{"product_id":"honeywel-fta-t-15-relay-module","title":"Honeywel FTA-T-15 Relay Module","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell FTA-T-15\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eFTA-T-15\u003c\/strong\u003e General Purpose Relay Module, operates as a dedicated hardware component for multi-channel digital output isolation and electrical load switching within Honeywell distributed control networks. This field termination assembly (FTA), weighing 3.00 lbs under part number \u003cstrong\u003eFTAT15\u003c\/strong\u003e, provides direct physical and electrical execution by routing low-voltage logic commands to mechanical relay coils to control auxiliary field devices.\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-15 \/ FTAT15\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\u003eFactory Standard Global Site\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.00 lbs (1.36 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard termination panel footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eFactory standard industrial ambient window\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal relay coil voltage drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Classification\u003c\/td\u003e\n\u003ctd\u003eGeneral Purpose Mechanical Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Category\u003c\/td\u003e\n\u003ctd\u003ePLCs \/ Machine Control Module Rack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifecycle Status\u003c\/td\u003e\n\u003ctd\u003eDiscontinued by Manufacturer (Supported via legacy stock networks)\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 Instrumentation Execution\u003c\/h3\u003e\n\u003cp\u003eThe FTA-T-15 manages high-density digital contact states and inductive coil voltage spikes directly across the system's distribution backplane. To drive multi-point auxiliary loops concurrently without software loop execution lag or contact bounce timing delays, the terminal board isolates the sensitive upstream digital output circuits using robust 24 VDC interposing relays. This physical separation prevents inductive field back-EMF surges from corrupting system logic components, directly supporting deterministic loop tracking rules and expanding physical I\/O density scaling options within specialized marshalling enclosures. Because the relay matrix connects directly to high-consequence field interlocks, the termination framework maintains complete circuit and firmware flash compatibility with upstream engineering master cards, ensuring that command execution states and diagnostic fault logs pass over the bus lines without causing signal transit noise or communication timeouts.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the main functional advantage of utilizing a 24 VDC interposing relay module like the FTA-T-15 instead of direct digital output wiring?\u003c\/p\u003e\n\u003cp\u003eA: The module establishes a strict galvanic isolation barrier between the delicate digital output card logic and the high-current field loads. If an external short circuit or voltage surge occurs on the field side, it destroys the replaceable mechanical relay rather than bleeding back to damage the central control subrack.\u003c\/p\u003e\n\u003cp\u003eQ: How should a technician diagnose a single channel failure on this discontinued relay module?\u003c\/p\u003e\n\u003cp\u003eA: Check the status of the specific channel's logic command LED from the controller side, then measure the 24 VDC coil voltage directly at the board trace. If the coil receives 24 VDC but the field-side dry contacts fail to change state, the underlying mechanical relay has reached its mechanical endurance limit and requires replacement.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":45058345500787,"sku":"FTA-T-15","price":410.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-05-12_11-29-02_1619c8fb-0b62-4d5b-9534-939879a725e2.png?v=1780303097","url":"https:\/\/www.dcssupplier.com\/products\/honeywel-fta-t-15-relay-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}