{"product_id":"lc81-b-yokogawa-rl-bus-interface-refurbished-tested-stock","title":"LC81*B YOKOGAWA RL-BUS Interface | Refurbished \u0026 Tested Stock","description":"\u003cp\u003eConfigured for process signal integration in distributed control system architectures, the \u003cstrong\u003eYOKOGAWA LC81*B\u003c\/strong\u003e (\u003cstrong\u003eLC81*B\u003c\/strong\u003e RL-Bus Interface) provides direct physical signal processing and bus coupling. This hardware component serves as the primary network interface utilized to execute analog data exchange and bus management across industrial automation 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\u003eLC81*B\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\u003eSubject to factory marking\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\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Range\u003c\/td\u003e\n\u003ctd\u003e4 to 20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e12 to 36 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eRL-Bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eAnalog Signal Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSignal Conditioning and Bus Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe LC81*B is engineered to translate standard 4-20 mA analog signals into digital data packets suitable for RL-Bus transmission. By providing a wide input voltage range (12 to 36 VDC), the module accommodates various field-side power configurations without requiring external signal conditioners. The card manages the high-speed digitization of analog process variables, ensuring that data transmitted to the control system maintains high resolution and minimal latency. Its robust operating temperature range (-20 deg C to +85 deg C) allows for deployment in high-heat industrial zones where standard electronics might otherwise experience thermal throttling or component failure.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Given that this model is typically available as used or refurbished, what diagnostic tests should be performed upon receipt?\u003c\/p\u003e\n\u003cp\u003eA: Perform a loop-back test on the analog input channels using a precision current calibrator to verify accuracy. Additionally, inspect the edge connectors for signs of contact wear or corrosion, and verify that the module initializes without hardware error codes on the system bus.\u003c\/p\u003e\n\u003cp\u003eQ: Is the 4-20 mA input isolated from the RL-Bus interface?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the LC81*B incorporates internal galvanic isolation to protect the bus circuitry from transient surges or ground loops present in the field-side analog wiring.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Loop Integrity:\u003c\/strong\u003e When connecting 4-20 mA loops, ensure the loop impedance is within the rated limits of the LC81*B. Excessive loop resistance can cause signal clipping or \"out-of-range\" errors at the controller level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Management:\u003c\/strong\u003e Despite the wide temperature rating, install the card in an area with adequate airflow to prevent excessive heat buildup, which can impact the longevity of the internal analog-to-digital converter (ADC) components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Sequencing:\u003c\/strong\u003e Ensure the 12 to 36 VDC supply is stable and noise-free. Use shielded, twisted-pair cabling for the DC input to prevent electromagnetic interference (EMI) from inducing noise into the sensitive analog measurement stage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Bond the module chassis to the system protective earth (PE) using a low-impedance connection. This is critical for maintaining signal accuracy and meeting electromagnetic compatibility standards in harsh industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":49181553590524,"sku":"LC81*B","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/LC81B.jpg?v=1781143670","url":"https:\/\/www.electronicplc.com\/ar\/products\/lc81-b-yokogawa-rl-bus-interface-refurbished-tested-stock","provider":"Electronic PLC","version":"1.0","type":"link"}