{"product_id":"bently-nevada-77581-02-external-termination-block","title":"Bently Nevada 77581-02 External Termination Block","description":"\u003cp\u003e\u003cspan\u003eShopify Product Title:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBently Nevada 77581-02 | External Termination Block (ETB) | Compatible with 3500\/42M, 3500\/40M, 3500\/45 | DIN-Rail Mount\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003eBently Nevada 77581-02\u003c\/span\u003e is a \u003cspan\u003ehigh-precision External Termination Block (ETB)\u003c\/span\u003e designed for use with the \u003cspan\u003e3500\/42M Proximitor Seismic Monitor\u003c\/span\u003e and other modules within the \u003cspan\u003e3500 Series Machinery Protection System\u003c\/span\u003e. This essential component provides a clean, organized interface between field-mounted sensors (such as \u003cspan\u003eproximity probes\u003c\/span\u003e, \u003cspan\u003eaccelerometers\u003c\/span\u003e, or \u003cspan\u003evelocity sensors\u003c\/span\u003e) and the internal monitoring electronics of the \u003cspan\u003e3500 rack\u003c\/span\u003e. By shifting the wiring landing points from the back of the rack to a separate, easily accessible \u003cspan\u003eDIN-rail mounted block\u003c\/span\u003e, it simplifies \u003cspan\u003ecable management\u003c\/span\u003e and \u003cspan\u003emaintenance\u003c\/span\u003e in high-density installations.\u003c\/p\u003e\n\u003cp\u003eThe \u003cspan\u003e77581-02\u003c\/span\u003e is typically the \u003cspan\u003enon-intrinsically safe (standard)\u003c\/span\u003e version and supports configurations for \u003cspan\u003e2-wire\u003c\/span\u003e or \u003cspan\u003e3-wire\u003c\/span\u003e transducers, ensuring a flexible solution for a variety of sensor types.\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eKey Technical Specifications\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePart Number:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e77581-02\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible Monitors:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBently Nevada 3500\/42M\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBently Nevada 3500\/40M\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBently Nevada 3500\/45\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMounting Type:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eStandard \u003cspan\u003e35 mm DIN-rail\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eI\/O Capacity:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eSupports \u003cspan\u003e4 channels\u003c\/span\u003e per block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWiring Connection:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompression-style screw terminals\u003c\/span\u003e (for \u003cspan\u003e12 to 22 AWG\u003c\/span\u003e wire)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCable Interface:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e25-pin D-sub\u003c\/span\u003e (connects to the 3500 I\/O module)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMaterial:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eImpact-resistant Polyamide (PA)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOperating Temperature Range:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e-30°C to +70°C\u003c\/span\u003e (-22°F to +158°F)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eImproved Accessibility:\u003c\/span\u003e\u003cbr\u003eWith the \u003cspan\u003e77581-02\u003c\/span\u003e, technicians can perform \u003cspan\u003eloop checks\u003c\/span\u003e and troubleshoot sensor wiring \u003cspan\u003ewithout reaching into the cramped back-space\u003c\/span\u003e of a 19-inch instrument rack. This facilitates faster diagnostics and maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eShield Tie-Points:\u003c\/span\u003e\u003cbr\u003eThe block includes \u003cspan\u003ededicated terminals for cable shields\u003c\/span\u003e, which are essential for minimizing \u003cspan\u003eelectrical noise\u003c\/span\u003e in high-frequency vibration signals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFused Protection:\u003c\/span\u003e\u003cbr\u003eOften incorporates \u003cspan\u003einternal fuses\u003c\/span\u003e or \u003cspan\u003ecurrent-limiting components\u003c\/span\u003e to protect the \u003cspan\u003e3500 rack\u003c\/span\u003e from potential \u003cspan\u003efield-side electrical surges\u003c\/span\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eModular Design:\u003c\/span\u003e\u003cbr\u003eThe \u003cspan\u003e77581-02\u003c\/span\u003e can be grouped with additional \u003cspan\u003eETBs\u003c\/span\u003e for large-scale machinery installations. This modular setup is ideal for \u003cspan\u003emulti-slot racks\u003c\/span\u003e housing dozens of sensors in complex machinery protection systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan\u003eSystem Architecture\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eIn a typical \u003cspan\u003e3500 system\u003c\/span\u003e using external termination, the signal flow follows this path:\u003c\/p\u003e\n\u003col class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eField Sensor\u003c\/span\u003e (e.g., Proximitor, Accelerometer, etc.)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eField Wiring\u003c\/span\u003e (typically shielded twisted pair\/triad cables)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e77581-02 Termination Block\u003c\/span\u003e (where the field wires land)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInterface Cable\u003c\/span\u003e (multi-conductor cable with D-sub connectors)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e3500 I\/O Module\u003c\/span\u003e (installed at the rear of the 3500 rack)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThis configuration allows for efficient management of the signal path, ensuring optimal data transfer from the sensor to the \u003cspan\u003e3500 monitoring system\u003c\/span\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003e\u003cspan\u003eWhat is the purpose of the Bently Nevada 77581-02 ETB?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eThe \u003cspan\u003e77581-02\u003c\/span\u003e External Termination Block acts as the interface between \u003cspan\u003efield-mounted sensors\u003c\/span\u003e and the \u003cspan\u003e3500 rack\u003c\/span\u003e's internal monitoring electronics. It helps organize wiring and simplifies maintenance in high-density installations.\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eWhat types of sensors can be used with the 77581-02?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eThe \u003cspan\u003e77581-02\u003c\/span\u003e is designed to work with a variety of field-mounted sensors, including \u003cspan\u003eproximity probes\u003c\/span\u003e, \u003cspan\u003eaccelerometers\u003c\/span\u003e, and \u003cspan\u003evelocity sensors\u003c\/span\u003e, which are commonly used in \u003cspan\u003emachinery protection systems\u003c\/span\u003e.\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eHow many channels does the 77581-02 support?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eThe \u003cspan\u003e77581-02\u003c\/span\u003e supports up to \u003cspan\u003e4 channels per block\u003c\/span\u003e, making it suitable for managing multiple sensor inputs in machinery protection systems.\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eWhat kind of wiring connections does the 77581-02 use?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eThe \u003cspan\u003e77581-02\u003c\/span\u003e uses \u003cspan\u003ecompression-style screw terminals\u003c\/span\u003e that support wire gauges from \u003cspan\u003e12 AWG to 22 AWG\u003c\/span\u003e, providing flexibility for various field wiring configurations.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44096038895715,"sku":"77581-02","price":180.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/precisemodule.com\/products\/bently-nevada-77581-02-external-termination-block","provider":"Precise Module Ltd.","version":"1.0","type":"link"}