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1786-BNC

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Allen-Bradley 1786-BNC is a plug-style coaxial BNC connector for standard ControlNet trunk-cable and tap connections.
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Technical specifications for 1786-BNC

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1786-BNC
  • Product Family:
    1786 Repeaters
  • Product Type:
    ControlNet Media Coaxial BNC Connector
  • Stock:
    1
  • Connector Type:
    Coaxial BNC plug
  • Network Media:
    ControlNet coax
  • Connection Method:
    Twist-lock BNC
  • Documented Use:
    Attach a coax trunk-cable section to a tap BNC connector
  • Temperature Rating:
    -20°C to +80°C
  • Characteristic Impedance:
    75 Ω
  • Cable Termination Type:
    Crimp type
  • Degree of Protection:
    IP20
  • Recommended Installation Tool:
    1786-CTK ControlNet Coax Toolkit
  • Tariff Code:
    8536909000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Cable Preparation Connector Fit Media Test Application
  • Plug-style BNC connector for ControlNet coax
  • Used at trunk-cable and tap interfaces
  • Standard twist-lock connection for appropriate environments

1786-BNC completes a ControlNet coax cable end so it can engage the matching tap connector.

Network reliability depends on the prepared center conductor and shield being held in the intended mechanical relationship inside the connector.

Media testing after assembly helps distinguish connector faults from topology, terminator, or cable-length problems.

Availability, condition, price, and shipping time for 1786-BNC are confirmed during quotation.

Allen-Bradley 1786-BNC ControlNet Media Coaxial BNC Connector Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Use the specified ControlNet coax cable
  • Follow the official stripping dimensions
  • Protect the center conductor and shield during preparation
  • Seat the connector fully before crimping
  • Confirm positive twist-lock engagement at the tap
  • Use TNC hardware when the documented environment requires it
  • Inspect continuity and shield integrity
  • Confirm both network terminators
  • Test the completed segment before production use
  • ControlNet coax trunk-cable termination
  • Tap connection during network extension
  • Maintenance replacement of damaged standard BNC plugs
Description
Allen-Bradley 1786-BNC is the standard plug connector used to terminate ControlNet coaxial media and join a trunk-cable section to a tap BNC interface.

Rockwell Automation documents the connector for the standard ControlNet coax installation method, including cable preparation, center-conductor seating, shield contact, crimping, and post-installation network checks.

It should be selected for ordinary twist-lock BNC service; locations subject to sustained vibration, water, or other rugged conditions require the appropriate TNC-based ControlNet hardware instead.
Alternative Names
1786-BNC Allen-Bradley 1786-BNC Rockwell Automation 1786-BNC Allen-Bradley ControlNet 1786-BNC ControlNet Media 1786-BNC ControlNet Network 1786-BNC
Technical notes
1786-BNC installation requires the specified ControlNet coax, preparation dimensions, connector tooling, shield contact, tap interface, and segment termination; poor crimping or unsuitable environmental exposure can destabilize the network.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
When should Allen-Bradley 1786-BNC be used instead of a TNC connector?
Use 1786-BNC for standard ControlNet coax connections where the twist-lock interface is suitable; Rockwell documents TNC hardware for rugged vibration or water-exposure conditions.
What cable preparation matters most when installing Allen-Bradley 1786-BNC?
Follow the official stripping dimensions, keep the braid and foil intact, seat the center conductor correctly, and use the specified compression or crimp procedure.
Can Allen-Bradley 1786-BNC be reused after a poor crimp?
A damaged or incorrectly crimped connector should not be relied upon. Inspect the cable end and install a new connector using the documented tooling and preparation steps.
Why can a new Allen-Bradley 1786-BNC connection cause ControlNet errors?
Common causes include an incorrectly prepared shield, loose center conductor, incomplete twist-lock engagement, damaged coax, missing terminators, or an invalid trunk topology.
Does Allen-Bradley 1786-BNC replace a ControlNet network terminator?
No. It is a cable connector, not the 75-ohm network terminator required at the two ends of a ControlNet coax segment.
What should be tested after fitting Allen-Bradley 1786-BNC?
Inspect the connector mechanically, verify continuity and shield integrity, confirm both segment terminators, and run the documented ControlNet media tests before returning the network to service.
Can Allen-Bradley 1786-BNC connect directly to ordinary Ethernet coax hardware?
No. It belongs to the specified ControlNet media system, so the cable type, taps, terminators, topology, and installation rules must all match ControlNet documentation.

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