{"product_id":"ca0-a-interface-module-yokogawa","title":"CA0*A Interface Module | Yokogawa","description":"\u003cp\u003eConfigured for field signal interfacing in legacy DCS architectures, the \u003cstrong\u003eYokogawa CA0*A\u003c\/strong\u003e (\u003cstrong\u003eCAO\u003c\/strong\u003e Interface Module) provides direct physical\/electrical execution. It handles signal routing, conditioning, and isolation between field-side instrumentation and system-side backplane communication buses.\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\u003eCA0*A (CAO Suffix A)\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\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane bus powered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC system power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Conditioning\u003c\/td\u003e\n\u003ctd\u003eBuilt-in Zero and Span calibration potentiometers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eCard-edge backplane bus interface card\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 and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe CA0*A module incorporates internal analog signal conditioning networks to stabilize field instrumentation inputs prior to digital quantization across the system backplane. Optimized for 4-20 mA HART loop protocol signaling, the interface board features front-panel Zero and Span calibration controls to correct for field transmitter drift and loop impedance variations. Internal channel-to-channel isolation circuits suppress ground loop voltages and electromagnetic cross-talk, preventing electrical noise from propagating into the central control processor logic.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the purpose of the front-panel SPAN and ZERO potentiometers on the CA0*A module?\u003c\/p\u003e\n\u003cp\u003eA: The SPAN and ZERO potentiometers allow manual analog calibration adjustments directly on the front panel to compensate for loop impedance offset and sensor drift.\u003c\/p\u003e\n\u003cp\u003eQ: How is operating power supplied to the CA0*A module?\u003c\/p\u003e\n\u003cp\u003eA: Operational power is supplied directly from the host system backplane bus upon inserting the card into the rack assembly.\u003c\/p\u003e\n\u003cp\u003eQ: Does the CA0*A module support hot-swapping during active DCS operation?\u003c\/p\u003e\n\u003cp\u003eA: Online replacement is supported provided standard anti-static procedures are maintained and the module retention latches are disengaged correctly before removal.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e Attach an anti-static wrist strap connected to cabinet frame ground before handling the circuit assembly to prevent static discharge damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Insertion:\u003c\/strong\u003e Align the printed circuit board edge with the sub-rack card guides and slide the module smoothly until the backplane edge connector fully seats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration Verification:\u003c\/strong\u003e Use a precision current calibrator across test terminals to verify Zero and Span settings after completing physical installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding:\u003c\/strong\u003e Ensure overall cable drain shields are landed onto a single instrument earth bar to prevent circulating ground currents across field loops.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":53312620757301,"sku":"CA0*A","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/CA0A.png?v=1786946330","url":"https:\/\/www.5gplc.com\/products\/ca0-a-interface-module-yokogawa","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}