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Invensys 7400121-380
Invensys 7400121-380
Invensys 7400121-380
· Product image is representative; revision or series may vary. Contact us to request a specific version.

7400121-380

External Terminator

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Shipping Information

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  • For indent items, typical turnaround is 1-3 weeks, depending on parts availability and scarcity.

Technical specifications for 7400121-380

  • Product Model
    7400121-380
  • Spare Model
    2661-8
  • Product Parameters
    External Terminator
  • Tariff Code
    8537101190
  • Country of origin
    USA
  • Place of shipment
    Xiamen, China
  • Estimated Shipping Size
    48.2x17.7x4.3cm
  • Manufacturer
    Invensys
  • Weight
    1.7 kg
  • Resistance
    0.15 Ω ±5 % per channel
  • Mounting
    Snap-fit on Tricon FTP rail
  • Connectors
    16 × rising-clamp terminals
  • Temperature
    –40…+70 °C
  • Nominal Voltage
    24 V DC
  • Channel Capacity
    8 identical, independent channels
  • Continuous Current
    2 A per point maximum
  • Voltage Drop
    Less than 0.3 V @ 2 A

Description

7400121-380 
External Terminator
External Relay Termination 
with 16 Interposing Relay Contacts

Information

Overview Manuals Technical notes Product Applications Field Device Termination

Features:

  • 16-Channel Mechanical Relay Interposing Termination
  • Precision Resistance Termination
  • Rising-Clamp Screw Terminal Connections
  • DIN Rail Snap-Fit Mounting
  • Wide Industrial Temperature Range
The TRICONEX 7400121-380 External Terminator is a specialized relay external termination module engineered for the Triconex Tricon family of Triple-Modular Redundant (TMR) safety and control systems.

Physically, the module consists of an electrically passive printed circuit board (PCB) mounted within a robust plastic housing. The PCB integrates 16 precision termination channels, each featuring a 0.15 Ω ±5 % resistor that ensures proper line impedance at the end of the communication bus. This termination network effectively absorbs signal reflections, prevents standing waves, and maintains data integrity across various bus topologies—including star and linear bus configurations—thereby reducing communication error rates in electrically noisy plant environments.

The 7400121-380 TRICONEX External Terminator may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
TRICONEX 7400121-380 External Terminator Manuals, Datasheets, Drivers, Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Field wiring is terminated via 16 rising-clamp screw terminals that accommodate wire gauges from 24 AWG to 12 AWG (0.3 mm² to 2.1 mm²). These compression-style terminals deliver reliable, gas-tight electrical connections resistant to vibration and thermal cycling, while permitting tool-free re-termination during maintenance or module upgrades. The entire assembly snaps onto standard DIN 50022 mounting rails, enabling rapid installation in marshalling cabinets and allowing dense, orderly panel layouts alongside other Tricon external termination panels (ETPs).
  • Automotive Parts Production:High-volume turning/milling of engine/transmission parts
  • Aerospace & Drone Engineering:Precision machining of aluminum/titanium drone parts
  • Custom Tooling & Die Making:Stamping parts, die casting molds & prototypes
  • Architectural & Automotive Glass:Low-E & solar-control coatings on large glass
  • Solar Panel Production:Deposits photovoltaic layers for thin-film solar
This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Strip the field wiring insulation back according to your standard terminal block requirements (typically 5–7mm).
Insert the wires into the 16 rising-clamp terminals assigned to your process loops.Secure the terminal screws using an appropriate precision screwdriver. 
Each channel has an internal resistance specification of 0.15 Ω ±5%.
Organize and label wires neatly to prevent physical strain on the terminal blocks.

FAQs

  • What is the 7400121-380 ?

    +
    The Triconex 7400121-380 is an external termination component commonly used in Tricon fault-tolerant safety systems.
  • What is the primary function of the 7400121-380?

    +
    It is designed to route signals from field devices directly into the Triconex module termination panels, reducing cabinet wiring complexity and allowing for reliable, plug-and-play connections.
  • How does this module fit into Tricon's Triple-Modular Redundant (TMR) architecture?

    +
    In a standard Triconex TMR safety framework, three isolated, parallel control legs run simultaneously to eliminate a single point of failure. While the core processor legs execute internal safety logic and perform
  • Is the 7400121-380 compatible with all Tricon systems?

    +
    It is primarily designed for the Tricon v9, v10, and v11 generations. You should always verify your exact baseplate and module compatibility with your system's hardware manual.
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Disclaimer: Amikon Limited sells new and surplus products and develops channels for purchasing such products. Amikon Limited is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Amikon Limited is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. Amikon Limited is not an authorized distributor, dealer, or representative of the products displayed on this website. All product names, trademarks, brands, and logos used on this website are the property of their respective owners. The description, explanation, or sale of products with these names, trademarks, brands, and logos is for identification purposes only and is not intended to indicate any association with or authorization from any rights holder.
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