{"product_id":"yokogawa-arm55d-centum-vp-32-point-relay-output-board","title":"Yokogawa ARM55D CENTUM VP 32-Point Relay Output Board","description":"\u003ch2\u003eYokogawa ARM55D Relay Output Board\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa ARM55D-00\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eARM55D\u003c\/strong\u003e Relay Output Board, operates as a dedicated hardware component for converting controller output signals into dry contact physical switching within Yokogawa CENTUM VP and FIO node platforms. It provides direct electrical driving of inductive solenoid coils, motor contactors, and indicator circuits while isolating internal system logic from field-side electrical surges.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eARM55D\u003c\/strong\u003e: Base 32-channel mechanical relay output board platform equipped with M4 screw field terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-0\u003c\/strong\u003e: Standard functional hardware code (always designated as 0)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0\u003c\/strong\u003e: Standard 19-inch rack-mountable chassis structure\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\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\u003eARM55D-00\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\u003e48.2 cm x 18.4 cm x 13.2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e18 W maximum (with all 32 relays fully energized)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC (+\/- 10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Count\u003c\/td\u003e\n\u003ctd\u003e32 discrete relay output points (Form C \/ SPDT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e250 VAC \/ 30 VDC at 5 A per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInitial Contact Resistance\u003c\/td\u003e\n\u003ctd\u003e50 mohm maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e10 Mohm minimum at 500 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Response Time\u003c\/td\u003e\n\u003ctd\u003e12 ms maximum (energize), 8 ms maximum (de-energize)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Endurance\u003c\/td\u003e\n\u003ctd\u003e20,000,000 operations minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Wiring Terminals\u003c\/td\u003e\n\u003ctd\u003eM4 screw terminal blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Format\u003c\/td\u003e\n\u003ctd\u003eStandard 19-inch rack mounting chassis\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 and Channel-to-Channel Isolation Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe ARM55D board incorporates high-integrity galvanic isolation via mechanical relay contacts between field-side load circuits and internal backplane control electronics. This physical air-gap barrier suppresses common-mode noise and prevents inductive switching spikes from coupling into adjacent low-level 4-20 mA HART loop protocol lines or sensitive analog cables running within the same marshalling cabinet. Channel isolation maintains system ground separation, preventing field ground loops from compromising controller bus stability.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What power capacity must technicians allow for when sizing the 24 VDC field supply for the ARM55D?\u003c\/p\u003e\n\u003cp\u003eA: Engineers must size the auxiliary 24 VDC power source to deliver at least 18 W (or 750 mA) continuously to cover the coil load when all 32 output channels energize simultaneously.\u003c\/p\u003e\n\u003cp\u003eQ: Can maintenance crews perform channel troubleshooting without external measurement equipment?\u003c\/p\u003e\n\u003cp\u003eA: Yes, maintenance personnel can verify state changes instantly because 32 channel-dedicated LED status indicators on the board faceplate display the ON\/OFF actuation state of each individual relay coil.\u003c\/p\u003e\n\u003cp\u003eQ: What steps protect the relay contacts when switching highly inductive loads such as solenoid valves?\u003c\/p\u003e\n\u003cp\u003eA: Technicians must wire external snubber networks or flyback diodes directly across the inductive field load to absorb voltage spikes and prevent contact welding or erosion.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eTechnicians must mount the ARM55D chassis securely into a standard 19-inch rack frame using four dedicated mounting screws. Install the board inside a clean control enclosure that maintains ambient temperatures between -10 deg C and +55 deg C with non-condensing relative humidity below 85%. Strip field conductors to length and secure them under the M4 terminal screws, tightening each screw firmly to establish a low-resistance physical contact. Route external high-current AC or DC load wiring through separate wire troughs, keeping them apart from low-voltage analog cables and communication buses. Connect the main ground lug on the chassis to the cabinet earthing bar using a heavy copper braid strap to ensure continuous shielding against electromagnetic field interference.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43824048373850,"sku":"ARM55D","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/797.jpg?v=1786420818","url":"https:\/\/www.spareoil.com\/products\/yokogawa-arm55d-centum-vp-32-point-relay-output-board","provider":"SpareOil Automation","version":"1.0","type":"link"}