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
Understanding Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.