Bently Nevada 3500/61 TEMPERATURE MONITOR PWA190085 L02

Product Parameters

• Model Number: 3500/61
• PWA Part Number: 190085-02 (Revision L02)
• Channel Count: 6-channel monitor
• Input Signal Types: RTD (Resistance Temperature Detector) and TC (Thermocouple)
• Isolation: 500 Vrms (Channel-to-channel and channel-to-rack)
• Communication Protocol: Proprietary Bently Nevada rack interface
• Power Consumption: 7 watts (Maximum)
• A/D Conversion: 24-bit Sigma-Delta

Product Description The Bently Nevada 3500/61 190085-02 is a high-precision, 6-channel temperature monitoring module designed for the 3500 Series Machinery Protection System. It provides continuous, real-time temperature monitoring by processing inputs from both Thermocouple and RTD sensors. The L02 revision of this Printed Wiring Assembly (PWA) is engineered for enhanced stability and signal filtering, ensuring accurate readings even in high-EMI industrial environments. The module compares measured temperatures against user-defined alarm setpoints, triggering protective relays within the rack to safeguard critical rotating machinery from overheating and thermal stress.

Application Areas This temperature monitor is primarily used in power generation, oil and gas, and chemical processing plants. It is specifically designed to monitor bearing temperatures, winding temperatures in large motors and generators, and process temperatures in steam and gas turbines where precise thermal oversight is mandatory for machine longevity.

Product Specifications

• Weight: 0.82 kg
• Dimensions: 241 mm x 24.4 mm x 103 mm
• Country of Origin: USA
• Operating Temperature: -30°C to +65°C (-22°F to +149°F)

Operational Precautions

• Verify that the jumper settings on the board or software configurations match the specific sensor type (RTD or TC) being used to prevent scaling errors.
• Use shielded, twisted-pair wiring for all sensor connections to minimize noise interference on the low-voltage temperature signals.
• Ensure the module is fully inserted and the thumbscrews are hand-tightened to maintain consistent ground contact with the 3500 rack backplane.
• When replacing a module, confirm that the configuration is downloaded from the 3500 Rack Configuration Software to ensure alarm setpoints remain consistent with plant safety standards.

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