{"product_id":"alr121-s50-s1-yokogawa-communication-module-new-original-stock","title":"ALR121-S50 S1 Yokogawa Communication Module | New \u0026 Original Stock","description":"\u003cp\u003eConfigured for serial communication within distributed control systems, the \u003cstrong\u003eYokogawa ALR121-S50 S1\u003c\/strong\u003e (\u003cstrong\u003eALR121-S50\u003c\/strong\u003e Communication Module) provides direct physical signal bridging between field-level devices and the system 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\u003eALR121-S50 S1\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\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2.2 cm x 12.4 cm x 12.6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane powered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFOUNDATION Fieldbus and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe ALR121-S50 S1 module serves as a specialized serial communication interface (RS-232\/RS-422\/RS-485), supporting data exchange between controllers and external peripheral devices. To ensure network integrity, the module incorporates robust galvanic isolation across its communication ports, which effectively mitigates ground loop interference and high-frequency noise typical in industrial environments. This design allows for reliable, deterministic data transfer between disparate process loops without compromising the stability of the central backplane bus.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the ALR121-S50 S1 support hot-swapping under power?\u003c\/p\u003e\n\u003cp\u003eA: No, the module requires a controlled power-down procedure and system-level decommissioning before physical removal to prevent backplane bus errors or circuit component damage.\u003c\/p\u003e\n\u003cp\u003eQ: What serial protocols are natively supported by this communication module?\u003c\/p\u003e\n\u003cp\u003eA: The module is designed for standard serial interface protocols (RS-232\/RS-422\/RS-485) and is configured via software to align with the specific baud rate and parity requirements of the connected field instrument.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure the module is fully inserted into the designated I\/O rack slot until the retention mechanism clicks, ensuring complete alignment with the backplane connectors.\u003c\/li\u003e\n\u003cli\u003eUse shielded, twisted-pair cabling for all serial connections, ensuring the cable shield is terminated at the cabinet's designated grounding bar to minimize EMI coupling.\u003c\/li\u003e\n\u003cli\u003eVerify that the communication protocol settings (baud rate, parity, stop bits) are correctly matched between the ALR121-S50 and the target field device before initializing the network.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum separation of 10 cm from high-power AC lines to prevent induced signal distortions on the serial communication channels.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":49203387433212,"sku":"ALR121-S50 S1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/ALR121-S50_S1.jpg?v=1781575122","url":"https:\/\/www.electronicplc.com\/products\/alr121-s50-s1-yokogawa-communication-module-new-original-stock","provider":"Electronic PLC","version":"1.0","type":"link"}