{"product_id":"yokogawa-arm55d-000-32-channel-mechanical-relay-board","title":"Yokogawa ARM55D-000 | 32-Channel Mechanical Relay Board","description":"\u003ch3\u003e\n\u003cstrong\u003eOverview\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eARM55D-000\u003c\/strong\u003e is a 32-channel mechanical relay interface board manufactured by Yokogawa Electric Corporation for use within the CENTUM VP distributed control system. This unit is designed to safely interface digital I\/O modules with field-side devices by providing galvanic isolation through dry-contact mechanical relays.\u003c\/p\u003e\n\u003cp\u003eInstalled in a 19-inch rack and connected via Yokogawa FIO subsystem cabling, the board ensures reliable signal switching in electrically noisy industrial environments where protection of control electronics is critical.\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eFunctional Characteristics\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eARM55D-000\u003c\/strong\u003e relay board converts digital output signals from Yokogawa I\/O modules into isolated dry-contact outputs. Each channel uses a normally open “a-contact” mechanical relay, suitable for both single and dual-redundant system architectures.\u003c\/p\u003e\n\u003cp\u003eMechanical isolation protects upstream control hardware from voltage transients, ground loops, and field wiring faults, making the board suitable for safety-related and mission-critical control circuits.\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\nModel: \u003cstrong\u003eARM55D-000\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\nProduct Category: Mechanical Relay Board\n\u003c\/li\u003e\n\u003cli\u003e\nRelay Type: Dry Contact, Normally Open (a-contact)\n\u003c\/li\u003e\n\u003cli\u003e\nNumber of Channels: 32\n\u003c\/li\u003e\n\u003cli\u003e\nRated Control Voltage: 24 V DC\n\u003c\/li\u003e\n\u003cli\u003e\nMaximum Switching Current: 650 mA per channel\n\u003c\/li\u003e\n\u003cli\u003e\nInsulation Resistance: Minimum 10 MΩ at 500 V DC\n\u003c\/li\u003e\n\u003cli\u003e\nField Wiring Terminals: M4 screw terminals\n\u003c\/li\u003e\n\u003cli\u003e\nMounting Method: 19-inch rack mount\n\u003c\/li\u003e\n\u003cli\u003e\nCompatible Signal Cables: Yokogawa AKB331 series\n\u003c\/li\u003e\n\u003cli\u003e\nSupported I\/O Modules: ADV151, ATD5A digital I\/O modules\n\u003c\/li\u003e\n\u003cli\u003e\nSystem Compatibility: CENTUM VP, FIO subsystem\n\u003c\/li\u003e\n\u003cli\u003e\nDimensions: 184 × 482 × 132 mm\n\u003c\/li\u003e\n\u003cli\u003e\nWeight: 3.20 lbs\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n\u003cstrong\u003eSystem Integration\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eARM55D-000\u003c\/strong\u003e is engineered for seamless integration into Yokogawa FIO-based architectures. It is commonly deployed between digital output modules and field actuators such as solenoid valves, contactors, interposing relays, and alarm devices.\u003c\/p\u003e\n\u003cp\u003eThe board supports redundant configurations when paired with compatible I\/O modules, enhancing system availability in high-reliability installations.\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eChemical and petrochemical processing plants\r\nOil and gas production and refining facilities\r\nThermal and nuclear power generation\r\nFood and beverage manufacturing systems\r\nProcess safety and interlock circuits\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eModel Clarification\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe ARM55D series includes multiple variants. While the \u003cstrong\u003eARM55D-000\u003c\/strong\u003e represents the standard basic type, suffix variations may differ in mounting or redundancy options. Always verify exact suffix compatibility with your CENTUM VP system revision prior to procurement.\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eFAQ\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat type of contacts does the ARM55D-000 use\u003c\/strong\u003e\r\nThe board provides 32 normally open mechanical dry-contact relay outputs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this board suitable for redundant DCS architectures\u003c\/strong\u003e\r\nYes. When used with compatible Yokogawa digital I\/O modules, the board supports single and dual-redundant configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the board provide electrical isolation\u003c\/strong\u003e\r\nYes. Each relay channel provides galvanic isolation between control-side electronics and field wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich signal cables are required\u003c\/strong\u003e\r\nThe board is designed for use with Yokogawa AKB331 series signal cable assemblies.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":52761988464925,"sku":"ARM55D-000","price":9.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/5387\/3181\/files\/ARM55D-000-2_1000.jpg?v=1787221929","url":"https:\/\/www.6gcontrols.com\/products\/yokogawa-arm55d-000-32-channel-mechanical-relay-board","provider":"6G Controls","version":"1.0","type":"link"}