Product Details
Product Overview
The Allen-Bradley 1786-RPFS serves as a specialized high-speed communication link for ControlNet industrial networks. This ring repeater converts electrical signals into light pulses, allowing data transmission over dual fiber optic channels. It facilitates long-distance communication in environments where traditional copper cabling fails due to distance limitations or heavy electrical interference. We supply this unit as 100% Brand New original factory stock, ensuring your network maintains maximum throughput and deterministic performance.
Technical Specifications
| Feature | Specification |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Line | ControlNet 1786 Series |
| Module Type | Fiber Optic Ring Repeater |
| Channels | Dual Fiber Optic Channel |
| Fiber Compatibility | 200/230 $\mu$m Single-Mode Fiber |
| Maximum Distance | 300 Meters (984 ft) |
| Input Voltage | 24V DC Nominal |
| Mounting | 35mm DIN-Rail Mount |
| Communication Rate | 5 Mbps (ControlNet Standard) |
| Weight | 0.25 lbs (0.11 kg) |
Engineering Advantages
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Immunity to Electromagnetic Interference (EMI): The 1786-RPFS uses fiber optic media to carry data, which completely eliminates the risk of ground loops and electrical noise induction. This makes it the preferred choice for connecting ControlNet nodes located near high-voltage motor drives or arc-welding equipment.
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Deterministic Network Extension: By repeating the signal at the physical layer, this module extends the network span up to 300 meters without introducing variable latency. This ensures that time-critical I/O data remains synchronized across large manufacturing floors.
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Redundant Ring Capability: The dual-channel architecture supports the creation of fiber optic rings. If one fiber link breaks, the repeater instantly utilizes the secondary path to maintain communication, preventing a total system shutdown.
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Simplified DIN-Rail Integration: The compact, lightweight 0.25 lb housing snaps directly onto standard DIN rails. This allows engineers to place repeaters inside localized junction boxes or remote I/O cabinets without specialized mounting plates.
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Efficient Power Management: The unit operates on standard 24V DC industrial power. This simplifies the wiring architecture as it shares the same power bus as most PLC modules and field sensors.
FAQs
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Does the 1786-RPFS support multi-mode fiber?
This specific model identifies compatibility with 200/230 $\mu$m single-mode fiber. Always verify your cable specifications before installation to prevent excessive signal attenuation or connector mismatch.
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Can I mix fiber and copper ControlNet segments?
Yes. You typically use the 1786-RPFS alongside a copper-to-fiber modular repeater (such as the 1786-RPFM) to transition from standard BNC coaxial cable to the fiber optic backbone.
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What are the termination requirements for unused ports?
Unlike coaxial ControlNet segments which require 75-ohm terminators, fiber ports require no physical termination; however, we recommend using protective dust caps to prevent contamination of the optical lens.
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Is this a factory-sealed new unit?
Yes. We guarantee this 1786-RPFS is 100% Brand New. It ships in original Allen-Bradley packaging with intact factory seals to ensure the optical components remain in pristine, unexposed condition.
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 VFD Mechanical Brake Logic and Control in Industrial Automation
Variable Frequency Drives (VFDs) play a crucial role in modern industrial automation by controlling motor speed, torque, and acceleration. However, high-inertia loads and vertical lifting systems require precise mechanical braking logic to ensure operational safety and prevent equipment damage.
Why Programmable Logic Controllers Drop into Stop Mode: An Expert Analysis
Industrial automation systems rely heavily on Programmable Logic Controllers (PLCs) to maintain uninterrupted production. When a PLC unexpectedly shifts from Run to Stop mode, whole manufacturing lines stall.
As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.