Description
Bently Nevada 3300/35 Six-Channel RTD Temperature Monitor
Configured for multi-channel RTD temperature acquisition and alarm threshold processing in 3300 Series machinery protection architecture, the Bently Nevada 3300/35 Six-Channel RTD Temperature Monitor (3300/35 Temperature Monitor) provides direct physical/electrical execution.
Hardware Specifications
| Parameter |
Specification |
| ModelBrand |
Bently Nevada 3300/35 |
| OperatingTemp |
0 degC to 65 degC |
| Channels |
6 independent RTD input channels |
| Sensor Types |
Pt100 (alpha 0.00385 / 0.00392), Ni120, Cu10 |
| Output Types |
4-20 mA, 1-5 VDC, 0 to -10 VDC |
| Accuracy |
+/-1.8 percent of reading, +/-0.09 mA offset at 25 degC |
| Alarm System |
Dual setpoints per channel (Alert, Danger) |
Bently Nevada TSI Signal Integrity and Cross-Talk Suppression Behavior
The module implements RTD excitation and resistance measurement conditioning with channel isolation intended to reduce measurement coupling between adjacent inputs. Internal signal processing supports stable conversion of resistance variation into calibrated temperature scaling across Pt and Cu RTD curves. In TSI chain integration, the input stage is designed to maintain low-noise acquisition characteristics under long field wiring runs, limiting cross-channel interference during simultaneous sampling. Alarm logic execution is handled locally per channel, reducing dependency on external processing loops and ensuring deterministic threshold evaluation for each RTD loop.
Frequently Asked Questions
Q: Can the 3300/35 be hot-swapped during operation?
A: The module is designed for rack-based installation. Hot-swap capability depends on system backplane configuration and is not inherently guaranteed at module level.
Q: Does each channel support independent scaling ranges?
A: Yes. Each RTD channel supports individually configurable temperature scaling within the defined sensor curve limits.
Q: What happens if an RTD wiring fault occurs?
A: The OK circuit detects open or short conditions and flags a channel fault status to prevent invalid temperature interpretation.
Field Installation Guidelines
Install the module into the compatible 3300 series rack ensuring full backplane seating to maintain signal integrity across all RTD channels. Use twisted shielded cable for RTD inputs and terminate shield grounding at a single point to avoid ground loops. Maintain separation between RTD wiring and high-voltage conductors to reduce induced noise. Verify correct RTD type selection (Pt, Ni, Cu) prior to system power-up, as incorrect configuration affects measurement linearization. Ensure relay module seating is secure if alarm outputs are used in safety interlock loops.
