{"product_id":"communication-module-serial-interface-yokogawa-acm12-zct-acm12","title":"Communication Module Serial Interface | Yokogawa ACM12\/ZCT ACM12","description":"\u003ch2\u003eYokogawa ACM12 CENTUM Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa ACM12\/ZCT\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eACM12\u003c\/strong\u003e Communication Module, operates as a dedicated hardware component for serial communication within Yokogawa CENTUM platforms.\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\u003eSuffix Code\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eOption\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eACM12\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003eRS-422\/RS-485 serial communication module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\/ZCT\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDedicated Interface\u003c\/td\u003e\n\u003ctd\u003eCustom terminal\/cable interface variant\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\u003eACM12\/ZCT\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\u003e0.8–1.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e130 mm x 35 mm x 128 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.0–2.5 A at 5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Ports\u003c\/td\u003e\n\u003ctd\u003e1 RS-422\/RS-485 port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocols\u003c\/td\u003e\n\u003ctd\u003eRS-422 (full-duplex), RS-485 (half-duplex)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rates Supported\u003c\/td\u003e\n\u003ctd\u003e1200 \/ 2400 \/ 4800 \/ 9600 \/ 19200 \/ 38400 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Code\u003c\/td\u003e\n\u003ctd\u003eASCII \/ Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Framing\u003c\/td\u003e\n\u003ctd\u003eCharacter length: 7 or 8 bits; Stop bit length: 1 or 2 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParity Options\u003c\/td\u003e\n\u003ctd\u003eNone \/ Even \/ Odd\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Transmission Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 1200 m (total cable length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Connection\u003c\/td\u003e\n\u003ctd\u003e6-pole terminal with M4 screw connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eYokogawa CENTUM CS \/ CENTUM VP systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSerial Data Execution and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe ACM12\/ZCT module executes point-to-point and multipoint differential serial data exchange across distributed process loops. Differential signaling suppresses common-mode noise across long-distance cable runs up to 1200 meters. The module transfers field data into the host DCS system backplane using start-stop bit framing and configurable parity checks. Galvanic isolation across the serial interface protects internal system logic from external field surge transients and ground potential variations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How should line termination resistors be applied across an RS-485 multipoint bus connected to the module?\u003c\/p\u003e\n\u003cp\u003eA: Install a 120 ohm matching termination resistor across the differential signal line pair (+ and -) at both physical ends of the RS-485 trunk cable. Terminating intermediate nodes causes excessive bus loading and degrades signal amplitude.\u003c\/p\u003e\n\u003cp\u003eQ: Can the module be inserted into an active communication slot under power?\u003c\/p\u003e\n\u003cp\u003eA: Always isolate power to the rack or follow station-specific hot-swap safety protocols before removing or inserting the module. Uncontrolled insertion into a live backplane may cause transmission errors or initiate a transient reset on the serial bus.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the module into its designated communication slot within the system rack. Secure all physical chassis fasteners to maintain mechanical grounding and prevent connection fatigue from panel vibration.\u003c\/p\u003e\n\u003cp\u003eUtilize shielded twisted-pair cables for all RS-422\/RS-485 field runs. Connect signal drain wires to the designated M3\/M4 shield ground terminal at a single cabinet point to prevent circulating ground loops. Maintain separation between serial communication lines and high-voltage AC power wiring inside the enclosure channels.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43823044329562,"sku":"ACM12\/ZCT","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/784..jpg?v=1786411470","url":"https:\/\/www.spareoil.com\/products\/communication-module-serial-interface-yokogawa-acm12-zct-acm12","provider":"SpareOil Automation","version":"1.0","type":"link"}