{"product_id":"bently-nevada-285694-02-3500-61e-6-channel-temperature-monitor","title":"Bently Nevada 285694-02 3500\/61E 6-Channel Temperature Monitor","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e285694-02 (3500\/61E)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-precision, six-channel temperature monitoring module designed for the Bently Nevada 3500 ENCORE machinery protection system. Primarily utilized in heavy-duty gas turbines, steam turbines, and large-scale compressors within the power generation and oil and gas sectors, this module provides critical protection for motor windings and bearing temperatures. By continuously processing Resistance Temperature Detector (RTD) signals and comparing them against user-programmable Alert and Danger setpoints, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e285694-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eensures that thermal excursions are detected before catastrophic mechanical failure occurs. Its ability to integrate into both legacy 3300 rack upgrades and modern ENCORE system racks makes it a versatile solution for reducing plant downtime and extending the lifecycle of rotating assets.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e285694-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis configured as a non-isolated RTD monitor, optimized for high-density thermal sensing where 3-wire or 4-wire platinum sensors are standard.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSensor Versatility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSupports 100 Ohm Platinum (alpha = 0.00385 or 0.00392), 120 Ohm Nickel, and 10 Ohm Copper RTDs. Platinum RTD (0.00385) is the recommended worldwide industrial standard for highest accuracy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSystem Adaptability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIn \"Rack Upgrade\" mode, it interfaces with existing 3300 series I\/O modules and relays. In \"ENCORE System\" mode, it utilizes logic-programmable Relay Modules for alarm driving.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSignal Integrity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProvides a dedicated 913 microampere current source per transducer (single supply for 4-wire, dual for 3-wire) to ensure stable resistance measurement over long cable runs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperational Visibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEquipped with front-panel LEDs for OK, Alert, Danger, and Bypass status, providing immediate local diagnostic feedback to maintenance personnel.\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 class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\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\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e285694-02 (3500\/61E)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\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\u003eInput Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6-Channel RTD (Resistance Temperature Detector)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRTD Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100 Ohm Platinum, 120 Ohm Nickel, 10 Ohm Copper\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5.6 watts nominal (RTD Option)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRecorder Output\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 to 20 mA (Individual for each channel)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 deg C or 1 deg F\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAccuracy (Platinum)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e+\/- 1 deg C max (range limited to 150 deg C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20 deg C to +65 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGreater than 3 MOhm for each lead\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eVoltage Compliance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to +12 VDC range across load (0 to 600 Ohm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 3500\/61E handle \"Rack Upgrade\" vs. \"Full System\" installations?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn a Rack Upgrade, the 3500\/61E replaces the 3300\/30 or 3300\/35 monitor while using the original 3300 I\/O and relays. In a full ENCORE System, it uses new ENCORE Temperature I\/O modules and a programmable relay module to drive alarms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs field calibration required for this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. All configuration parameters are set via the 3500 Rack Configuration Software. The module's high-precision internal circuitry eliminates the need for manual field calibration once the transducer type and range are defined.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the impact of a short circuit on the recorder outputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe monitor operation is completely unaffected by short circuits on the 4 to 20 mA recorder outputs. This design ensures that a fault in the DCS\/PLC signal line will not compromise the primary machinery protection logic.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eInstallation Guidelines and Field Engineering Advice\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRTD Wiring Precision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFor 3-wire RTD installations, ensure all three leads have nearly identical resistance and are routed together. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e285694-02\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003euses two current sources for 3-wire compensation; significant lead resistance imbalance will introduce temperature measurement errors that could lead to false trips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBarrier Considerations:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhen using external intrinsic safety barriers, note that the lower \"OK\" limit of the sensor is typically restricted to -50 deg C. Ensure the 3500 Configuration Software is adjusted to account for the added resistance of the barriers to maintain measurement accuracy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRelay Logic Management:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIn an ENCORE System configuration, remember that the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3500\/61E\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edoes not have onboard relays. It must be mapped to a 3500 Relay Module. Verify that the \"Bypass\" status of the monitor is correctly reflected in the plant's safety interlocking logic during maintenance to prevent blind operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShielding Best Practices:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTo minimize electromagnetic interference (EMI) on low-level RTD signals, use shielded twisted-pair cabling. Terminate shields only at the 3500 rack ground bus to avoid ground loops that can cause signal \"drifting\" or erratic Alert\/Danger triggers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666516668779,"sku":"3500\/61E 285694-02","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-3500-61e-285694-02-temperature-monitor-f3g3ccfvs2b_d717d800-41d8-4ef7-ba75-cc9da7657211.jpg?v=1765440094","url":"https:\/\/www.plcprotech.com\/products\/bently-nevada-285694-02-3500-61e-6-channel-temperature-monitor","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}