{"product_id":"yokogawa-ant502-50-bu1a-optical-esb-bus-repeater-slave","title":"Yokogawa ANT502-50\/BU1A Optical ESB Bus Repeater Slave","description":"\u003ch2\u003eYokogawa ANT502-50\/BU1A Optical ESB Bus Repeater Slave Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa ANT502-50\/BU1A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eANT502\u003c\/strong\u003e Optical ESB Bus Repeater Slave Module, operates as a dedicated hardware component for converting optical ESB signals back into electrical bus signals within CENTUM VP, CS 3000, and ProSafe-RS control networks.\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\u003eANT502-50\/BU1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa Electric Corporation\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\u003e32.8 x 142.5 x 130 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +55 deg C (up to +70 deg C with cabinet airflow rules)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.5 A (from 5 VDC backplane bus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eOptical ESB Bus Repeater (Slave Side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Medium\u003c\/td\u003e\n\u003ctd\u003eOptical fiber cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Range\u003c\/td\u003e\n\u003ctd\u003e5 km per stage (10 km maximum across dual-stage topologies)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Topology\u003c\/td\u003e\n\u003ctd\u003eStar or chain configurations (up to 8 node connections)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Unit\u003c\/td\u003e\n\u003ctd\u003eIntegrated BU1A connector unit for direct ESB connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFieldbus Connectivity \u0026amp; Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe ANT502-50\/BU1A slave repeater receives modulated optical pulses transmitted from an upstream ANT401 master module and reconstructs electrical ESB bus frames for local I\/O expansion racks. Fiber optic communication yields complete galvanic channel-to-channel isolation between remote field control stations, shielding analog loop processors and 4-20 mA HART loop protocol instruments from severe electromagnetic noise, electrical surges, and ground potential differentials across dispersed plant units.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the ANT502-50\/BU1A module be replaced without powering down the field I\/O node?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The ANT502-50\/BU1A supports online hot-swapping within compatible Yokogawa node units. Replacing the module under live backplane power does not cause logic interruptions or voltage dips on adjacent backplane cards.\u003c\/p\u003e\n\u003cp\u003eQ: What purpose does the HKU interface serve when paired with the ANT502-50\/BU1A?\u003c\/p\u003e\n\u003cp\u003eA: The optional Housekeeping Unit (HKU) interface allows the ANT502-50\/BU1A to transmit cabinet environmental monitoring signals—such as internal temperature alarms and fan power status—directly back to the central host controller over the optical bus link.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eSeat the ANT502-50\/BU1A vertically into the designated node chassis slot, tightening the upper and lower panel retention screws to maintain a continuous ground reference to the enclosure backplate. Secure the BU1A connector block to the front interface, and connect the optical fiber lines ensuring clean LC connectors are fully engaged. Maintain at least 50 mm of passive ventilation clearance above and below the module rack assembly to operate within the specified temperature limits. Route optical patch cables through dedicated wire raceways to maintain minimum bending radius thresholds and prevent fiber core stress.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43895507353690,"sku":"ANT502-50\/BU1A","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/55._780b718a-91ba-48bb-a4ad-00820870e7cf.jpg?v=1787537349","url":"https:\/\/www.spareoil.com\/products\/yokogawa-ant502-50-bu1a-optical-esb-bus-repeater-slave","provider":"SpareOil Automation","version":"1.0","type":"link"}