{"product_id":"alr121-s53-yokogawa-communication-module-new-original-stock","title":"ALR121-S53 Yokogawa Communication Module | New \u0026 Original Stock","description":"\u003ch2\u003eYokogawa ALR121-S53 CENTUM Series Serial Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa ALR121-S53\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eALR121\u003c\/strong\u003e Serial Communication Module, operates as a dedicated hardware component for serial data translation between the Field Control Station (FCS) and subsystems within CENTUM VP, CS3000, and ProSafe-RS FIO platforms.\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\u003eALR121-S53\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\u003e0.34 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard FIO slot form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +60 deg C (Standard environmental limits; alternative listings specify -40 to +70 deg C based on suffix options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eCurrent Consumption: 0.5 A (Alternatively specified as 230 mA @ 5 VDC, 540 mA @ 24 VDC variant paths)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Configuration\u003c\/td\u003e\n\u003ctd\u003eSerial Communication Module supporting RS-422\/RS-485 physical layer interfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Paths\u003c\/td\u003e\n\u003ctd\u003ePoint-to-point or multipoint architecture topologies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Input Adaptation\u003c\/td\u003e\n\u003ctd\u003eS53 version acts as standard serial handler (Pure analog conversion data maps 16 channels, 4-20 mA, voltage, TC, RTD inputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Isolation\u003c\/td\u003e\n\u003ctd\u003eChannel-to-channel and channel-to-system galvanic isolation (1500 VAC for 1 minute)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Precision\u003c\/td\u003e\n\u003ctd\u003e+-0.1% of span (at 25 deg C), +-0.2% over full temperature range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuffix Protocol\u003c\/td\u003e\n\u003ctd\u003e-S Standard type, no explosion protection, non-HART native processing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; DCS Instrumentation Properties\u003c\/h3\u003e\n\u003cp\u003eThe Yokogawa ALR121-S53 implements rigorous channel-to-channel isolation circuits to intercept common-mode voltage spikes and prevent ground loop cross-talk across its network layout. The hardware processes multi-drop RS-422\/RS-485 data blocks or standard analog signal distributions without loading down central backplane processors. When handling raw sensor inputs, the internal logic utilizes built-in cold junction compensation (CJC) to balance raw thermocouple drifts, executing real-time open-circuit wire diagnostics while blocking signal distortion down to a typical 10 ms update rate.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the ALR121-S53 module provide direct HART loop protocol pass-through to the master DCS?\u003c\/p\u003e\n\u003cp\u003eA: No, the S53 version is standard non-Explosion protected and does not process digital HART data overlay packets. For full HART device diagnostics and asset management communications, you must install the alternative H suffix variant module (ALR121-H53).\u003c\/p\u003e\n\u003cp\u003eQ: What are the installation restrictions regarding unassigned input channels on the termination block?\u003c\/p\u003e\n\u003cp\u003eA: Unused analog tracking channels must be physically short-circuited at the terminal block interface or explicitly set to disabled in the system builder workspace. Leaving unassigned loops open allows electrostatic fields to generate induction noise, causing false diagnostic faults.\u003c\/p\u003e\n\u003cp\u003eQ: How is primary loop power distributed to passive two-wire field transmitters when utilizing this module?\u003c\/p\u003e\n\u003cp\u003eA: The module functions as an isolated signal sink interface and lacks integrated power supply rails for external loop circuits. Transmitters operating on a two-wire structure require external power distribution blocks or a dedicated powered terminal board assembly to drive the current path.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFIO Slot Interlocking:\u003c\/strong\u003e Align the module frame with the active slot paths of the CENTUM FIO backplane. Press firmly to achieve complete connector seat compliance, then lock the physical retention screws to secure a dependable chassis ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Link Shield Grounding:\u003c\/strong\u003e Route all RS-422\/RS-485 communication or analog field wiring using high-integrity twisted-pair, double-shielded copper cable. Connect the shield drain wire exclusively to the designated cabinet earth grounding bus to prevent ground loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Track Separation:\u003c\/strong\u003e Ensure all serial data wires and low-voltage input loops (such as millivolt lines or RTD inputs) retain a physical separation of no less than 30 cm from high-amperage AC supply tracks, motor starters, or inductive switching arrays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermination Torque Constraints:\u003c\/strong\u003e Secure all field conductors at the pressure clamp terminal block using calibrated screwdrivers. Loose terminal seating raises local circuit resistance, degrading the conversion accuracy across the 10 ms signal evaluation span.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43497821667418,"sku":"ALR121-S53","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/99.1_6da4cee5-c716-42bf-8b33-dabe0e7f30a1.jpg?v=1781511567","url":"https:\/\/www.spareoil.com\/products\/alr121-s53-yokogawa-communication-module-new-original-stock","provider":"SpareOil Automation","version":"1.0","type":"link"}