Brand:Allen Bradley PLC Item No.:Allen Bradley 1764-28BXB Product Origin:USA Product Dimensions:138 × 168 × 87 mm Product Weight:3.0 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen Bradley 1764-28BXB is a MicroLogix 1500 base unit designed for industrial automation systems that require a robust combination of high-speed processing, mixed I/O capability, and expandable architecture. It integrates digital inputs, high-speed inputs, relay outputs, and transistor (FET) outputs within a single modular platform, making it a powerful solution for complex machine control and legacy system integration.
This model is especially valued in industrial environments where high-speed counting, precise timing control, and multi-signal processing are essential. Although it belongs to an earlier PLC generation, it remains widely deployed in long-life manufacturing systems due to its stability and broad I/O functionality.
Technical Specifications
Specification Item
Details
Product Brand
Allen Bradley
Model Number
1764-28BXB
Product Type
MicroLogix 1500 Base Unit / Controller Base
Series
MicroLogix 1500
Power Supply
20.4–30V DC
Integrated Inputs
16 total (8 standard + 8 high-speed 24V DC inputs)
Input Type
24V DC Sink/Source
Integrated Outputs
12 total
Output Configuration
6 Relay Outputs + 6 FET Transistor Outputs
High-Speed Capability
Up to 20 kHz high-speed inputs and outputs
Communication Port
RS-232 Serial Communication
Expansion Capacity
Up to 512 I/O points
Processor Compatibility
1764-LSP / 1764-LRP
Memory Support
1764-MM series modules
Operating Temperature
0°C to 55°C
Storage Temperature
-40°C to 85°C
Mounting Type
DIN rail / panel mount
Dimensions
Approx. 138 × 168 × 87 mm
Weight
Approx. 1.0–3.0 kg (depending on configuration/source variance)
Recommended Related Models
Related Model
Function
1764-LRP
MicroLogix 1500 Processor Module
1764-LSP
Standard Processor Variant
1764-RTC
Real-Time Clock Module
1764-MM1
Memory Module
1769-IF4
Analog Input Expansion
1769-OB16
Digital Output Expansion
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Industrial Applications
The 1764-28BXB is widely used in demanding industrial environments where mixed-signal processing and high-speed control are required within a single PLC platform.
Typical applications include:
High-speed packaging machinery
Conveyor synchronization systems
Industrial sorting and counting systems
Printing and labeling equipment
Material handling automation
Pump and motor control systems
OEM machine control panels
Legacy production line upgrades
Its high-speed I/O capability makes it particularly effective for motion-adjacent and timing-sensitive automation tasks.
Key Advantages
High-Speed Integrated Control
Supports fast input/output processing up to the kHz range, enabling precise timing and rapid response in industrial automation systems.
Mixed I/O Architecture
Combines relay and transistor outputs with standard and high-speed inputs, reducing the need for external signal conditioning modules.
Scalable Expansion System
Supports extensive I/O expansion, allowing it to adapt to larger automation architectures without replacing the base system.
Dual Output Flexibility
Relay outputs handle AC/DC loads while FET outputs enable faster switching for high-speed control applications.
Proven Industrial Reliability
Designed for long-term operation in harsh environments, maintaining stable performance in legacy and mission-critical systems.
Technical FAQs
1. What is the 1764-28BXB used for?
It is a MicroLogix 1500 base controller used for industrial automation and machine control applications requiring mixed I/O and high-speed processing.
2. Does it include built-in I/O?
Yes. It includes 16 inputs and 12 outputs with both relay and transistor output types.
3. What makes it different from standard PLCs?
It combines high-speed inputs/outputs, relay outputs, and FET transistor outputs in one base unit.
4. What communication interface does it support?
It includes an RS-232 serial communication port for programming and system communication.
5. Is it suitable for high-speed applications?
Yes. It supports up to 20 kHz high-speed input and output functions.
6. Can it be expanded?
Yes. It supports up to 512 I/O points through compatible expansion modules.
7. What processors are compatible?
It works with MicroLogix 1500 processors such as 1764-LSP and 1764-LRP.
8. Is the module still in production?
No. It is discontinued but still widely used in existing industrial systems.
9. What industries still use it?
It is common in manufacturing, packaging, OEM machinery, and legacy industrial automation systems.
10. Why is the 1764-28BXB still valuable today?
Because it offers a rare combination of high-speed I/O, mixed output types, and robust architecture that continues to support long-life industrial installations.
