{"product_id":"yokogawa-aep9d-secondary-power-supply-bus-unit","title":"Yokogawa AEP9D Secondary Power Supply Bus Unit","description":"\u003ch2\u003eYokogawa AEP9D Secondary Power Supply Bus Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa AEP9D-4\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAEP9D\u003c\/strong\u003e Secondary Power Supply Bus Unit, operates as a dedicated hardware component for distributing stable 24 VDC secondary power within CENTUM VP and CENTUM 3000 DCS cabinets. It receives dual-line inputs and delivers independent 9-output branches per line to connected terminal boards and sub-modules.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModelBrand\u003c\/td\u003e\n\u003ctd\u003eAEP9D\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\u003e1.8 kg nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e160 mm x 130 mm x 45 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperatingTemp\u003c\/td\u003e\n\u003ctd\u003e0 degC to 55 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowerConsumption\u003c\/td\u003e\n\u003ctd\u003eMax input current: 20 A total; 10 A per port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputPowerSupplyVoltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstandingVoltage\u003c\/td\u003e\n\u003ctd\u003e500 V AC, 1 min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputPorts\u003c\/td\u003e\n\u003ctd\u003e9 per line, 3-pin MATE-N-LOK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandardsConformance\u003c\/td\u003e\n\u003ctd\u003eCSA, CE Marking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputTerminals\u003c\/td\u003e\n\u003ctd\u003eLine A\/B: +24P, –24N; FG functional ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputPinAssignments\u003c\/td\u003e\n\u003ctd\u003ePin1: FG, Pin2: –24N, Pin3: +24P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAEP9D\u003c\/strong\u003e ensures electrical isolation between Line A and Line B output channels, preventing cross-channel interference. Each output port maintains separation from adjacent ports to minimize ground loop currents and protect downstream control modules. This isolation supports stable 4-20 mA HART loop signaling and prevents propagation of transient voltage spikes across connected devices.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the AEP9D support hot-swapping of input lines?\u003cbr\u003eA: Input lines can be maintained individually; however, hot-swap procedures require sequential disconnection to avoid output voltage collapse on dependent loads.\u003c\/p\u003e\n\u003cp\u003eQ: What is the switching behavior during line redundancy activation?\u003cbr\u003eA: Switching between Line A and Line B occurs automatically without mechanical relays, ensuring minimal transient impact within 1-2 ms for downstream circuits.\u003c\/p\u003e\n\u003cp\u003eQ: Can the output ports handle extended cable runs without voltage drop?\u003cbr\u003eA: The outputs are designed for distribution within the standard cabinet environment. For runs exceeding 5 m, voltage drop must be evaluated according to cable AWG and current rating.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the AEP9D on a grounded DIN rail or bracket ensuring functional ground connection to cabinet chassis.\u003c\/li\u003e\n\u003cli\u003eRoute Line A and Line B separately, avoiding parallel routing to high-power AC conductors.\u003c\/li\u003e\n\u003cli\u003eConnect each output branch to intended terminal boards using 3-pin MATE-N-LOK connectors, maintaining polarity (+24P, –24N, FG).\u003c\/li\u003e\n\u003cli\u003eVerify total input current does not exceed 20 A; balance loads per line to prevent thermal overload.\u003c\/li\u003e\n\u003cli\u003eEnsure environmental airflow allows operation within 0 degC to 55 degC; avoid obstructing cooling paths.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44208990290008,"sku":"AEP9D","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/AEP9D.jpg?v=1780971274","url":"https:\/\/www.industriaxplc.com\/products\/yokogawa-aep9d-secondary-power-supply-bus-unit","provider":"IndustriaX Limited","version":"1.0","type":"link"}