Product Overview

The ABB TK821F (Product ID: 3BDM000150R1) functions as a specialized dual-channel serial communication cable designed for the Freelance and INFI 90 DCS ecosystems. This 0.5-meter prefabricated cable provides the vital link between the FI 820F module and the TB 870F Terminal Block. By supporting two independent channels within a single assembly, the TK821F streamlines redundant data paths and ensures stable signal acquisition for critical process control. We provide this unit as 100% Brand New and Original, ensuring your industrial network maintains peak EMI resistance and timing accuracy.

Technical Specifications

Engineering Advantages

The TK821F addresses the complexities of localized serial networking in high-density control cabinets through its dual-path architecture and robust shielding.

• Dual-Channel Integration: This cable integrates two serial channels into one prefabricated assembly. This design reduces the number of physical cables required for redundant communication, effectively halving the space needed in cramped cable trays.

• Optimized Signal Integrity: The TK821F features high-grade shielding that rejects electromagnetic interference (EMI) generated by nearby variable frequency drives (VFDs) and high-power switchgear. This ensures error-free data transmission at baud rates up to 115200 bps.

• Rugged Plug-and-Play Connectors: Integral factory-molded connectors eliminate the signal attenuation often caused by field-crimped terminals. The locking mechanisms provide a gas-tight, vibration-proof connection essential for turbine decks and offshore platforms.

• Low-Latency Interconnect: The short 0.5m length minimizes propagation delay and signal reflection. This makes the TK821F the ideal choice for high-speed serial links between localized controllers and terminal distribution blocks.

FAQs

• Is the TK821F compatible with systems using the DFA 021 cable?

  Yes. The TK821F (3BDM000150R1) is electrically and mechanically identical to the DFA 021. You can use it as a direct drop-in replacement without any hardware modifications.

• Does this cable support redundancy?

  The "dual-channel" designation allows the TK821F to carry two separate serial streams simultaneously. This supports redundant communication strategies where the FI 820F requires two data paths to the terminal block.

• Can I extend the length of this cable?

  Serial communication is sensitive to impedance changes. While extensions are technically possible, we recommend using the standard 0.5m length to ensure the cable meets ABB’s original EMI and signal attenuation specifications.

• What is the typical lead time for DHL shipping?

  We maintain this product in a "Brand New" state with an estimated lead time of 1 to 10 working days. We utilize expedited services like DHL or FedEx to minimize downtime for your facility.