{"product_id":"bently-nevada-87890-01-monitor-circuit-assembly-for-3300-03-system-monitor","title":"Bently Nevada 87890-01 Monitor Circuit Assembly for 3300\/03 System Monitor","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 87890-01\u003c\/strong\u003e is a Monitor Circuit Assembly used in the \u003cstrong\u003e3300\/03 System Monitor\u003c\/strong\u003e for Bently Nevada 3300 machinery monitoring racks.\u003c\/p\u003e\n\u003cp\u003eThe assembly forms part of the System Monitor electronics responsible for rack-level monitoring and control functions. The 3300\/03 architecture provides System Reset, Inhibit, OK, Trip Multiply, and Keyphasor-related functions within the 3300 monitoring system.\u003c\/p\u003e\n\u003cp\u003eThe System Monitor also coordinates the rack OK logic. Individual monitor OK relay drives feed the rack OK bus, while the System Monitor and Power Input Module determine the final OK relay state.\u003c\/p\u003e\n\u003cp\u003eWhen replacing an 87890-01 assembly, the complete 3300\/03 catalog configuration and any modification information should be identified before installation. Programmable options must match the original System Monitor configuration.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMonitor Circuit Assembly for the Bently Nevada 3300\/03 System Monitor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePart number 87890-01\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUsed within the 3300 machinery monitoring system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports rack-level System Monitor functions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAssociated with System Reset and Inhibit functions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInterfaces with rack OK relay logic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports Trip Multiply control functions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAssociated with Keyphasor signal handling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProgrammable according to the installed 3300\/03 configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplacement configuration should match the original catalog and modification data\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMaintenance of Bently Nevada 3300 monitoring racks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRepair of 3300\/03 System Monitor assemblies\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRack-level machinery protection system servicing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplacement of an existing 87890-01 circuit assembly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRestoration of System Monitor control and supervisory functions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e87890-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eMonitor Circuit Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssociated Module\u003c\/td\u003e\n\u003ctd\u003e3300\/03 System Monitor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem\u003c\/td\u003e\n\u003ctd\u003eBently Nevada 3300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgrammable -VT Option\u003c\/td\u003e\n\u003ctd\u003e-18 Vdc or -24 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to +65 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\u003e0 to 95%, noncondensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSystem Functions\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Reset\u003c\/td\u003e\n\u003ctd\u003eRack-level reset contact function\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Inhibit\u003c\/td\u003e\n\u003ctd\u003eProvides rack inhibit control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOK Bus\u003c\/td\u003e\n\u003ctd\u003eReceives OK relay drive status from installed monitors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Multiply\u003c\/td\u003e\n\u003ctd\u003eSupports external Trip Multiply contact functions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKeyphasor\u003c\/td\u003e\n\u003ctd\u003eProvides Keyphasor-related signal and power functions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Power-Up Inhibit\u003c\/td\u003e\n\u003ctd\u003eIncludes power-up inhibit timing within the System Monitor architecture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eElectrical References\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e+VRH\u003c\/td\u003e\n\u003ctd\u003e23.65 +\/- 6.35 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e+VRL\u003c\/td\u003e\n\u003ctd\u003e11.22 +\/- 3.09 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e+7.5 V\u003c\/td\u003e\n\u003ctd\u003e7.5 +\/- 0.1 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e+5 V\u003c\/td\u003e\n\u003ctd\u003e5.00 +\/- 0.05 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eREF\u003c\/td\u003e\n\u003ctd\u003e5.00 +\/- 0.009 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e-7.5 V\u003c\/td\u003e\n\u003ctd\u003e-7.5 +\/- 0.1 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e-VT, -24 V Option\u003c\/td\u003e\n\u003ctd\u003e-23.75 +\/- 0.45 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e-VT, -18 V Option\u003c\/td\u003e\n\u003ctd\u003e-17.9 +\/- 0.4 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Power-Up Inhibit Delay\u003c\/td\u003e\n\u003ctd\u003e2.1 +\/- 1 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKeyphasor Output\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e-24 V Option\u003c\/td\u003e\n\u003ctd\u003e-23.2 to -24.2 V, short-circuit protected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e-18 V Option\u003c\/td\u003e\n\u003ctd\u003e-17.4 to -18.3 V, short-circuit protected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation \u0026amp; Commissioning\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eVerify the replacement part number \u003cstrong\u003e87890-01\u003c\/strong\u003e before installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRecord the complete 3300\/03 catalog number and modification number before removing the original assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMatch all programmable options to the existing System Monitor configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConfirm that the System Monitor and Power Supply use the same -VT setting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInspect rack connectors and mating interfaces before installing the circuit assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApply power and verify that the System Monitor reaches normal operation after the power-up inhibit period.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCheck rack OK logic and Keyphasor functions before returning the monitoring system to service.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReplacement Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e87890-01 is the Monitor Circuit Assembly, not the complete 3300\/03 System Monitor.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe Front Panel Assembly is listed separately in the Bently Nevada spare-parts structure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplacement orders should identify the complete 3300\/03 catalog number together with 87890-01.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eModified monitors should also be identified by their modification number.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":53754751123819,"sku":"87890-01","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/87890-01-3300-03_003_1200x1200_213c3ee7-6044-4791-9216-813f14e9dc3e.png?v=1787393550","url":"https:\/\/www.plcprotech.com\/products\/bently-nevada-87890-01-monitor-circuit-assembly-for-3300-03-system-monitor","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}