{"product_id":"allen-bradley-1797-acnr15-flex-ex-controlnet-ex-redundant-media-adapter-module","title":"Allen-Bradley 1797-ACNR15 FLEX Ex ControlNet Ex Redundant Media Adapter Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1797-ACNR15\u003c\/strong\u003e is an intrinsically safe communications adapter designed for the \u003cstrong\u003eFLEX Ex\u003c\/strong\u003e distributed I\/O platform. This module forms the intelligent link between a central programmable automation controller and localized \u003cstrong\u003eFLEX Ex\u003c\/strong\u003e input\/output architectures operating within classified hazardous boundaries. It manages high-speed serial data exchanges and provides a structural interface that passes communication and power down the local backplane via an integrated FlexBus connection without compromising the system energy constraints.\u003c\/p\u003e\n\u003cp\u003eEquipped with dual coaxial ports, the device executes redundant media control routing to maintain consistent communication links even in the event of a physical trunk line failure. The \u003cstrong\u003e1797-ACNR15\u003c\/strong\u003e operates natively on \u003cstrong\u003eControlNet\u003c\/strong\u003e networks, converting standard communication payloads into low-energy signals rated for explosive gas, vapor, or dust environments. It is extensively installed in off-shore oil rigs, chemical processing areas, tank monitoring systems, and pharmaceutical batch plants requiring localized control nodes directly within hazardous zones.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDual ControlNet BNC ports providing native media redundancy for high-availability systems.\u003c\/li\u003e\n\u003cli\u003eIntrinsically safe circuitry enabling reliable operation directly within classified areas.\u003c\/li\u003e\n\u003cli\u003eBuilt-in galvanic isolation mechanisms separating field-side elements from main bus architectures.\u003c\/li\u003e\n\u003cli\u003eNode address configuration via accessible integrated front-panel switches.\u003c\/li\u003e\n\u003cli\u003eComprehensive diagnostic light-emitting diodes displaying active network statuses and fault codes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOffshore production platforms utilizing continuous safety shutdown networks.\u003c\/li\u003e\n\u003cli\u003eChemical refining facility zone-mounted remote I\/O concentration points.\u003c\/li\u003e\n\u003cli\u003ePetroleum storage tank farms requiring high-uptime telemetry aggregation.\u003c\/li\u003e\n\u003cli\u003eSpecialty grain processing silos with explosive atmospheric conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical 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\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFLEX Ex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1797-ACNR15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eControlNet Ex Redundant Media Adapter Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eControlNet V1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003eTwo (2) ControlNet Ex BNC tap drop connectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum I\/O Capacity\u003c\/td\u003e\n\u003ctd\u003e8 FLEX Ex modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Power Supply\u003c\/td\u003e\n\u003ctd\u003e9.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e8.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e8.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e29 BTU\/hour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Protection Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Size Capacity\u003c\/td\u003e\n\u003ctd\u003e3.31 mm2 (12 AWG) stranded maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20 to 70 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Vibration\u003c\/td\u003e\n\u003ctd\u003e2 g at 10 to 500 Hz per IEC 68-2-6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Shock\u003c\/td\u003e\n\u003ctd\u003e15 g peak acceleration, 11 ms pulse width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eSingapore \/ Germany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate Weight\u003c\/td\u003e\n\u003ctd\u003e0.60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate Dimensions\u003c\/td\u003e\n\u003ctd\u003e102 mm x 102 mm x 76 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eConnector \/ Switch Node\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControlNet Channel A BNC\u003c\/td\u003e\n\u003ctd\u003ePrimary ControlNet Ex network tap connection point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControlNet Channel B BNC\u003c\/td\u003e\n\u003ctd\u003eRedundant ControlNet Ex network tap connection point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemovable Power Terminals\u003c\/td\u003e\n\u003ctd\u003eIntake interface for intrinsically safe input power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNode Address Push Switches\u003c\/td\u003e\n\u003ctd\u003eHardware selector dials for adjusting local network identification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Connector\u003c\/td\u003e\n\u003ctd\u003eMale FlexBus interface routing power and data to adjacent bases\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003ch3\u003eDIN Rail Mounting\u003c\/h3\u003e\n\u003cp\u003eTilt the module at a slight angle and catch the rear mounting clip on the upper edge of a standard 35 mm x 7.5 mm DIN rail. Rotate the unit downward flush with the track until the integrated locking tab clicks into a fully engaged orientation.\u003c\/p\u003e\n\u003ch3\u003eGrounding Requirements\u003c\/h3\u003e\n\u003cp\u003eThis hardware is grounded directly through the structural DIN rail to a dedicated intrinsic safety earth ground. Always utilize zinc-plated yellow-chromate steel DIN rails. Do not use poor conductor paths like aluminum or plastic rails which can degrade or break the safety ground path.\u003c\/p\u003e\n\u003ch3\u003eCommunication Tap Connections\u003c\/h3\u003e\n\u003cp\u003eRemove the factory protective insulator boots from the BNC jacks before seating. Click the primary media drop line firmly into Channel A. Secure the backup cable to Channel B to achieve media redundancy. Torque terminal screw connections to 0.8 to 1 N-m (5 to 7 lb-in).\u003c\/p\u003e\n\u003ch3\u003ePower Constraints\u003c\/h3\u003e\n\u003cp\u003eEnsure this module is driven solely by an approved intrinsically safe external power supply block. Verify that voltage and current limits on the delivery side never exceed the specific technical boundary limits assigned to this unit.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat protocol does this communications component utilize?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt communicates across industrial networks using the specialized ControlNet version 1.5 specification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this hardware module provide automatic path switching if a wire breaks?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the dual BNC connection layout supports automatic control routing across the redundant line without stopping system logic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this unit be mounted directly inside a Zone 1 explosion-prone environment?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the device is engineered with intrinsic safety protections allowing deployment within classified locations when housed in an appropriate metal enclosure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum number of extension units this adapter can control?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module is capable of addressing and powering a maximum backplane stack of eight discrete FLEX Ex modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the network node identifier set on this assembly?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe node address is selected by manually clicking the integrated push switches found on the side or front of the housing enclosure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan a standard commercial power source be wired into this device?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, it must receive operational potential exclusively from an approved intrinsically safe power network supply line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat function do the color LED displays perform on the faceplate?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe light indicators provide real-time updates regarding communication line status, local module errors, and power rail parameters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it safe to configure or disconnect lines while the terminal remains powered?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDo not touch or disconnect field cabling unless the surrounding environment is verified to be non-hazardous or power has been totally isolated.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat specific type of coaxial network cabling is recommended?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is designed to connect to quad-shield RG-6\/U type coaxial media runs such as the factory 1786-RG6 cables.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this device feature conformal coating protections?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the module boards receive a factory conformal coating layer to insulate components against airborne corrosive elements.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695179231595,"sku":"1797-ACNR15","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1797-acnr15-flex-ex-i-o-modules-upakpucb1wv_1e0465aa-b246-4cc2-831f-c3169fa91923.jpg?v=1766114238","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1797-acnr15-flex-ex-controlnet-ex-redundant-media-adapter-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}