
| Storage Temperature | -40 °C to 85 °C |
| Relative Humidity | 5% to 95% (non-condensing) |
| Enclosure Rating | IP20 (panel-mount) |
| Weight | Approx. 900 g |
| Programming Software | RSLogix 500 / Studio 5000 Logix Designer |
Why Engineers Specify This Model
- Proven MicroLogix 1500 Platform – Decades of field deployment across global industrial sites; extensive community knowledge base and legacy program compatibility.
- High Relay Output Density – 12 relay outputs in a compact base unit eliminate the need for external relay banks in many applications, reducing panel space and wiring cost.
- Flexible Expansion Architecture – Up to 8 expansion modules (analog, specialty, communication) allow the system to grow with application requirements without replacing the base controller.
- Dual Communication Modes – RS-232 port supports both DH-485 network and point-to-point DF1 protocol, enabling integration with SCADA, HMI, and legacy Allen-Bradley networks.
- Broad Processor Compatibility – Works with both 1764-LRP (standard) and 1764-LSP (enhanced) processor units, giving system designers flexibility in memory and feature selection.
- Wide Temperature Range – Rated 0–60 °C operating, suitable for uncontrolled industrial environments without additional cooling infrastructure.
Complete System Bill of Materials
The 1764-28BXB base unit requires a processor and power supply to form a complete MicroLogix 1500 system. A typical BOM includes:
- 1764-28BXB – Base Unit (this item) – 28-point I/O chassis
- 1764-LRP or 1764-LSP – Processor Unit (required, sold separately)
- 1764-24AWA / 1764-24BWA – Alternative base units if AC input or different I/O mix is needed
- 1769-IQ16 / 1769-OW16 – CompactLogix expansion I/O (if migrating to newer platform)
- 1747-UIC – USB-to-DH-485 interface cable for programming
- 2711P-T7C22D9P – PanelView Plus 7 HMI for operator interface (optional)
- 1606-XLP95E – 24V DC power supply for I/O field devices
Compliance & Industry Standards
- UL Listed (UL 508) – Industrial Control Equipment
- CE Marked – EMC Directive 2014/30/EU & Low Voltage Directive 2014/35/EU
- CSA Certified – C22.2 No. 142
- RoHS Compliant
- ATEX / IECEx: Not rated for hazardous locations; install in appropriate enclosure per local code
- IEC 61131-3 Ladder Logic programming standard supported via RSLogix 500
Quality Assurance & Sourcing
Every 1764-28BXB unit offered through Konmask.com undergoes a structured quality verification process before dispatch:
- Visual Inspection – Connector integrity, label legibility, and housing condition verified against OEM reference standards.
- Functional Pre-check – Power-on test and I/O point continuity check performed where applicable.
- Authenticity Screening – Part markings, date codes, and board-level characteristics cross-referenced against known-genuine samples.
- Secure Packaging – Anti-static bag + foam-lined carton; humidity indicator card included for long-haul shipments.
- Documentation – Certificate of conformance and inspection record available upon request.
How to Source This Part
- Add to Cart – Select quantity and proceed to checkout directly on this page.
- Request a Quote – For orders of 3+ units or project-based procurement, email support@konmask.com for volume pricing and lead-time confirmation.
- Urgent Requirement – Call or WhatsApp +0086 19859288691 for same-day response on critical spares.
- Cross-Reference Check – If you are unsure whether 1764-28BXB is the correct part for your application, share your existing PLC configuration or panel drawing and our engineers will verify compatibility.
Application-Specific FAQ
Q: Can the 1764-28BXB operate without a processor unit?
A: No. The base unit requires a 1764-LRP or 1764-LSP processor to function. The base unit provides the I/O chassis and power distribution; the processor provides CPU, memory, and communication.
Q: Is this unit compatible with RSLogix 500 and Studio 5000?
A: RSLogix 500 is the native programming environment. Studio 5000 Logix Designer does not support MicroLogix 1500 directly; use RSLogix 500 v8.0 or later for full feature support.
Q: How many expansion modules can be added?
A: Up to 8 expansion modules from the 1769 CompactLogix I/O family can be connected to the right side of the base unit, subject to power budget constraints of the processor selected.
Q: What is the difference between 1764-28BXB and 1764-28AWA?
A: The 1764-28BXB has 24V DC inputs and relay outputs (BXB = DC input / relay output). The 1764-28AWA has 120V AC inputs and relay outputs, suited for legacy AC field wiring environments.
Q: Is this a new or refurbished unit?
A: Please confirm with our team at the time of order. We supply both new-in-box and professionally refurbished units; all are quality-verified and carry our sourcing guarantee.
Q: Can you provide a datasheet or wiring diagram?
A: Yes. Contact support@konmask.com and reference part number 1764-28BXB. We will provide the Rockwell Automation publication 1764-UM001 User Manual and relevant wiring diagrams.
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