{"product_id":"yokogawa-vja1-027-aaa0-vja-series-4-20ma-isolated-dual-output-distributor","title":"Yokogawa VJA1-027-AAA0 VJA Series 4-20mA Isolated Dual Output Distributor","description":"\u003ch2\u003eYokogawa VJA1-027-AAA0 Compact Plug-in Signal Splitter\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa VJA1-027-AAA0\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eVJA1\u003c\/strong\u003e Isolated Dual-Output Distributor, operates as a dedicated hardware component for converting 4-20 mA DC field transmitter signals into dual isolated outputs within DCS signal conditioning racks.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eModel \/ Suffix Code\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\u003e\u003cstrong\u003eVJA1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCompact Plug-in Type Signal Conditioner Distributor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-0\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC Input Signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC Output-1 Signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e7\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC Output-2 Signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85-264 V AC \/ 15-30 V DC Universal Power Supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e0\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlways 0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003eVJA1-027-AAA0\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\u003e0.20 kg (0.43 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard VJA series plug-in module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e3.2 W at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC (250 ohm input resistance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signals\u003c\/td\u003e\n\u003ctd\u003eDual 4-20 mA DC (Output-1 \u0026lt;= 750 ohm, Output-2 \u0026lt;= 350 ohm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitter Power Supply\u003c\/td\u003e\n\u003ctd\u003e25.25 +\/- 0.25 V DC (current limited to 25-35 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Rating\u003c\/td\u003e\n\u003ctd\u003e2000 V AC for 1 minute (Input-Output-Power-Ground)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.1% of span\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol \u0026amp; Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe Yokogawa VJA1-027-AAA0 supplies auxiliary 25.25 VDC loop power to two-wire transmitters while processing incoming analog measurement signals. Galvanic 3-way isolation (2000 VAC withstand rating across input, dual output, and power supply circuit paths) eliminates ground loop noise and prevents field-side electrical surges from propagating into control system I\/O cards. The dual-channel output section duplicates the 4-20 mA HART loop protocol current signal, allowing engineers to route independent isolation channels simultaneously to local indicators and central DCS controllers without signal attenuation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What happens to the transmitter power supply if a short circuit occurs in the field wiring?\u003c\/p\u003e\n\u003cp\u003eA: The internal transmitter power supply unit limits current output automatically between 25 mA and 35 mA to protect internal transformer elements from overcurrent damage.\u003c\/p\u003e\n\u003cp\u003eQ: Can Output-1 and Output-2 drive different maximum loop impedance loads?\u003c\/p\u003e\n\u003cp\u003eA: Yes, Output-1 supports loop loads up to 750 ohm, whereas Output-2 supports maximum load resistance up to 350 ohm.\u003c\/p\u003e\n\u003cp\u003eQ: How do operators calibrate zero and span drift on this unit?\u003c\/p\u003e\n\u003cp\u003eA: Front-panel trimming potentiometers provide manual zero adjustments within -5% to +5% of span and span adjustments within 95% to 105% of span.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eField technicians must observe the following installation requirements when deploying the module:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eSeat the plug-in terminal module into its matching DIN-rail or wall-mount socket base until the latching tabs click securely into place.\u003c\/li\u003e\n\u003cli\u003eConnect input wiring using twisted-shielded pair cables, terminating the cable shield at a single dedicated cabinet earth point to block EMI noise.\u003c\/li\u003e\n\u003cli\u003eVerify external load resistance on Output-1 stays at or below 750 ohm and Output-2 stays at or below 350 ohm prior to loop energization.\u003c\/li\u003e\n\u003cli\u003eMaintain a 10 mm clearance around the housing vents to facilitate natural thermal convection and prevent internal heat accumulation.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43901616652378,"sku":"VJA1-027-AAA0","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/75_3d898dfb-9290-4d32-a973-bfda5154abcc.jpg?v=1787626994","url":"https:\/\/www.spareoil.com\/products\/yokogawa-vja1-027-aaa0-vja-series-4-20ma-isolated-dual-output-distributor","provider":"SpareOil Automation","version":"1.0","type":"link"}