Allen-Bradley 1786-TPS ControlNet Straight BNC T-Tap Series C

Allen-Bradley 1786-TPS Series C ControlNet Coaxial Straight T-Tap

Product Overview

The 1786-TPS (Series C) is a high-integrity coaxial T-tap designed by Rockwell Automation for the ControlNet physical layer. This essential accessory serves as the connection interface between a ControlNet node (such as a Logix controller, FLEX I/O adapter, or PowerFlex drive) and the network's main trunk cable. Featuring a "straight drop" configuration and a integrated 1-meter drop cable, the 1786-TPS allows for the seamless addition or removal of devices from an active network without interrupting the data flow on the main trunk line. Its passive design ensures deterministic communication and high signal reliability in complex distributed I/O architectures.

Technical Specifications

The 1786-TPS is engineered to maintain the strict 75 Ω impedance required for high-speed industrial data transmission.

• Manufacturer: Rockwell Automation / Allen-Bradley

• Model Number: 1786-TPS

• Hardware Revision: Series C (Backward compatible with Series A and B)

• Function: Straight drop T-tap for node-to-trunk connection

• Drop Cable Length: 1 Meter (approx. 3.28 ft)

• Connector Type: BNC (Bayonet Neill–Concelman)

• Impedance: 75 Ω (Optimized for ControlNet signals)

• Cable Type Supported: RG-6 Quad-shield coaxial cable

• Mounting Options: DIN Rail, Surface, or Fixture mount

• Housing Material: Nickel-plated brass for corrosion resistance

• Contact Pin: Gold-plated for superior electrical conductivity

• Operating Temperature: -40°C to +85°C (-40°F to +185°F)

• Weight: 0.20 lbs (0.09 kg)

• Certifications: IECEx, CE, UL, CSA compliance

Core Performance Features

• Non-Intrusive Connection: The 1786-TPS utilizes a passive tap design, meaning nodes can be disconnected for maintenance without breaking the trunk line continuity, preventing network-wide downtime.

• Ruggedized Construction: Built with industrial-grade nickel-plated brass, the tap provides excellent EMI/RFI shielding, ensuring data integrity in environments with high electrical noise.

• Series C Reliability: The Series C revision offers refined mechanical tolerances and improved environmental sealing over legacy Series B versions.

• Low Insertion Loss: Engineered to minimize signal reflection and attenuation, allowing for maximum network segment lengths and node counts.