{"product_id":"arm55d-000-yokogawa-relay-boards","title":"ARM55D-000 | Yokogawa | Relay Boards","description":"\u003ch2\u003eYokogawa ARM55D‑000 Relay Board\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa ARM55D‑000\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eARM55D\u003c\/strong\u003e relay board, operates as a dedicated dry‑contact output component for mechanical relay actuation within CENTUM‑series I\/O networks.\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\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\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eARM55D‑000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e2.2 kg (shipping: 3 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e18.4 cm × 48.2 cm × 13.2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eRelay Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eContact Type\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eMechanical relay dry contact, “a” contact (NO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eRedundancy\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eSingle \/ dual‑redundant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eContact Points\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e32‑point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eField Terminals\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eM4 screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eInsulation Resistance\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e≥ 10 MΩ at 500 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003e19‑inch rack mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eModel Definition\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eARM55D = 32 dry contact outputs\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 \u0026amp; Channel‑to‑Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eAlthough ARM‑series relay boards do not process analog loops directly, Yokogawa’s DCS hardware design applies the same isolation principles used in HART and Fieldbus subsystems. Each of the 32 dry‑contact channels is mechanically isolated, preventing cross‑channel interference when switching inductive or capacitive field loads. The board’s M4 terminal layout maintains separation distances that reduce noise coupling from adjacent circuits. Relay actuation paths follow deterministic isolation rules similar to those used in FOUNDATION Fieldbus segment protection, ensuring stable switching behavior in redundant architectures.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the ARM55D‑000 be hot‑swapped?\u003c\/strong\u003e A: No. Relay boards must be inserted or removed only when the I\/O segment is de‑energized to avoid unintended contact transitions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the board support mixed contact types?\u003c\/strong\u003e A: No. ARM55D‑000 provides 32 NO dry‑contact outputs only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are the terminals suitable for larger field conductors?\u003c\/strong\u003e A: Yes. M4 screw terminals support typical control‑room wiring gauges used for relay and interlock circuits.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the board in a 19‑inch rack using the designated hardware to ensure correct alignment with adjacent I\/O modules.\u003c\/li\u003e\n\u003cli\u003eRoute relay output wiring separately from analog loops to prevent impedance coupling.\u003c\/li\u003e\n\u003cli\u003eMaintain shield continuity and terminate shields at a single grounding point to avoid ground‑loop interference.\u003c\/li\u003e\n\u003cli\u003eVerify torque on M4 terminals to ensure stable mechanical retention under vibration.\u003c\/li\u003e\n\u003cli\u003eInspect relay contact groups during commissioning to confirm correct NO contact behavior and redundancy configuration.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":48164830019774,"sku":"ARM55D-000","price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/yokogawa-aap135-s00-s2-pulse-input-module-cymztlvujog_fe110023-4de5-4fc1-8b74-4f0f24bfff62.png?v=1776329475","url":"https:\/\/www.autooiltech.com\/ar\/products\/arm55d-000-yokogawa-relay-boards","provider":"AutoOilTech Limited","version":"1.0","type":"link"}