{"product_id":"yokogawa-adm55-2-plc-module","title":"Yokogawa ADM55-2 PLC Module","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa ADM55-2\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eADM55-2\u003c\/strong\u003e PLC Module, operates as a dedicated hardware component for digital relay signal execution and dry-contact output switching within CENTUM and related industrial machine control networks. Installed directly in a relay I\/O module nest, this rack-mounted board provides direct physical\/electrical execution by driving internal mechanical relay gates to close or open external pilot circuits based on digital command bytes sent over the subrack backplane.\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\u003eADM55-2\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\u003e0.30 lbs (0.136 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Method\u003c\/td\u003e\n\u003ctd\u003eRack-mounted, installed inside a dedicated relay I\/O module nest\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\u003e2 A or less at 5.0 V DC (Internal logic rail draw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Product Type\u003c\/td\u003e\n\u003ctd\u003ePLC Module \/ Relay Output Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Output Rating\u003c\/td\u003e\n\u003ctd\u003e250 V AC (1.5 A or less) \/ 125 V DC (0.1 A or less) \/ 24 V DC (1.5 A or less)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Contact Load\u003c\/td\u003e\n\u003ctd\u003e5 V, 10 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Format Profile\u003c\/td\u003e\n\u003ctd\u003eForm C Configuration: A-contact (Terminals A-C), B-contact (Terminals B-C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Operation Time\u003c\/td\u003e\n\u003ctd\u003e10 ms or less (Energize latch delay)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Return Time\u003c\/td\u003e\n\u003ctd\u003e10 ms or less (De-energize release delay)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField I\/O Wiring\u003c\/td\u003e\n\u003ctd\u003eConnected via M4 screws to the relay I\/O nest terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003eAt least 10 Mohms at 500 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstanding Voltage\u003c\/td\u003e\n\u003ctd\u003e1.5 kV (Field to case) \/ 500 V (24V power to case) \/ 1.5 kV (24V power to field)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-Line Maintenance Mode\u003c\/td\u003e\n\u003ctd\u003eHolds output at current status output mode during active servicing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and System Integration\u003c\/h3\u003e\n\u003cp\u003eThe ADM55-2 coordinates with localized nest controller interfaces to maintain baseline backplane bus communication velocity metrics, validating logic state transitions within a deterministic cycle time to eliminate transmission lag or processing drift. By isolating the inductive relay coil drive circuitry from the core microprocessing plane, the card accommodates dense physical I\/O scaling routines without exposing the shared backplane data channels to inductive EMI or spikes. The card architecture retains full firmware flash compatibility with upstream engineering software blocks, giving processing units the capacity to monitor real-time contact states and read localized diagnostic variables directly across the nest bus.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What precise electrical behavior occurs on the field contact terminals if the ADM55-2 is set to On-Line Maintenance mode?\u003c\/p\u003e\n\u003cp\u003eA: When placed into maintenance mode, the module freezes its coil drivers and holds the output contacts at their current status. This allows technicians to perform diagnostic routines on upstream controllers without dropping field interlocks or cycling connected valve solenoids.\u003c\/p\u003e\n\u003cp\u003eQ: What is the mechanical life expectancy penalty if the external field load drops below the 5 V, 10 mA minimum rating?\u003c\/p\u003e\n\u003cp\u003eA: Operating below 5 V, 10 mA prevents the physical contact points from executing electrical arcing\/cleaning actions. Without this self-cleaning current, microscopic surface oxidation builds up over time, increasing contact resistance and causing intermittent open-circuit faults.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45054355210355,"sku":"ADM55-2","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-05-29_10-16-44_b0039c5c-ba1d-4067-85f2-5d6b92eb0067.png?v=1780021106","url":"https:\/\/www.dcssupplier.com\/products\/yokogawa-adm55-2-plc-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}