Product Details
Product Overview
The Allen-Bradley 1747-BSN serves as the critical hardware interface for creating redundant controller systems within the SLC 500 platform. This Backup Scanner Module enables a high-availability "hot-backup" configuration, allowing a secondary processor to take control of Remote I/O and DH+ networks if the primary controller fails. We provide this module as 100% Brand New and Original, ensuring your critical infrastructure maintains maximum uptime without the risks associated with used legacy hardware.
Technical Specifications
| Parameter | Specification Details |
| Module Type | Backup Scanner Module |
| Compatible Processors | SLC 5/02, 5/03, 5/04, 5/05 |
| Backplane Current (5V DC) | 800 mA |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Communication Cable | Belden 9463 (Blue Hose) |
| Terminations | 6-Pin Phoenix Connector |
| System Placement | Standard 1746 I/O Chassis Slot |
| Shipping Weight | 1.00 lbs (0.45 kg) |
Engineering Advantages
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High-Speed Fault Detection: The 1747-BSN continuously monitors the health of the primary SLC processor. Upon detecting a processor fault or power loss, the module initiates a high-speed switchover to the backup rack, maintaining control over the Remote I/O network with minimal interruption to the process.
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Network Integrity Maintenance: By utilizing the standard Belden 9463 "Blue Hose" cable, the 1747-BSN bridges the communication gap between primary and secondary chassis. It synchronizes data across Data Highway Plus (DH+) and Remote I/O links, ensuring the standby controller possesses the most recent process variables.
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Simplified Redundancy Architecture: This module eliminates the need for complex, third-party failover hardware. It integrates directly into the standard 1746 chassis, allowing engineers to implement redundancy for critical SLC 5/04 or 5/05 systems using native Allen-Bradley protocols.
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Secure Industrial Terminations: The 6-pin Phoenix connector provides a vibration-resistant interface for communication wiring. This termination style prevents accidental disconnects in high-vibration manufacturing environments, such as automotive assembly or material handling lines.
FAQs
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Which processors can I use with the 1747-BSN?
The 1747-BSN supports SLC 5/02, 5/03, 5/04, and 5/05 processors. To ensure a successful switchover, you must use identical processors and memory configurations in both the primary and backup chassis.
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Does this module require a specific slot in the 1746 chassis?
While you can technically place the module in any available I/O slot, engineers typically position the 1747-BSN in the first slot following the processor to optimize backplane communication speed and cable management within the cabinet.
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Is this a Brand New original product or a "pull"?
We guarantee this unit is 100% Brand New and Original. Because the 1747-BSN manages critical system failover, using used or refurbished modules introduces unacceptable risk. Our stock ensures factory-fresh components for maximum reliability.
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What happens to the outputs during a switchover?
The 1747-BSN manages the Remote I/O link to ensure that outputs maintain their state or transition to a programmed safe state during the switchover. The exact behavior depends on your Remote I/O adapter settings and the switchover timing configured in the backup scanner's setup.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Mastering PLC Programming: Best Practices for Robust Industrial Automation
Writing clean PLC code requires discipline, especially regarding memory management. Avoid overusing SET and RESET instructions, as they often complicate debugging. If multiple rungs control the same bit, troubleshooting becomes a nightmare. Instead, focus on energizing a bit in only one location. If your logic requires complex conditions, use branches within a single rung. This approach keeps your code readable, maintainable, and significantly easier to audit during downtime.
PLC vs. HMI: Distinguishing the Brain from the Interface in Industrial Automation
In the realm of industrial automation, distinguishing between a Programmable Logic Controller (PLC) and a Human-Machine Interface (HMI) is fundamental. While both devices work in tandem, they serve distinct purposes. The PLC acts as the "brain" of the operation, executing logic, whereas the HMI serves as the "eyes," allowing operators to monitor and interact with the system. Understanding this synergy is essential for any professional designing robust factory automation solutions.
Selecting the Right Industrial Automation Solution for Modern Manufacturing
Choosing an effective industrial automation system starts with a thorough process audit. You must identify tasks that are repetitive, labor-intensive, or prone to human error. Not every process requires high-level automation; therefore, prioritize operations that directly impact throughput and quality. By scoping your needs accurately, you avoid over-investing in unnecessary technology. A balanced approach ensures that your capital expenditure aligns with measurable gains in operational efficiency.