{"product_id":"honeywell-mc-tdoy23-51204166-175-digital-output-relay-fta","title":"Honeywell MC-TDOY23 51204166-175 Digital Output Relay FTA","description":"\u003ch2\u003eHoneywell MC-TDOY23 51204166-175 Digital Output Relay FTA\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell MC-TDOY23 51204166-175\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eMC-TDOY23\u003c\/strong\u003e Digital Output Relay FTA, serves as a hardware interface for discrete on\/off signal execution across Honeywell TDC 3000 and Experion PKS distributed control systems.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eMC-TDOY23 \/ 51204166-175\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eU.S.A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eStandard FTA form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003e-40 deg C to +70 deg C (-40 F to +158 F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Supply\u003c\/th\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChannel Count\u003c\/th\u003e\n\u003ctd\u003e16 independent relay outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Voltage Range\u003c\/th\u003e\n\u003ctd\u003eUp to 240 VAC or 125 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Type\u003c\/th\u003e\n\u003ctd\u003eElectromechanical relay contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem Use\u003c\/th\u003e\n\u003ctd\u003eHoneywell TDC 3000 \/ Experion PKS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eRelay FTAs in Honeywell systems maintain deterministic separation between logic-side control voltage and field-side load circuits. The MC-TDOY23 applies channel-to-channel isolation to prevent inductive spikes from propagating into the controller backplane. This isolation behavior aligns with Honeywell’s broader process-control design practices, ensuring predictable switching boundaries and compatibility with 4-20 mA HART loop protocol devices in hybrid installations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the MC-TDOY23 switch both AC and DC loads? A: Yes. The relay outputs support up to 240 VAC or 125 VDC across all 16 channels.\u003c\/p\u003e\n\u003cp\u003eQ: Is hot-swap supported for this FTA? A: No. The module requires rack power-down before insertion or removal to maintain backplane integrity.\u003c\/p\u003e\n\u003cp\u003eQ: How does relay life depend on load current? A: Although contacts can support higher currents, operating near 1 A significantly extends mechanical and electrical life.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaintain correct polarity on the 24 VDC logic-side control wiring.\u003c\/li\u003e\n\u003cli\u003eRoute AC\/DC load wiring separately from logic conductors to reduce inductive coupling.\u003c\/li\u003e\n\u003cli\u003eObserve recommended load current limits to maximize relay life.\u003c\/li\u003e\n\u003cli\u003eVerify isolation and switching behavior using system diagnostics after installation.\u003c\/li\u003e\n\u003cli\u003eEnsure cabinet airflow prevents thermal accumulation around relay assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":44567082729571,"sku":"MC-TDOY23 51204166-175","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/d743c543fe157b7463addfef53f97bbd.jpg?v=1728756020","url":"https:\/\/precisemodule.com\/products\/honeywell-mc-tdoy23-51204166-175-digital-output-relay-fta","provider":"Precise Module Ltd.","version":"1.0","type":"link"}