{"product_id":"arm55d-relay-board-yokogawa","title":"ARM55D Relay Board Yokogawa","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa ARM55D\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eARM55D\u003c\/strong\u003e Relay Board, operates as a dedicated hardware component for mechanical dry contact output signal distribution within distributed control systems.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSuffix\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e-0\u003c\/td\u003e\n\u003ctd\u003eStandard fixed configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003ctd\u003e19-inch rack mountable form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eO\u003c\/td\u003e\n\u003ctd\u003eBasic functional type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\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\u003eStandard industrial ambient range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eNot applicable (Passive relay drive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Points\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Type\u003c\/td\u003e\n\u003ctd\u003eMechanical \"a\" contact (NO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e10 MOhm at 500 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Type\u003c\/td\u003e\n\u003ctd\u003eM4 screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMechanical Relay Logic and Isolation\u003c\/h3\u003e\n\u003cp\u003eThe ARM55D provides 32 points of mechanical relay output, supporting both single and dual-redundant control configurations. The board utilizes dry contact (NO) outputs to provide complete electrical isolation between the control system logic and the field-level load circuitry. This isolation is critical for preventing high-voltage transients or ground faults from migrating back to the DCS output modules. The robust M4 screw terminal interface ensures low-resistance contact for high-density field wiring, and the insulation resistance specification of 10 MOhm ensures reliable performance in industrial environments.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can this board be used in a redundant control configuration?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the ARM55D is specifically engineered to support either single or dual-redundant control output architectures, allowing for high availability in critical process loops.\u003c\/p\u003e\n\u003cp\u003eQ: Is the ARM55D suitable for mounting in standard 19-inch cabinets?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the board is designed with a 0-suffix code that specifies compatibility with standard 19-inch rack mounting systems.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the 19-inch rack-compatible chassis securely to the cabinet rails using the appropriate mounting hardware to ensure structural stability.\u003c\/li\u003e\n\u003cli\u003eVerify that all 32 channels are wired with conductors appropriate for M4 screw terminals, ensuring each terminal is tightened to the manufacturer-recommended torque.\u003c\/li\u003e\n\u003cli\u003eEnsure that the total current draw of the field-side loads does not exceed the mechanical relay contact ratings to prevent welding or premature wear of the relay elements.\u003c\/li\u003e\n\u003cli\u003eMaintain proper cable routing for field devices, utilizing cable ducts to keep logic and power wiring separated and minimize induced noise on the relay contacts.\u003c\/li\u003e\n\u003cli\u003ePeriodically inspect the screw terminal connections, particularly in high-vibration areas, to ensure connections remain secure and free of oxidation.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":49208321802492,"sku":"ARM55D","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/ARM55D1.jpg?v=1781761284","url":"https:\/\/www.electronicplc.com\/products\/arm55d-relay-board-yokogawa","provider":"Electronic PLC","version":"1.0","type":"link"}