{"product_id":"aet4d-00-yokogawa-centum-vp-terminal-board","title":"AET4D-00 Yokogawa CENTUM VP Terminal Board","description":"\u003ch2\u003eYokogawa AET4D-00 CENTUM VP Terminal Board\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa AET4D-00\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eAET4D\u003c\/strong\u003e Analog Terminal Board, operates as a dedicated hardware component for field signal termination and cold junction compensation routing within CENTUM VP and CENTUM CS 3000 platforms. Technicians wire field transmitters, RTDs, and thermocouples directly to the M4 screw terminals on this board, which bridges field signals to analog I\/O modules such as the AAI143 and AOI143. The 16-channel assembly supports both single and dual-redundant I\/O module configurations, maintaining high signal integrity and isolation across process control loops.\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\u003eAET4D-00\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\u003e1.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e482.6 x 88.1 x 85 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive pass-through (bus powered via connected I\/O module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Capacity\u003c\/td\u003e\n\u003ctd\u003e16 channels per board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Type\u003c\/td\u003e\n\u003ctd\u003eM4 screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Modules\u003c\/td\u003e\n\u003ctd\u003eAnalog I\/O modules (e.g., AAI143, AOI143)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Signals\u003c\/td\u003e\n\u003ctd\u003eThermocouple, RTD, 4-20 mA current, VDC voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e100 Mohm minimum at 500 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstand Voltage\u003c\/td\u003e\n\u003ctd\u003e500 VAC for 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eCold Junction Compensation \u0026amp; Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eEngineers integrate the terminal board with specialized temperature acquisition loops to maintain cold junction compensation (CJC) accuracy when processing thermocouple millivolt inputs. High-grade terminal contacts restrict parasitic thermal EMF generation across the temperature boundary. Furthermore, robust dielectric isolation up to 500 VAC prevents ground loop currents and field transients from propagating along the 4-20 mA HART loop protocol lines, shielding the system backplane from field-side electrical disturbances.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the terminal board support dual-redundant analog I\/O module wiring configurations?\u003c\/p\u003e\n\u003cp\u003eA: Yes, internal signal busing allows a single terminal board to route field connections simultaneously to primary and secondary redundant analog I\/O modules.\u003c\/p\u003e\n\u003cp\u003eQ: What screw torque specification applies when terminating field wiring to the M4 terminals?\u003c\/p\u003e\n\u003cp\u003eA: Technicians should tighten the M4 terminal screws to a nominal torque of 1.2 Nm to ensure low contact resistance without damaging conductor strands.\u003c\/p\u003e\n\u003cp\u003eQ: What insulation resistance threshold does the hardware maintain between field terminals and chassis ground?\u003c\/p\u003e\n\u003cp\u003eA: The board provides an insulation resistance of 100 Mohm minimum when tested at 500 VDC across terminal blocks and mounting hardware.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the terminal board securely onto the designated 19-inch rack frame or cabinet panel using four standard mounting screws.\u003c\/li\u003e\n\u003cli\u003eVerify that all field-side power sources remain de-energized prior to attaching signal wiring to the terminal blocks.\u003c\/li\u003e\n\u003cli\u003eStrip field conductor ends to 8 mm and crimp standard ring or spade lugs onto the wire ends before inserting them under the M4 screw terminals.\u003c\/li\u003e\n\u003cli\u003eTighten all terminal screws to 1.2 Nm using a properly fitted screwdriver to prevent loose connections or micro-arcing.\u003c\/li\u003e\n\u003cli\u003eRoute thermocouple extension wires away from AC power lines and variable frequency drive cables to suppress electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eConnect signal cable shields directly to the designated cabinet grounding bar at a single point to prevent ground loop noise.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43913612001370,"sku":"AET4D-00","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/750._2e71b6d9-c2f0-4624-858c-7bd8c42046ce.jpg?v=1787715129","url":"https:\/\/www.spareoil.com\/products\/aet4d-00-yokogawa-centum-vp-terminal-board","provider":"SpareOil Automation","version":"1.0","type":"link"}