{"product_id":"sarm55w-yokogawa-centum-vp-mechanical-relay-board","title":"SARM55W Yokogawa CENTUM VP Mechanical Relay Board","description":"\u003ch2\u003eYOKOGAWA SARM55W CENTUM VP Relay Board\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYOKOGAWA SARM55W\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSARM55W\u003c\/strong\u003e Mechanical Relay Interface Terminal Board, operates as a dedicated hardware component for high-capacity contact output execution within CENTUM VP distributed control networks. The board converts low-level discrete logic command signals from primary digital output cards into high-voltage mechanical wet contact actions. This hardware arrangement provides the physical switching logic needed to drive field actuators, interlock solenoids, and motor starters without direct loading of the internal bus electronics.\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\u003eSARM55W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC internal circuit feed, Maximum 0.65 A current draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Density\u003c\/td\u003e\n\u003ctd\u003e32-point mechanical wet contact outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Support\u003c\/td\u003e\n\u003ctd\u003eConfigurable single or dual-redundant deployment matrices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Device Interface\u003c\/td\u003e\n\u003ctd\u003eM4 screw terminal blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Modules\u003c\/td\u003e\n\u003ctd\u003eADV551 (32-point DO module) + ATD5A \/ ADV561 (64-point DO module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Signal Cables\u003c\/td\u003e\n\u003ctd\u003eAKB331 (32-point standard link) \/ AKB337 (64-point high-density link)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Switching Load\u003c\/td\u003e\n\u003ctd\u003e0.6 A per point @ 250 VAC \/ 0.6 A @ 30 VDC \/ 0.1 A @ 125 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Contact Load\u003c\/td\u003e\n\u003ctd\u003e5 VDC, 10 mA operational baseline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Supply Limits\u003c\/td\u003e\n\u003ctd\u003eDual-line input (16 points per group): 250 VAC Max 9.6 A \/ 30 VDC Max 9.6 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDCS Process Control \u0026amp; Contact Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe hardware architecture leverages complete electrical channel-to-channel isolation between the internal 24 VDC execution circuits and the high-voltage wet contact field terminations. This structure isolates the control processing cards from inductive back-EMF spikes generated by field-side solenoid or motor coils. The mechanical relay array integrates directly with the system logic paths, implementing discrete operations while suppressing electromagnetic field noise that could corrupt adjacent 4-20 mA HART loop protocol pathways or analog instrumentation buses running within the same enclosure cabinet.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the dual-line field power distribution matrix operate when deploying the module in redundant configurations?\u003c\/p\u003e\n\u003cp\u003eA: The board divides the 32 discrete output points into two distinct 16-channel execution blocks. Each block accepts independent external power feeds, allowing technicians to run separate field supply loops. If one external circuit protection breaker trips, the remaining 16 channels continue switching under their own independent field power rail.\u003c\/p\u003e\n\u003cp\u003eQ: What are the consequences of driving switching loads below the 5 V, 10 mA minimum contact load threshold?\u003c\/p\u003e\n\u003cp\u003eA: Operating under the 10 mA baseline prevents the mechanical contacts from performing self-cleaning electrical arcing. Over time, surface oxidation builds up on the contact faces, increasing contact resistance and leading to sporadic open-circuit conditions or missing discrete transitions.\u003c\/p\u003e\n\u003cp\u003eQ: Can the SARM55W board interface directly with 64-point digital output modules?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The board interfaces with the 64-point ADV561 digital output card by utilizing the specialized high-density AKB337 signal cable. This matching pair splits and routes the control channels across the high-capacity M4 terminal screws.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabinet Frame Seating:\u003c\/strong\u003e Align the chassis wings with the 19-inch enclosure rails. Fasten the unit securely using standard rack screws, verifying that the assembly establishes full structural contact with the panel framework.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM4 Terminal Torque Settings:\u003c\/strong\u003e Secure all field device wiring to the M4 screw terminals using the torque values specified in the facility installation code manual. Loose terminal contacts create resistive heating points and erratic discrete operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Voltage Path Routing:\u003c\/strong\u003e Route the AKB331 or AKB337 system cables away from raw high-voltage AC cables. Maintain a minimal physical path clearance of 300 mm inside the cable trays to prevent induction noise from generating false output actions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Circulation Control:\u003c\/strong\u003e Check that vertical air passages inside the cabinet housing are entirely free of obstructions. Ensure that active heat dissipation from the 32 mechanical relays does not push the local ambient air past the 50 deg C operational limit.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43698821202010,"sku":"SARM55W","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/665..jpg?v=1784689868","url":"https:\/\/www.spareoil.com\/products\/sarm55w-yokogawa-centum-vp-mechanical-relay-board","provider":"SpareOil Automation","version":"1.0","type":"link"}