Product Overview

The Allen Bradley 1786-TPRT2T is a ControlNet IP67 TNC T-Tap assembly used to connect field devices to a ControlNet coaxial network in industrial environments. It belongs to the Allen-Bradley Bulletin 1786 ControlNet media product family and features a TNC-to-right-angle TNC connection arrangement.

The assembly consists of a sealed T-tap body and an integrated 1-meter drop cable with overmolded connectors. One end of the cable connects to the tap body through a TNC interface, while the device-side end uses a right-angle TNC connector. This configuration provides a compact connection arrangement for ControlNet nodes where cable routing and connector clearance need to be considered.

The 1786-TPRT2T is particularly suitable for applications requiring sealed network connections. When properly mated with compatible sealed connectors, the tap assembly provides IP67 protection against dust and water ingress.

Unlike a standard coaxial connector or cable extension, this product functions as a network tap. It provides a branch connection between the ControlNet trunk cable and an individual network node while maintaining the coaxial communication path.

Its right-angle connector arrangement distinguishes it from the straight-connector version 1786-TPST2T and makes connector orientation an important consideration during replacement and system planning.

Technical Specifications

Product Features

• Right-Angle TNC Connection: Uses a right-angle TNC connector at the ControlNet node end to accommodate different cable-routing arrangements.
• Integrated 1-Meter Cable: Combines the tap body and drop cable into one assembly, reducing the need for separate cable and connector installation.
• IP67 Protection: Provides dust-tight and water-resistant performance when fully mated with a compatible sealed connector.
• Overmolded Connectors: Uses molded cable-to-connector interfaces to protect the connection assembly in industrial environments.
• ControlNet Network Compatibility: Provides a branch connection for compatible ControlNet coaxial network nodes.
• Sealed T-Tap Construction: Supports ControlNet installations where environmental protection is required.
• Industrial Temperature Range: Supports operation in ambient temperatures from -20 to +70°C.
• Compact Connection Arrangement: The right-angle connector helps accommodate installations with limited clearance around network devices.

Product Working Principle

The 1786-TPRT2T operates as a passive coaxial network tap within a ControlNet communication system. Its function is to establish a branch connection between the main coaxial trunk and an individual network device.

The T-tap body connects to the ControlNet network media, while the integrated 1-meter drop cable links the tap to the node. The TNC connector at the tap end provides the connection to the sealed tap body, and the right-angle TNC connector at the opposite end connects to the ControlNet device.

ControlNet communication signals travel through the coaxial network infrastructure. The tap provides the required physical connection between the trunk cable and the node without functioning as an active repeater or signal-processing device.

The right-angle connector changes the physical orientation of the cable connection, helping technicians route the drop cable around adjacent equipment or within confined installation spaces.

When properly assembled with compatible sealed connectors, the connection maintains its IP67 environmental protection rating.

A simplified connection arrangement is:

ControlNet Coaxial Trunk → 1786-TPRT2T T-Tap → 1-Meter Drop Cable → ControlNet Node

The tap does not independently generate network signals, assign node addresses, or manage communication traffic. These functions are handled by the connected ControlNet devices and network infrastructure.

Role in Allen-Bradley ControlNet Communication Architecture

Within an Allen-Bradley ControlNet installation, the 1786-TPRT2T provides the physical media connection between the coaxial trunk and an individual network node.

ControlNet uses a coaxial trunk-and-tap topology. The trunk forms the main communication path, while individual taps connect controllers, communication modules, and other compatible devices to the network.

The 1786-TPRT2T is used where a sealed TNC connection and right-angle drop cable arrangement are required.

The right-angle drop connection is particularly relevant when installing ControlNet communication hardware in cabinets where straight connectors may interfere with neighboring modules or cable routing.

Industrial Applications

The Allen Bradley 1786-TPRT2T is suitable for ControlNet installations that require sealed coaxial network connections and right-angle cable routing.

Installation and Maintenance

1. Verify the Model Number: Confirm that 1786-TPRT2T is the required IP67 T-tap with a right-angle TNC drop connector.
2. Check Network Compatibility: Verify that the connected equipment uses the appropriate ControlNet coaxial media and TNC connection arrangement.
3. Inspect the Assembly: Examine the tap body, cable jacket, overmolded sections, and TNC connectors for physical damage.
4. Plan Cable Routing: Identify a suitable installation path for the 1-meter drop cable and ensure that the right-angle connector has sufficient clearance.
5. Check Connector Orientation: Confirm that the right-angle TNC connector matches the connection requirements of the target ControlNet node.
6. Inspect Sealing Interfaces: Check the mating surfaces and sealing components of the connectors before assembly.
7. Install the Tap: Connect the T-tap body to the designated ControlNet network connection according to the system installation instructions.
8. Connect the Drop Cable: Attach the right-angle TNC connector to the compatible ControlNet node.
9. Verify Connector Engagement: Ensure that the TNC connectors are correctly engaged and secured according to the manufacturer’s instructions.
10. Check Environmental Protection: Confirm that all required sealed connections are properly mated before relying on the IP67 protection rating.
11. Test Network Communication: Check the connected node and ControlNet communication status after completing the installation.
12. Perform Routine Inspection: Periodically inspect the cable jacket, connector interfaces, tap body, and mounting arrangement for signs of wear or damage.

Compatible System Components

Recommended Related Models

Key Advantages

• Integrated ControlNet T-tap and 1-meter drop cable assembly.
• Right-angle TNC connector for flexible cable routing.
• IP67 protection when fully mated with compatible sealed connectors.
• Overmolded connector construction.
• Compatible with ControlNet coaxial network infrastructure.
• Suitable for industrial installations requiring protected network connections.

Technical FAQs

1. What is the difference between 1786-TPRT2T and 1786-TPST2T?

Both models are ControlNet IP67 TNC T-tap and cable assemblies with a 1-meter drop cable. The main difference is the node-side connector orientation. The 1786-TPRT2T uses a right-angle TNC connector, while the 1786-TPST2T uses a straight TNC connector.

2. Does the 1786-TPRT2T include the drop cable?

Yes. The assembly includes the T-tap body and an integrated 1-meter coaxial drop cable with overmolded connectors. The cable has a TNC connection at the tap body and a right-angle TNC connection at the ControlNet node end.

3. Is the 1786-TPRT2T suitable for outdoor or wet industrial environments?

The assembly is rated IP67 when fully mated with a compatible sealed connector. The complete installation must also maintain appropriate sealing at all mating interfaces to achieve the specified environmental protection.

4. Can the 1786-TPRT2T replace a standard 1786-TPR coaxial tap?

Not necessarily. Although both products use a right-angle connection arrangement, the 1786-TPRT2T is an IP67 TNC tap assembly, whereas the 1786-TPR is a standard ControlNet right-angle T-tap. Connector type, sealing requirements, and network installation configuration must be checked before selecting a replacement.