{"product_id":"sarm15a-mechanical-relay-contactinput-module-yokogawa","title":"SARM15A | Mechanical Relay ContactInput Module | Yokogawa","description":"\u003ch2\u003eYokogawa SARM15A Mechanical Relay ContactInput Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for dry contact acquisition in CENTUM VP field input architecture, the \u003cstrong\u003eYokogawa SARM15A\u003c\/strong\u003e (\u003cstrong\u003eARM15A\u003c\/strong\u003e Mechanical Relay Contact Input Module) provides direct physical\/electrical execution for 32-point relay contact sensing across Yokogawa FIO input subsystems.\u003c\/p\u003e\n\u003cp\u003eThe module implements a mechanical relay interface layer between field contact devices and downstream DI modules, translating contact resistance states into defined electrical ON\/OFF thresholds under 24 VDC excitation. Redundant-capable field wiring supports dual-line power distribution per 16-point segment, enabling segmented field energization and controlled signal acquisition. Signal integrity is maintained through high off-state impedance discrimination and defined low-resistance ON detection boundaries.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eSARM15A \/ ARM15A refers to a fixed mechanical relay contact input module designation within Yokogawa FIO hardware line. No further publicly defined suffix segmentation is specified in the provided technical dataset.\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\u003ctd\u003eModelBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa SARM15A \/ ARM15A\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\u003eapprox. 2.2 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\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 internal circuit, max 0.32 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Capacity\u003c\/td\u003e\n\u003ctd\u003e32-point mechanical relay contact input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Termination\u003c\/td\u003e\n\u003ctd\u003eM4 screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eON Threshold\u003c\/td\u003e\n\u003ctd\u003e150 ohm or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOFF Threshold\u003c\/td\u003e\n\u003ctd\u003e200 kohm or greater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Supply\u003c\/td\u003e\n\u003ctd\u003e24 VDC dual-line, max 0.3 A per line\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\u003eWithstand Voltage\u003c\/td\u003e\n\u003ctd\u003eup to 1.5 kVAC (field to case interface)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch2\u003eYokogawa Process Input Channel Architecture\u003c\/h2\u003e\n\u003ch3\u003eChannel-to-Channel Electrical Segregation Behavior\u003c\/h3\u003e\n\u003cp\u003eWithin Yokogawa FIO input structures, relay-based contact acquisition modules such as SARM15A implement physical channel grouping combined with electrical segmentation per 16-point field power domain. This structure reduces cross-point coupling under 24 VDC excitation conditions, particularly during simultaneous switching of mechanically driven dry contacts. The architecture maintains deterministic ON\/OFF threshold interpretation through fixed resistance window discrimination rather than analog scaling methods such as 4-20 mA or HART-based loop evaluation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the module be hot-swapped under energized field conditions?\u003cbr\u003eA: The module is not designed for field-side hot swapping. Removal requires de-energization of field 24 VDC supply lines and isolation of backplane interface to prevent contact arcing and signal corruption.\u003c\/p\u003e\n\u003cp\u003eQ: What is the electrical interpretation mechanism for ON\/OFF states?\u003cbr\u003eA: ON state is determined by contact resistance below or equal to 150 ohm. OFF state is defined by resistance equal to or above 200 kohm, forming a discrete threshold window without analog interpolation.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module provide per-channel electrical isolation?\u003cbr\u003eA: Isolation is implemented at field power segmentation level and internal circuit isolation barriers, rather than fully independent per-channel galvanic isolation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure 24 VDC field supply is fully isolated before terminal engagement.\u003c\/li\u003e\n\u003cli\u003eMaintain M4 screw torque within standard industrial control cabinet tightening practice to prevent intermittent contact resistance drift.\u003c\/li\u003e\n\u003cli\u003eRoute field cables (AKB331) separately from high-noise power conductors to avoid induced switching noise on dry contact lines.\u003c\/li\u003e\n\u003cli\u003eVerify insulation resistance before energizing field loop, minimum 10 Mohm at 500 VDC test condition.\u003c\/li\u003e\n\u003cli\u003eMaintain proper grounding of rack frame to reduce common-mode noise coupling into relay detection circuits.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44214272950360,"sku":"SARM15A","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/SARM15A-3.jpg?v=1781060429","url":"https:\/\/www.industriaxplc.com\/products\/sarm15a-mechanical-relay-contactinput-module-yokogawa","provider":"IndustriaX Limited","version":"1.0","type":"link"}