{"product_id":"yokogawa-acm71-ethernet-communication-module","title":"Yokogawa ACM71 Ethernet Communication Module","description":"\u003cp\u003eConfigured for high-speed data gateway linking and network bridging in distributed control systems, the \u003cstrong\u003eYokogawa ACM71\u003c\/strong\u003e (\u003cstrong\u003eACM71\u003c\/strong\u003e Ethernet Communication Module) provides direct physical execution of real-time data transmission across field control station platforms.\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\u003eACM71\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\u003e0.3 kg (0.66 lbs) nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard plug-in form factor for Yokogawa communication nests\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C (standard cabinet baseline)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.2 A or less (at 5.0 V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Standard\u003c\/td\u003e\n\u003ctd\u003eIEEE 802.3, 10BASE-T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhysical Interface\u003c\/td\u003e\n\u003ctd\u003eRJ45 Connector port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003e10 Mbps fixed throughput\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Line Segment Length\u003c\/td\u003e\n\u003ctd\u003e100 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCabling Constraint\u003c\/td\u003e\n\u003ctd\u003e100 V Unshielded Twisted-Pair (UTP) cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Process Control and Networks\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-20 mA HART Loop Protocol Integration:\u003c\/strong\u003e The communication module functions as an upper-layer transmission bridge, routing digital telemetry from field instruments up to supervisory Ethernet networks. This framework handles the parallel extraction of secondary variable data from localized 4-20 mA HART loops, enabling diagnostic access without altering basic process variables.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel-to-Channel Isolation Protection:\u003c\/strong\u003e Internal electrical paths feature robust galvanic barriers that isolate the field-side network signals from the central processing backplane logic. This structural channel-to-channel isolation prevents electrical ground loops, inductive spikes, or high-voltage faults on the 10BASE-T line from damaging adjacent controller logic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold Junction Compensation Coordination:\u003c\/strong\u003e When the module moves data from temperature-sensing sub-nests, the internal serial-to-Ethernet translation maps process information alongside localized cold junction compensation (CJC) factors. This maintains overall loop precision when thermocouple inputs are routed across the factory network.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What specific hardware states are indicated by the physical SND, RCV, and RDY LED matrix during runtime operation?\u003c\/p\u003e\n\u003cp\u003eA: The SND (Send) and RCV (Receive) LEDs flash dynamically to verify active packet transfer across the 10 Mbps media layer. The RDY (Ready) LED remains solidly illuminated to confirm the module has passed its internal power-on self-test (POST) and is successfully receiving its 5.0 V DC logic supply from the nest backplane.\u003c\/p\u003e\n\u003cp\u003eQ: What are the engineering consequences if an unshielded twisted-pair (UTP) segment exceeds the defined 100-meter physical boundary?\u003c\/p\u003e\n\u003cp\u003eA: Exceeding the 100-meter limit causes attenuation of the 10BASE-T signal and increases the likelihood of frame collisions. Because the module does not use internal signal amplifiers for extended loops, distances beyond 100 meters require an active external network hub or switch to prevent packet truncation and data loss.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":47616602734782,"sku":"ACM71","price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-05-14_09-48-24_2dfa89eb-05e4-4b04-8c20-6d1a5f6edbcb.png?v=1780998939","url":"https:\/\/www.autooiltech.com\/products\/yokogawa-acm71-ethernet-communication-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}