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The 3500/61-01-00 is a high-performance 6-channel temperature monitoring module part of the Bently Nevada 3500 Machinery Protection System. This specific model is distinguished from the standard /60 series by its integrated 4-20mA recorder outputs for every channel. It is designed to provide continuous thermal surveillance of critical machinery components, such as radial and thrust bearing metal, stator windings, and lube oil temperatures, while simultaneously providing real-time data to external DCS or PLC systems.
| Specification | Details |
|---|---|
| Channel Capacity | 6 independent temperature monitoring channels |
| I/O Module Type (-01) | RTD/TC Non-isolated I/O Module with Internal Terminations |
| Recorder Outputs | 6 dedicated +4 to +20 mA DC proportional outputs (one per channel) |
| Sensor Compatibility | * RTDs: 100Ω Platinum (alpha 0.00385/0.00392), 120Ω Nickel, and 10Ω Copper * Thermocouples: Type E, J, K, T, and S |
| Wiring Interface | Onboard compression screw terminals (no external terminal block required) |
| Dimensions | 241.3 mm x 24.4 mm x 241.8 mm |
| Net Weight | 0.91 kg |
| Environmental Rating | -30°C to +65°C |
The 3500/61-01-00 version features Internal Terminations, meaning field wiring connects directly to the rear of the rack. This configuration is highly efficient for standard control room environments where additional safety barriers are not required. The integrated recorder outputs allow plant operators to trend temperature data on secondary displays without needing a separate communication gateway, providing a redundant layer of data visibility.
Q: How does the 3500/61 handle a "Sensor OK" fault?
A: The module continuously monitors the integrity of the sensor circuit. If a wire breaks or shorts, the "NOT OK" status is triggered, which can be programmed to inhibit alarms and prevent false machinery trips.