{"product_id":"honeywell-fta-t-18-fail-safe-digital-input-module","title":"Honeywell FTA-T-18 Fail-Safe Digital Input Module","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell FTA-T-18\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eFTA-T-18\u003c\/strong\u003e Fail-safe Digital Input Module, operates as a dedicated hardware component for discrete binary loop verification within safety instrumented systems (SIS) and emergency shutdown (ESD) platforms. This field termination assembly monitors signal paths from external sensory devices, converting voltage transitions into safe-state logic variables passed over centralized communication layers.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eFTA-T-18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States (USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg net hardware mass profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e80 mm x 100 mm x 40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard industrial cabinet environment limits (0 to 60 deg C typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eParameterized by active loops (24 VDC auxiliary input tracking rail)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eFail-safe Digital Input Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Count\u003c\/td\u003e\n\u003ctd\u003e16 discrete input channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal threshold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e20 mA per loop loop load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC logic line routing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e20 mA signal output rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.1% of full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepeatability\u003c\/td\u003e\n\u003ctd\u003e+\/-0.05% of full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Configuration\u003c\/td\u003e\n\u003ctd\u003eStandard DIN rail or structural panel-mount format\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eHoneywell Distributed Control System (DCS) and Universal Control Network (UCN) frameworks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control and DCS Metrics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel-to-Channel Isolation Parameters:\u003c\/strong\u003e The hardware integrates dedicated galvanic separation elements across each of the 16 digital inputs. This configuration guarantees that external loop line faults, grounding deltas, or inductive spikes cross-coupling onto a specific channel path are completely locked from corrupting parallel logic registers or entering the central processing backplane architecture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFail-Safe Signal Integrity:\u003c\/strong\u003e The internal circuit components enforce predefined hardware-level monitoring of the 24 VDC input lines. In the event of an unexpected loop circuit open, wire snap, or diagnostic component failure, the module drops the associated input register down to its low-potential state, initiating an immediate trip sequence across the safety instrumented network.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the FTA-T-18 board layout handle active hot-swap replacement when the host system is powered?\u003c\/p\u003e\n\u003cp\u003eA: Yes. Provided the surrounding enclosure meets safety rules for the specific zone classification, the module can be uncoupled from its structural base rail without interrupting parallel data streams or generating noise faults on neighboring I\/O channels.\u003c\/p\u003e\n\u003cp\u003eQ: How are internal input loop debounce and debounce logic filters controlled on this assembly?\u003c\/p\u003e\n\u003cp\u003eA: Hardware-based RC filtration components are built straight onto the entry layout of each of the 16 channels to dampen high-frequency contact bouncing. Any further mathematical timing windows or latch filters are applied directly through config registers via the host DCS engineering station.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Layout Alignment, Clearance Constraints, and Mechanical Seating:\u003c\/strong\u003e Snap the assembly frame firmly onto a grounded, standard industrial DIN rail, or secure it straight to the cabinet sub-panel using the integrated mounting screw holes. Maintain a minimum 50 mm clearance perimeter above and below the wiring terminal blocks to ensure proper convective air loop cooling and unhindered wire dressing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Separation, Wireway Constraints, and Shield Grounding:\u003c\/strong\u003e Route all 24 VDC field instrument switches and sensor pairs inside panel channels kept physically separate from high-current AC main supply paths or heavy motor control wiring loops. Connect all incoming instrument cable shield drain links directly to the cabinet’s main copper earth ground bus bar to prevent common-mode electrical noise from altering true contact tracking states.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":45147336507507,"sku":"FTA-T-18","price":410.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-07-02_15-58-39.png?v=1782982427","url":"https:\/\/www.dcssupplier.com\/products\/honeywell-fta-t-18-fail-safe-digital-input-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}