{"product_id":"alp121-s01-yokogawa-profibus-dp-communication-module","title":"ALP121-S01 Yokogawa PROFIBUS-DP Communication Module","description":"\u003cp\u003eConfigured for high-speed fieldbus integration in distributed control platforms, the \u003cstrong\u003eYokogawa ALP121-S01\u003c\/strong\u003e (\u003cstrong\u003eALP121\u003c\/strong\u003e Communication Module) provides direct physical and electrical execution of PROFIBUS-DP network data exchange.\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\u003eALP121-S01\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\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.7 A at 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003ePROFIBUS-DP (RS-485)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Transfer Rates\u003c\/td\u003e\n\u003ctd\u003e9600 bps to 12 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003e1 port (D-sub 9-pin female)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Isolation\u003c\/td\u003e\n\u003ctd\u003eField to system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe ALP121-S01 module enables seamless interface between DCS controllers and PROFIBUS-DP compliant field devices, utilizing EIA-RS-485 physical layer standards. The module employs rigorous field-to-system signal isolation to protect internal logic from ground potential differences and common-mode transients. Integrated cold junction compensation (CJC) logic is available for compatible I\/O sub-assemblies when integrated into larger process control frames. To maintain data integrity over 1200 meter distances, the module utilizes active termination monitoring, ensuring low signal distortion at varying baud rates.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the ALP121-S01 module be hot-swapped while the PROFIBUS-DP network is active?\u003c\/p\u003e\n\u003cp\u003eA: Hot-swapping is not supported for this module. The host base unit power must be disabled to prevent bus communication collisions and potential damage to the RS-485 transceiver circuitry.\u003c\/p\u003e\n\u003cp\u003eQ: How is the maximum transmission distance correlated with the baud rate?\u003c\/p\u003e\n\u003cp\u003eA: The transmission distance is inversely proportional to the data transfer speed. While the module supports up to 12 Mbps, the maximum 1200-meter range is only achievable at the lowest baud rate of 9600 bps. High-speed communication requires significantly shorter cable runs to minimize signal attenuation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the module into a compatible Yokogawa control chassis, ensuring the backplane connector is fully seated.\u003c\/li\u003e\n\u003cli\u003eUtilize high-quality shielded twisted-pair cabling for the PROFIBUS-DP link; ensure the shield is bonded to a low-impedance earth ground to prevent noise injection.\u003c\/li\u003e\n\u003cli\u003eConfigure the D-sub 9-pin connection according to the RS-485 standard (Pin 3: B-line, Pin 8: A-line); ensure the cable connector housing provides proper electromagnetic shielding.\u003c\/li\u003e\n\u003cli\u003eVerify that the bus is terminated at both physical ends with 220 Ohm resistors to prevent signal reflections that cause communication errors.\u003c\/li\u003e\n\u003cli\u003eConfirm the power supply provides a steady 24 V DC; the module draws up to 0.7 A, so ensure the power distribution segment is sized appropriately for the load.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":49221196316924,"sku":"ALP121-S01","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/ALP121-S00.jpg?v=1781487118","url":"https:\/\/www.electronicplc.com\/ar\/products\/alp121-s01-yokogawa-profibus-dp-communication-module","provider":"Electronic PLC","version":"1.0","type":"link"}