Intelligent ASCII and Custom Control Processing for SLC 500 Systems
The Allen Bradley 1746-BAS Basic Module is a versatile intelligent communication and custom programming module designed for the SLC 500 automation platform. Developed to expand controller functionality beyond standard ladder logic operations, this module allows users to execute BASIC language programs for data handling, serial communication, custom calculations, and specialized machine control tasks.
Equipped with onboard processing capability and serial communication support, the 1746-BAS provides flexible integration with printers, barcode systems, weighing equipment, scanners, and external industrial devices. Its programmable architecture makes it highly valuable in applications requiring customized logic routines, protocol conversion, or advanced data manipulation within legacy automation systems.
Widely used in manufacturing and OEM automation projects, the module continues to support industrial facilities operating reliable SLC 500 infrastructures where specialized serial communication and custom processing remain essential.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Allen Bradley |
| Product Family | SLC 500 |
| Model Number | 1746-BAS |
| Module Type | BASIC Language Intelligent Module |
| Programming Language | BASIC |
| Processor Type | Embedded Microprocessor |
| Communication Ports | 2 Serial Ports |
| Serial Protocols | ASCII, DF1, User-defined |
| Port Types | RS-232 / RS-422 / RS-485 |
| Memory Capacity | Approx. 24 KB user memory |
| Power Supply | Via SLC chassis backplane |
| Backplane Current Draw | Approx. 0.5 A @ 5V DC |
| Compatible Chassis | 1746 SLC chassis series |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5–95% non-condensing |
| Mounting Type | Rack-mounted in SLC chassis |
| Dimensions | Approx. 145 mm × 35 mm × 142 mm |
| Weight | Approx. 0.35–0.50 kg |
Applications
The 1746-BAS module is commonly used in industrial systems requiring custom serial communication and advanced data processing functions beyond standard PLC instructions.
Typical applications include:
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Barcode scanner integration
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Industrial printer communication
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Weigh scale and batching systems
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ASCII protocol conversion
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Custom machine sequencing
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Data collection and logging systems
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OEM automation equipment
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Legacy serial device integration
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Specialized mathematical calculations
Its programmable BASIC environment provides flexibility for handling non-standard industrial communication requirements.
Advantages
Flexible Custom Programming
Supports BASIC language programming for advanced machine logic and custom automation routines.
Multi-Device Serial Communication
Enables communication with barcode readers, printers, scanners, and serial industrial devices.
Expanded SLC 500 Functionality
Adds intelligent processing capability beyond traditional PLC ladder logic operations.
Reliable Industrial Integration
Designed for stable operation within proven SLC 500 automation environments.
Protocol Conversion Capability
Supports integration between different serial communication standards and external equipment.
Efficient Legacy System Support
Provides practical connectivity solutions for older industrial devices still used in production facilities.
Technical FAQs
1. What is the main purpose of the 1746-BAS module?
It provides BASIC language programming and serial communication functionality for SLC 500 systems.
2. What programming language does the module use?
The module uses the BASIC programming language.
3. How many communication ports are included?
The module includes two serial communication ports.
4. What serial standards are supported?
It supports RS-232, RS-422, and RS-485 communication.
5. Can it communicate with barcode scanners and printers?
Yes. It is commonly used for integrating barcode readers, printers, and ASCII devices.
6. Does the module require its own power supply?
No. It receives power directly from the SLC chassis backplane.
7. What automation systems is it compatible with?
It is designed specifically for Allen Bradley SLC 500 systems.
8. Is the 1746-BAS still used in industrial facilities?
Yes. Many legacy automation systems continue using it for custom serial communication tasks.
9. Can users create custom communication protocols?
Yes. The module supports user-defined serial communication programming.
10. What industries commonly use the 1746-BAS?
Manufacturing, packaging, logistics, material handling, and OEM machinery industries commonly use this module.
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