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Help CenterAllen-Bradley 1747-DCM is a SLC 500 Direct Communication Module
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As a supplier with over a decade of experience in the industrial automation components market, Rossonix Co., Limited is pleased to offer the Allen-Bradley 1747-DCM Direct Communication Module. This module represents a critical link in legacy SLC 500 control systems, facilitating reliable data exchange. With an annual export value between US$5-10 million and a presence across global markets from North America to Asia, we understand the importance of maintaining operational continuity for our clients. This module is a key component for system integrators and plant managers looking to support or upgrade existing installations.
The Allen-Bradley 1747-DCM module is engineered to provide a direct communication channel for the SLC 500 programmable logic controller family. It serves as a dedicated hardware interface, enabling the SLC processor to communicate with external devices such as operator terminals, barcode readers, weigh scales, and other serial devices without consuming the processor's communication port. This functionality is crucial for expanding system capabilities and integrating peripheral equipment into a cohesive automation solution.
Key Features and Technical Specifications:
- Dedicated Communication Path: Offloads serial communication tasks from the main processor, freeing up the primary communication port for programming, networking (DH-485, DH+), or other critical functions.
- Multi-Protocol Support: Designed to handle various serial communication protocols commonly used in industrial settings, enhancing compatibility with a wide range of third-party devices.
- Backplane Integration: Installs directly into the SLC 500 chassis, drawing power and communicating with the processor via the high-speed backplane. This ensures stable, low-latency data transfer compared to external adapters.
- Configuration Flexibility: Communication parameters (baud rate, parity, data bits, stop bits) are typically configured through the SLC 500 programming software (RSLogix 500), allowing for easy setup and integration into the control program.
- Robust Industrial Design: Built to withstand the electrical noise, vibration, and temperature variations typical of industrial environments, ensuring long-term reliability.
Primary Benefits for Your Operation:
- System Expansion: Enables connection of additional serial devices without requiring a hardware upgrade to a controller with more built-in ports.
- Cost-Effective Legacy Support: Provides a vital spare part for maintaining existing SLC 500 systems, helping to extend their service life and protect prior capital investments.
- Simplified Integration: Offers a native, Rockwell Automation-supported method for integrating serial devices, often requiring less custom coding than alternative solutions.
- Improved Data Handling: By dedicating a module to serial communication, it can improve the overall responsiveness and scan time of the main SLC processor.
Common Application Scenarios:
- Adding a serial printer for production reports or labels in a packaging line.
- Connecting a serial-based HMI (Human-Machine Interface) or message display.
- Interfacing with specialized test or measurement equipment that outputs data via RS-232/422/485.
- Creating a link to an older supervisory system or data logger.
Important Considerations & Compatibility:
It is essential to verify compatibility with your specific SLC 500 processor model and chassis. The 1747-DCM is a discontinued product by Rockwell Automation. We supply this module from available inventory for legacy system support. For new projects, we recommend consulting with us about modern communication alternatives, such as enhanced communication modules for newer ControlLogix or CompactLogix platforms, which offer superior performance and future availability.
| Feature | Description |
|---|---|
| Module Catalog Number | 1747-DCM |
| Compatible Controller Family | SLC 500 Series |
| Communication Port Type | Serial (RS-232 / RS-422 / RS-485) |
| Mounting | SLC 500 Chassis Slot |
| Primary Function | Provides an additional serial channel for device communication |
| Typical Configuration Method | RSLogix 500 Programming Software |
Rossonix Co., Limited brings reliability to your supply chain. Established in 2011 and holding ISO9001/9000 certifications for quality management, we operate with a commitment to professional standards. Our logistics network, shipping from major ports like Shenzhen and Hong Kong, ensures efficient delivery to our diverse main markets, including North America, Europe, and Asia. For facilities relying on the robust SLC 500 platform, securing genuine or high-compatibility communication modules is crucial for minimizing downtime. We provide this critical component to help maintain your system's integrity. Contact us today to discuss your requirements, check current availability for the 1747-DCM, or explore upgrade paths for your automation infrastructure.
Frequently Asked Questions (FAQ)
Q1: Is the Allen-Bradley 1747-DCM module still manufactured by Rockwell Automation?
A1: No, the 1747-DCM has been discontinued by the original manufacturer. It is considered a legacy or obsolete part. We source these modules from existing stock to support customers who need to maintain or repair their operational SLC 500 systems.
Q2: What is the main purpose of adding a 1747-DCM module to my SLC 500 system?
A2: Its primary purpose is to add an extra, dedicated serial communication port (RS-232/422/485) to your controller. This allows you to connect additional serial devices without using the processor's built-in port, which is often reserved for programming or network communication.
Q3: Which SLC 500 processors and chassis is the 1747-DCM compatible with?
A3: The module is designed for use with the standard SLC 500 fixed and modular controllers. However, compatibility should be confirmed with your specific processor model (e.g., SLC 5/01, 5/02, 5/03, 5/04, 5/05) and the chassis slot availability. It is not compatible with MicroLogix platforms.
Q4: How do I configure the communication settings for the 1747-DCM?
A4: Configuration is typically done within the RSLogix 500 programming software. You would need to add the module to the I/O configuration of your project and set the desired communication parameters (like baud rate and protocol) in the module's configuration screen.
Q5: Can this module communicate on Ethernet/IP networks?
A5: No, the 1747-DCM is strictly a serial communication module. For Ethernet/IP connectivity with SLC 500 systems, you would require a different module, such as a 1747-AENTR EtherNet/IP Adapter, or consider upgrading to a newer controller platform that supports Ethernet natively.
Q6: Do you offer any warranty or testing on these discontinued modules?
A6: As a trading company supplying legacy components, we conduct basic functionality checks on our inventory. Specific warranty terms and testing documentation can be provided upon request and are detailed in our commercial terms. We recommend testing the module in your application upon receipt.
Q7: What are my options if I need modern communication capabilities for a new project?
A7: For new installations, we strongly advise considering Rockwell Automation's current-generation controllers like CompactLogix or ControlLogix, which offer integrated and modular Ethernet and serial communication options with better performance and long-term support. We can provide information on these modern alternatives.
Q8: How can I be sure this module will work with my existing third-party serial device?
A8: Successful integration depends on matching the communication protocol (e.g., DF1, ASCII) and electrical interface (RS-232 vs. RS-422/485). You will need to ensure your device's protocol is supported by the SLC 500's instruction set (like AWT and ARD instructions for ASCII) and that you have the correct cabling. Providing your device's manual can help us advise on compatibility.
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