Allen Bradley 1786-RPFM ControlNet Fiber Ring Medium Repeater Module
Allen Bradley 1786-RPFM ControlNet Fiber Ring Medium Repeater Module
0.0
Points
Brand:Allen Bradley PLC Item No.:Allen Bradley 1786-RPFM Product Origin: USA Product Dimensions:137 × 134 × 93 mm Product Weight:0.25 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen Bradley 1786-RPFM ControlNet Fiber Ring Medium Repeater Module is designed to extend and stabilize industrial ControlNet networks using fiber-optic communication. It provides deterministic signal regeneration and optical isolation, enabling reliable high-speed communication across long distances and electrically noisy industrial environments.
Widely deployed in large-scale automation systems, this module supports advanced network topologies such as ring, star, linear, and point-to-point configurations. It is commonly used with the 1786-RPA repeater adapter to build scalable and fault-tolerant ControlNet infrastructures in manufacturing, energy, and process industries.
Technical Specifications
Specification
Details
Manufacturer
Allen Bradley (Rockwell Automation)
Model Number
1786-RPFM
Product Family
ControlNet
Module Type
Fiber Ring Medium Repeater Module
Communication Rate
5 Mbps
Fiber Type
62.5/125 µm multimode (OM1)
Wavelength
1300 nm
Maximum Distance
Up to 3 km per segment
Fiber Connector Type
ST connector
Power Supply
5 V DC (via 1786-RPA)
Backplane Current
Max 400 mA
Power Consumption
Approx. 2 W
Topology Support
Ring / Star / Linear / Point-to-Point
Installation Method
Panel mount / DIN rail (system dependent)
Operating Temperature
0°C to 60°C
Physical Dimensions & Weight
Mechanical Property
Specification
Overall Dimensions (L × W × H)
Approx. 137 × 134 × 93 mm
Net Weight
Approx. 0.25 kg
Recommended Related Models
The 1786-RPFM is typically used within a full ControlNet communication infrastructure alongside other repeater and network components.
Related Model
Description
1786-RPA
ControlNet Repeater Adapter
1786-RPCD
Dual Copper Repeater Module
1786-RPFS
Short-Distance Fiber Repeater
1786-RPFRL
Long-Distance Fiber Ring Repeater
1786-RPFRXL
Extended Fiber Repeater
1786-BNC
Coaxial BNC Connector
1786-XT
ControlNet Terminator
1786-TPS
ControlNet Tap Module
1756-CN2
ControlLogix ControlNet Module
1756-EN2TR
Ethernet/IP Communication Module
Popular Allen Bradley Automation Products
Allen Bradley automation systems are widely used in global industries for reliable control, communication, and industrial networking performance.
Popular Model
Product Category
1756-L85E
ControlLogix Controller
1769-L36ERM
CompactLogix Controller
5069-IF8
I/O Module
2711P-T12C4D8
PanelView HMI
20G11NC072JA0NNNNN
PowerFlex 755 Drive
1734-AENTR
POINT I/O Adapter
1606-XLS240E
Power Supply Module
1756-EN2TR
Ethernet/IP Communication
1794-IE8
FLEX I/O Analog Module
25B-D013N114
PowerFlex 525 Drive
Industrial Applications
The Allen Bradley 1786-RPFM is used in industrial environments requiring long-distance, noise-resistant, and deterministic communication networks.
Typical applications include:
Large-scale factory automation systems
Automotive production plants
Oil and gas control networks
Water and wastewater treatment systems
Power generation monitoring systems
Mining and heavy industrial operations
Packaging and logistics automation
Chemical processing facilities
Distributed Control System (DCS) networks
Industrial network modernization projects
Its fiber-optic design makes it especially suitable for environments with high electromagnetic interference or long-distance communication requirements.
Key Advantages
Extended Fiber Network Reach
Supports communication distances up to 3 km, enabling large-scale industrial network expansion.
Strong Electrical Isolation
Fiber-optic transmission eliminates electromagnetic interference, improving signal stability in harsh environments.
Flexible Network Topologies
Supports ring, star, linear, and point-to-point configurations for scalable system design.
High Signal Integrity
Regenerates and retimes ControlNet signals to ensure deterministic and reliable communication.
Industrial-Grade Reliability
Built for continuous operation in demanding automation environments with vibration, noise, and temperature variation.
Technical FAQs
1. What is the Allen Bradley 1786-RPFM used for?
It is used to extend and convert ControlNet networks using fiber-optic communication for industrial automation systems.
2. What type of fiber does it use?
It uses 62.5/125 µm multimode OM1 fiber with ST connectors.
3. What is the maximum communication distance?
It supports fiber communication distances up to approximately 3 km per segment.
4. What is the communication speed?
The module operates at a ControlNet communication rate of 5 Mbps.
5. Does it require external power?
It is powered through the 1786-RPA repeater adapter via 5 V DC backplane power.
6. What is the main function of this module?
It regenerates and transmits ControlNet signals over fiber to extend network reach and improve stability.
7. Which topologies are supported?
It supports ring, star, linear, and point-to-point network architectures.
8. Is it resistant to industrial noise?
Yes. Fiber-optic transmission provides strong immunity to electromagnetic interference.
9. Where is it commonly used?
It is used in manufacturing, energy, oil and gas, water treatment, and large-scale industrial networks.
10. Why is the 1786-RPFM important in automation systems?
Because it enables long-distance, interference-free, and deterministic ControlNet communication essential for high-reliability industrial control.
