Purchase now 1786-TNCL10 to ensure the highest standard of signal integrity for your ControlNet industrial network. The Allen-Bradley 1786-TNCL10 is a factory-terminated, 10-foot (3.04-meter) RG-6 quad-shielded coaxial cable assembly designed specifically for ControlNet backbone and drop connections. Unlike field-terminated cables, this assembly is pre-crimped with precision-engineered BNC connectors under strict OEM quality controls, ensuring a constant 75-ohm impedance and minimizing decibel loss across the 5 Mbps deterministic bus. Utilizing the 1786-TNCL10 is essential for critical control paths where signal reflections caused by poor terminations could lead to unscheduled downtime or data corruption. Its quad-shielding architecture provides a superior barrier against electromagnetic interference (EMI) and radio frequency interference (RFI), making it the ideal choice for high-noise environments near variable frequency drives (VFDs) and large industrial motors.
What Is the 1786-TNCL10?
The 1786-TNCL10 is a pre-manufactured segment of ControlNet media. It serves as a reliable link between taps (1786-TPS) or as a drop cable connecting a 1786-TNCL series connector to a ControlNet adapter module. In a ControlNet architecture, the physical layer must maintain specific electrical characteristics to support the Manchester-encoded signal. This 10-foot cable simplifies installation by providing a «plug-and-play» solution that eliminates the need for specialized crimping tools (like the 1786-CTK) in the field, thereby reducing human error and ensuring that the network meets Rockwell Automation’s stringent communication certification standards from the moment it is plugged in.
Key Technical Specifications
- Part Number: 1786-TNCL10
- Manufacturer: Allen-Bradley / Rockwell Automation
- Cable Type: RG-6 Coaxial (Quad-Shielded)
- Length: 10 feet (3.04 meters)
- Impedance: 75 Ohms nominal
- Connector Type: Factory-installed BNC Male
- Data Rate: 5 Mbps
- Operating Temperature: -20°C to +75°C (-4°F to 167°F)
- Shielding: Two layers of aluminum foil and two layers of aluminum braid
Network Media Compatibility
This cable assembly is fully compatible with all Allen-Bradley ControlNet hardware, including Series A and Series B taps. It is designed for use in both redundant and non-redundant media configurations. When building a ControlNet trunk line, using factory-tested lengths like the 1786-TNCL10 ensures that the «Velocity of Propagation» remains consistent across the entire network segment, which is vital for the deterministic timing requirements of high-speed PLC-to-I/O data exchange.
Expert Tips
When routing the 1786-TNCL10 through tight industrial enclosures, never exceed the minimum bend radius of 3 inches (76 mm). Over-bending a quad-shielded coaxial cable can permanently deform the internal dielectric, leading to a localized change in impedance. This creates «standing waves» where the signal bounces back, potentially causing intermittent Media Fault alarms that are notoriously difficult to troubleshoot without an oscilloscope. Always use velcro ties rather than plastic zip ties to avoid crushing the cable jacket and affecting the signal path.
Frequently Asked Questions
Q: Can I use this cable for standard Ethernet or Video applications?
A: No. While it uses BNC connectors, the 1786-TNCL10 is specifically tuned for the 75-ohm requirements and signaling frequencies of ControlNet. Using it for standard 50-ohm Ethernet or mismatched video systems will result in signal degradation.
Q: Is this cable rated for high-flex applications like cable tracks?
A: No. The 1786-TNCL10 uses a standard PVC jacket and solid center conductor designed for fixed installations. For continuous motion applications, a specialized high-flex fiber or flexible coax solution should be utilized.
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