Allen-Bradley 1715-TADOF8 Analog Output Termination Assembly

Configured for signal distribution in 1715 Redundant I/O systems, the Allen-Bradley 1715-TADOF8 (1715-TADOF8 Termination Assembly) provides direct physical execution of wiring termination for analog output duplex modules. This assembly acts as the field-side interface point, routing analog output signals to the 1715-OF8 module while supporting redundant architecture requirements to maintain signal consistency across the termination interface.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks & Firmware Flash Compatibility

The 1715-TADOF8 functions as a passive interconnection layer within the 1715 I/O system, which supports deterministic communication protocols. Although this assembly does not contain active logic or firmware, its physical interface integrity directly impacts the system's backplane bus communication velocity. Maintenance of high-speed data exchange requires that all terminal connections remain within specified torque limits to minimize signal attenuation. Any intermittent contact at the termination points can introduce noise into the analog loop, potentially affecting the deterministic timing of the output signals managed by the host processor.

Frequently Asked Questions

Q: Is the 1715-TADOF8 suitable for use in simplex applications?

A: No. This termination assembly is specifically engineered for duplex (redundant) analog output configurations. Attempting to use this assembly in a simplex application may result in open-circuit faults or incorrect loop feedback, as it is designed to interface with redundant channel pairs.

Q: Can this assembly be replaced while the I/O system is energized?

A: Yes. The 1715 system supports Removal and Insertion Under Power (RIUP). Ensure all field-connected loops are in a safe state and that appropriate isolation procedures are followed before unseating the assembly to prevent output transients during module extraction.

Field Installation Guidelines

• Mounting: Seat the termination assembly onto the mounting base, ensuring the redundant backplane connectors are correctly aligned. Tighten the retaining hardware to ensure the assembly is secured against mechanical vibration.
• Wiring Requirements: Use only shielded cable for all analog output signals to minimize electromagnetic interference. Ensure the shield is properly bonded at the termination point to provide a continuous path to ground.
• Termination: Tighten all field wiring terminals to 0.5 N-m. Overtightening can damage the terminal block threads, while undertightening can result in high-resistance connections and output signal instability.
• Inspection: Regularly inspect the termination assembly for signs of thermal stress or oxidation, particularly in environments with high humidity or corrosive air contaminants, which may degrade the signal contact quality over time.