{"product_id":"relay-board-module-yokogawa-arm55d-000","title":"Relay Board Module | Yokogawa ARM55D-000","description":"\u003ch2\u003eYokogawa ARM55D-000 Relay Board Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for discrete dry contact signal distribution in CENTUM VP I\/O architecture, the \u003cstrong\u003eYokogawa ARM55D-000\u003c\/strong\u003e (\u003cstrong\u003eARM55D-000\u003c\/strong\u003e Relay Board) provides direct physical\/electrical execution of 32-point mechanical relay switching within Yokogawa field I\/O racks.\u003c\/p\u003e\n\u003cp\u003eThe module interfaces downstream digital output channels to field devices via isolated dry contact relays, converting low-level control signals into galvanically separated switching states. Integration is designed for backplane-driven coordination with compatible FIO digital output modules in Yokogawa CENTUM VP and CENTUM CS 3000 systems.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eARM55D: 32-point mechanical relay output board (dry contact, NO type)\u003c\/li\u003e\n\u003cli\u003e-0: Fixed configuration code\u003c\/li\u003e\n\u003cli\u003e0: 19-inch rack mount variant\u003c\/li\u003e\n\u003cli\u003e0: basic construction type\u003c\/li\u003e\n\u003c\/ul\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\u003ctd\u003eModelBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa ARM55D-000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e482.6 mm x 132.5 mm x 184 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperatingTemp\u003c\/td\u003e\n\u003ctd\u003e0 degC to 50 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowerConsumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC, max 0.65 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e32-point dry contact (NO, a-contact)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e250 VAC 2 A, 30 VDC 2 A, 125 VDC 0.1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;= 10 MOhm at 500 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Strength\u003c\/td\u003e\n\u003ctd\u003eUp to 3 kVAC (field to case)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eM4 screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch2\u003eChannel-to-Channel Isolation and Relay Execution Characteristics\u003c\/h2\u003e\n\u003cp\u003eThe ARM55D-000 implements mechanical relay separation per channel group to prevent backfeed propagation between output lines in CENTUM VP field termination structures. Each relay channel operates as a discrete electromechanical switching element driven by upstream digital output modules over Yokogawa FIO backplane signaling. Contact bounce and mechanical switching delay are inherent to relay actuation and must be considered in sequence timing logic.\u003c\/p\u003e\n\u003cp\u003eThe output structure is aligned with channel isolation behavior typical in Yokogawa DCS I\/O subsystems, where galvanic separation is maintained between field circuits and system electronics through relay-based switching stages rather than semiconductor output drivers.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can ARM55D-000 outputs be hot-swapped during operation?\u003c\/strong\u003e\u003cbr\u003eA: No. Mechanical relay boards in CENTUM VP I\/O racks require system power removal or controlled maintenance mode before insertion or removal to avoid backplane transient stress.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the typical relay switching constraint for sequencing logic?\u003c\/strong\u003e\u003cbr\u003eA: Switching behavior is determined by mechanical actuation delay and contact bounce. External logic must account for millisecond-scale delay before stable contact closure is confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does each channel provide electrical isolation from adjacent channels?\u003c\/strong\u003e\u003cbr\u003eA: Each relay channel provides galvanic separation at contact level; however, isolation grouping depends on internal board layout and shared power distribution architecture.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall module only in compatible 19-inch Yokogawa FIO rack assemblies.\u003c\/li\u003e\n\u003cli\u003eEnsure 24 VDC power is fully isolated before wiring field terminals.\u003c\/li\u003e\n\u003cli\u003eUse M4 screw terminals with proper torque control to prevent loosening under vibration.\u003c\/li\u003e\n\u003cli\u003eMaintain minimum spacing for field wiring to avoid cross-contact between high-voltage switching lines.\u003c\/li\u003e\n\u003cli\u003eGround rack frame according to system cabinet grounding scheme to minimize noise coupling.\u003c\/li\u003e\n\u003cli\u003eVerify dry contact load limits before connecting inductive or capacitive field loads; external suppression may be required.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44182105227352,"sku":"ARM55D-000","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/ARM55D-000-3.jpg?v=1780541707","url":"https:\/\/www.industriaxplc.com\/ar\/products\/relay-board-module-yokogawa-arm55d-000","provider":"IndustriaX Limited","version":"1.0","type":"link"}