{"product_id":"bently-nevada-3500-42m-135489-02-proximitor-seismic-i-o-module","title":"Bently Nevada 3500\/42M 135489-02 Proximitor Seismic I\/O Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"citation-144\"\u003eThe Bently Nevada\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e135489-02\u003c\/strong\u003e\u003cspan class=\"citation-144\"\u003e\u003cspan\u003e \u003c\/span\u003eis a specialized 4-channel Proximitor Seismic I\/O Module with\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003eInternal Intrinsic Safety Barriers\u003c\/strong\u003e\u003cspan class=\"citation-144 citation-end-144\"\u003e\u003cspan\u003e \u003c\/span\u003eand Internal Terminations designed for the 3500 Series Machinery Protection System.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eSeated in the rear slot of the 3500 instrumentation rack, this module serves as the direct hardware interface linking field-mounted sensors to the front-facing 3500\/42M Proximitor Seismic Monitor module.\u003c\/p\u003e\n\u003cp\u003eThe hardware architecture provides two dedicated proximity\/acceleration channels and two specialized Velomitor channels.\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"citation-143 citation-end-143\"\u003eEquipped with integrated Zener-type internal barriers, the 135489-02 restricts electrical fault energy traveling from the rack into the field, providing explosion-proof protection for transducers deployed in Class I, Division 1 or Zone 0 hazardous environments without the need for external galvanic isolation panels.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3500\/42M (Rear Barrier Variant)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePart Number \/ ID\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e135489-02\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eProximitor Seismic I\/O Module with Internal Barriers\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSystem Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3500 Series Machinery Protection System\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eChannel Layout\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 Proximity\/Acceleration + 2 Velomitor channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSafety Integration\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBuilt-in Intrinsic Safety Barriers (Internal Zener Barriers)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTermination\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIntegrated Multi-position Screw Terminal Blocks\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSupported Transducers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3300 XL Proximity Probes, Accelerometers, Velomitors\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConditioned Values\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRadial Vibration, Thrust, Eccentricity, Velocity, Acceleration\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Net Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.201 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUnited States (USA)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cp\u003eMachinery verification networks operating in hazardous processing environments require exact tracking of rear I\/O card variation codes. Procure components matching the factory keys below.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMain System Core Monitor Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3500\/42M\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFactory Order Part Number:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e135489-02\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAssociated Front Module Counterpart:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3500\/42M Proximitor Seismic Processor Card\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering Notes \u0026amp; Field Wiring Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHazardous Area Wiring and Barrier Safety\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-142 citation-end-142\"\u003eThe 135489-02 card houses integrated explosion protection circuitry.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eField wiring routing out from the module's terminal block must follow strict intrinsic safety segregation guidelines.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eClearance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eKeep all intrinsically safe field transducer cables physically separated from non-intrinsically safe wires by a minimum clearance boundary of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e50 mm (2.0 inches)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDividers:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAlternatively, install dedicated grounded metal dividers to avoid voltage arc induction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFixed Screw Terminal Allocation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eField cabling maps directly onto the built-in internal termination blocks. Use high-quality 3-wire twisted-shielded instrumentation cables (18 AWG to 22 AWG copper) to carry low-voltage displacement and acceleration paths.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePreparation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eStrip individual conductor insulation jackets back exactly 7 mm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGrounding:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eConnect outer grounding shields together and anchor them to the clean instrumentation earth rail at the structural cabinet bulkhead.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDo not\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eloop shield drain wires through the proximity signal common (COM) screws.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConfiguration Handshake and Safety Restrictions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBecause the 135489-02 limits terminal fault currents through precision internal barriers, plugging non-designated transducer loads into the channel pins can overload the internal Zener elements, destroying the protection loop. Prior to activating sensor excitation power, match the channel selection parameters (e.g., standard proximity probe versus Velomitor configuration) within the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500 Rack Configuration Software\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto align with specific paired-channel hardware attributes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eMaintenance \u0026amp; Troubleshooting FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary difference between the 135489-02 and standard 3500\/42M I\/O modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-141 citation-end-141\"\u003eA: The 135489-02 features built-in internal safety barriers.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eStandard I\/O versions do not contain intrinsic insulation paths, requiring plants to source and mount independent, external barrier boards when routing sensor leads into classified hazardous plant fields.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the channel structure split into two distinct sensor pairs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The hardware layout dictates specialized input electronics. Channels 1 and 2 are balanced to process voltage variables from high-frequency proximity probes or accelerometers, while Channels 3 and 4 feature targeted current loops designed specifically for active Velomitor-type velocity sensors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I hot-swap this rear I\/O module while the 3500 rack is running?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: While the front-facing 3500\/42M card allows hot-swapping, extracting the rear 135489-02 while powered up breaks the physical sensor feedback loop and cuts excitation paths. This immediately triggers system interlocks and trips connected safety relays. Always change the rack security keyswitch to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e\"PROGRAM\"\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emode and establish channel bypass blocks before initiating hardware service.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666869612907,"sku":"135489-02","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-135489-02-i-o-module-with-internal-barriers-and-internal-terminations-cfy5l5nmfwu_80b4d093-609f-4e33-a266-6b0411b744dd.jpg?v=1765449578","url":"https:\/\/www.plcprotech.com\/products\/bently-nevada-3500-42m-135489-02-proximitor-seismic-i-o-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}