Get now 1786-TPYR to optimize your high-density ControlNet wiring with superior right-angle cable management. The Allen-Bradley 1786-TPYR is a specialized Right-Angle Y-Tap module designed for advanced ControlNet coaxial media systems. This passive device serves as the critical junction point between the RG-6 trunk line and the drop cable that connects to the network node. The «Y» designation refers to its internal electrical configuration, which is optimized for high-performance signal splitting, while the right-angle exit provides a 90-degree orientation for the drop cable. This is specifically beneficial in compact ControlNet I/O racks and shallow HMI enclosures where a straight cable would exceed the enclosure depth or put excessive stress on the device’s communication port. By choosing the 1786-TPYR, engineers can ensure a clean, professional installation that adheres to the 75-ohm impedance matching standards of Rockwell Automation, effectively preventing data corruption and timing jitter.
What Is the 1786-TPYR?
The 1786-TPYR is a passive media component of the ControlNet network. It functions as a non-interrupting connection point on the coaxial trunk backbone. This model features a right-angle drop connector, which is ideal for routing cables downwards or upwards within a narrow cable duct. The 1786-TPYR is built to withstand industrial conditions, featuring a shielded housing that protects the internal capacitive and inductive components from the high levels of EMI/RFI found in factory environments. Because it is a passive device, it requires no external power and provides a reliable, long-term connection point for up to 99 nodes on a single ControlNet segment, supporting the deterministic 5 Mbps data rate required for time-critical automation tasks.
Key Technical Specifications
- Part Number: 1786-TPYR
- Manufacturer: Allen-Bradley / Rockwell Automation
- Network Protocol: ControlNet
- Tap Configuration: Right-Angle Y-Tap
- Impedance: 75 Ohms (Matched)
- Cable Compatibility: RG-6 Quad-shielded Coax (Standard and Flex)
- Drop Connection: Male BNC (to node) via drop cable
- Trunk Connections: Two Female BNC ports (In/Out)
- Operating Humidity: 5% to 95% non-condensing
Installation and Topology Benefits
The 1786-TPYR is essential for building a redundant ControlNet media system. In such architectures, two 1786-TPYR taps are used per node—one for Trunk A and one for Trunk B. This right-angle version is particularly praised by panel builders because it allows for very close mounting of redundant components without the «cable nesting» associated with straight-exit taps. It enables a more organized backplane, which facilitates easier troubleshooting and faster visual inspection of the network health LEDs on the adjacent PLC modules.
Installation Advice
When installing the 1786-TPYR, always verify that the BNC connectors are fully locked with a quarter-turn. A loose connection at the tap is the most common cause of «Jitter» on a ControlNet line, which leads to intermittent node failure. An expert installation tip: avoid using standard cable ties directly on the 1786-TPYR body; instead, secure the trunk cables approximately 2 inches away from the tap to provide adequate strain relief. This ensures that the weight of the cable does not pull on the internal BNC contacts, which can cause microscopic fractures in the tap’s solder joints over years of industrial vibration. Furthermore, ensure the tap is mounted using the official mounting bracket to prevent it from dangling and acting as an antenna for electrical noise.
Frequently Asked Questions
Q: What is the difference between the 1786-TPR and the 1786-TPYR?
A: While both are right-angle taps, the 1786-TPYR is a newer «Series» iteration or specific variant that may offer improved shielding or internal component tolerance. Functionally, they are often interchangeable, but always check your system manual for specific series compatibility requirements.
Q: Do I need to terminate the 1786-TPYR if it is the only tap on the line?
A: Every ControlNet trunk segment must be terminated at both ends with 75-ohm resistors (1786-XT). If the 1786-TPYR is at the physical end of a trunk run, one of its trunk ports must have a terminator installed.
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