Description
Bently Nevada 133811-02 3500/61 Temperature Monitor Module
The Bently Nevada 133811-02 serves as the primary 133811-02 3500/61 Temperature Monitor Module utilized to execute high-accuracy temperature signal monitoring across Bently Nevada 3500 Machinery Protection System platforms.
Suffix Breakdown & Model Matrix
The 133811-02 is supplied as a single fixed-configuration module. No additional suffixes or alternative model matrices are specified in the provided documentation. The module supports six independent temperature input channels and integrates with 3500 Series rack systems for signal processing and alarm output.
Hardware Specifications
| Parameter |
Specification |
| Model |
133811-02 |
| Brand |
Bently Nevada |
| Origin |
USA |
| Weight |
0.91 kg |
| Dimensions |
241.3 × 24.4 × 241.8 mm |
| Operating Temp |
−30 deg C to +65 deg C |
| Storage Temp |
−40 deg C to +85 deg C |
| Power Consumption |
~5.8 W |
| Input Channels |
6 temperature channels |
| Supported Sensors |
RTDs (2/3/4-wire), Thermocouples (Type J, K, T, E), Thermistors |
| Measurement Range |
Sensor-dependent (e.g., −200 deg C to +850 deg C for thermocouples) |
| Accuracy |
±3 deg C at 25 deg C typical, ±0.1% FS |
| Resolution |
16-bit A/D |
| Analog Outputs |
2 outputs, 4–20 mA |
| Alarm Functions |
Independent Alert and Danger thresholds per channel |
| Relay Output |
Via 3500 rack relay modules |
| Certifications |
CE, CSA, ATEX, IECEx |
Rotor Thermal & Signal Integrity Features
The module incorporates cross-channel signal isolation to prevent interference between analog temperature inputs. Thermocouple inputs include cold junction compensation (CJC) to maintain accuracy over the operating range. Input scaling is performed internally to ensure consistent readings across 2/3/4-wire RTDs and multiple thermocouple types. The module design mitigates electromagnetic interference from adjacent machinery and rack components, maintaining integrity of real-time monitoring data critical to predictive maintenance.
Frequently Asked Questions (FAQ)
Q: Can the 133811-02 module be hot-swapped without disrupting the rack?
A: Yes. The module supports hot-swap replacement, allowing maintenance without powering down the 3500 Series rack.
Q: How are temperature inputs isolated from each other?
A: Each input channel is galvanically isolated, reducing cross-talk and preventing interference between sensors.
Q: What is the recommended ambient environment for accurate operation?
A: Operate within −30 deg C to +65 deg C, with humidity up to 95% non-condensing. Avoid direct exposure to water ingress or strong EMI sources beyond standard industrial control environments.
Field Installation Guidelines
-
Install modules in 3500 Series racks according to rack orientation and slot numbering.
-
Ensure proper backplane engagement; listen for tactile click confirming seating.
-
Route sensor cables to minimize exposure to high-voltage lines or switching noise.
-
Maintain grounding and shield continuity on thermocouple or RTD cabling for optimal signal fidelity.
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Avoid mechanical shock or bending stress on input cables; secure wiring with cable ties or trays.
