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The 3500/61 (Assembly Number 163179-02) is a high-performance 6-channel temperature monitoring module within the Bently Nevada 3500 Machinery Protection System. This module is specifically engineered to provide continuous thermal surveillance for critical assets, such as turbine bearings, motor stator windings, and compressor housings. It is unique for its integrated 4-20 mA recorder outputs, which allow real-time temperature data to be sent directly to external control systems (DCS/PLC) for trending and historical logging.
| Specification | Details |
|---|---|
| Channel Capacity | 6 independent, high-precision temperature channels |
| Input Versatility | User-configurable for RTDs, Thermocouples, or a mix of both |
| Signal Support |
RTDs: 100Ω Platinum (Pt100), 120Ω Nickel, and 10Ω Copper Thermocouples: Types J, K, E, T, and S |
| Recorder Outputs | 6 dedicated +4 to +20 mA DC proportional outputs (one per channel) |
| High Availability | Supports Triple Modular Redundancy (TMR) using dual-voting logic |
| Isolation Options | Supports isolated TC I/O modules for up to 250 Vdc channel-to-channel protection |
| Configuration | Programmed via the Bently Nevada 3500 Rack Configuration Software |
| Accuracy | ±1.5°C typical at room temperature |
| Net Weight | 0.73 kg |
The 163179-02 module enhances machinery reliability by providing early detection of thermal anomalies. Its TMR capability ensures that a single-point failure within the module hardware will not cause a false machine trip or a loss of protection. By utilizing the recorder outputs, plant engineers can perform advanced diagnostics and correlate temperature spikes with vibration or process data, leading to more informed maintenance decisions.
Q: Does the 163179-02 support grounded thermocouples?
A: While it can process various TC types, using grounded thermocouples is only recommended when paired with an Isolated TC I/O Module to prevent ground loop noise from affecting the 3500 system's accuracy.