Honeywell FTA-T-21 FTA Terminal Board

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    • Product Code: FTA-T-21
    • Availability: In Stock

    Purchase Attributes：Original, Brand New

    Service Attributes

    ▷ Stock & Logistics：Fast Delivery

    ▷ After-sales Guarantee：12 Months Warranty

    ▷ Online Customer Service：24 Hours Online Support

    ▷ Product Advantages：Competitive Price,  Long Service Life

    Application Attributes：Honeywell FTA-T-21  FTA Terminal Board, Power Control Unit, Industrial Spare Parts

    Honeywell FTA-T-21 Fail-Safe Digital Input Field Termination Assembly (FSC Safety System Dedicated FTA Terminal Board)
    Manufacturer: Honeywell Process Solutions
    Model: FTA-T-21
    Matching System: Honeywell FSC (Fail Safe Control) Safety Interlock System, not compatible with TDC3000 conventional DCS
    Type: DIN rail mounted 16-channel galvanically isolated digital input FTA terminal base, passive field signal transition board without independent CPU
    Core Function: Isolate field dry contact / switch digital input signals, provide surge & ESD protection, fail-safe circuit design, convert field wiring to dedicated ribbon connector for FSC DI controller card; monitor channel open/short circuit fault, support safety interlock critical signal acquisition for petrochemical, power plant SIS systems
    1. Product Overview
    FTA-T-21 is a safety-grade passive field termination board exclusively developed for Honeywell FSC safety instrumented system (SIS). It serves as the signal bridge between field safety switches, limit switches, emergency stop dry contacts and the FSC digital input master card. It adopts orange industrial safety housing, dual-layer terminal block design: one side for field 125VAC / 150VDC field wiring, the other side via dedicated black ribbon connector plug directly to FSC DI card rear slot. Each channel is equipped with independent isolation circuit, surge absorption diode and fault detection loop. Fail-safe design core logic: When power loss, wire break or channel short circuit occurs, the channel automatically enters pre-defined safe state to avoid misoperation of safety interlock. Compared with ordinary DCS FTA boards, it meets IEC61508 SIL2 safety integrity level requirements, with full channel self-diagnosis function. Compact DIN rail mounting structure, light weight 0.12kg, widely deployed in refinery, chemical plant, thermal power plant boiler & turbine safety interlock cabinet, matched with FSC series safety controllers.
    2. Complete Technical Specifications
    • Channel Quantity: 16 independent fail-safe digital input channels
    • Supported Field Signal: Dry contact / passive switch; field voltage range 125VAC / 150VDC max
    • Galvanic Isolation: 1000VAC rms channel-to-backplane isolation, single channel independent isolation
    • Signal Response Time: ≤ 2ms fast response for safety interlock trigger
    • Surge & ESD Protection: ±15kV contact ESD, 2kV line surge suppression per channel
    • Safety Level: IEC61508 SIL2 certified safety circuit design
    • Diagnostic Function: Per-channel open circuit / short circuit fault detection, fault feedback to FSC controller via ribbon cable
    • Mechanical Mount: Standard 35mm DIN rail snap-on mounting
    • Operating Temperature: -40℃ ~ +70℃ forced air industrial cabinet environment
    • Storage Temperature: -40℃ ~ +85℃
    • Humidity: 5% ~ 95% RH non-condensing
    • Power Consumption: Max 1W total power draw from FSC backplane
    • Dimensions: 92mm(H) × 71mm(W) × 58mm(D)
    • Weight: 0.12kg
    • Certification: UL508, CSA C22.2, CE industrial safety certification
    3. Internal Hardware Structure
    1. Two groups of orange screw terminal blocks: field signal wiring terminals (16 DI channels + common ground)
    2. Black multi-core ribbon connector: dedicated interface to FSC digital input controller card
    3. Two built-in fuse holders: overcurrent protection for field bus power supply
    4. PCB isolation circuit array: independent isolation & surge suppression for each channel
    5. DIN rail snap buckle at bottom: quick installation on cabinet standard rail
    4. Core Application Scenarios
    • Petrochemical refinery SIS safety interlock cabinet: emergency stop, pressure high/low limit, flame detector digital signal acquisition
    • Thermal power plant boiler & turbine safety system: valve position feedback, interlock switch, emergency trip DI signal termination
    • Offshore oil & gas platform safety instrument system field switch signal transition
    • Chemical plant reactor safety interlock critical dry contact signal isolation terminal base
    Honeywell © FTA-T-21 FSC Fail-Safe Digital Input Field Termination Assembly


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