Description
The Bently Nevada 86517-01-01-01-02 is a high-precision, rack/plate-mounted analog signal conditioning module engineered for aeroderivative gas turbines and heavy industrial turbomachinery. It interfaces charge-mode or low-impedance acceleration transducers directly with external machinery protection systems, such as the Bently Nevada 3300/95 Filter Module or 3500 series vibration monitoring racks. By conditioning raw acceleration signals into filtered dynamic and proportional DC metrics, it enables precise predictive maintenance analytics in highly volatile environments.
Part Number Configuration Breakdowns
The exact model string 86517-01-01-01-02 corresponds to the following factory configuration metrics:
- 86517: Core Accelerometer Interface Module Platform
- -01 (Transducer Charge Input Sensitivity): Calibrated for 50 pC/g input signals
- -01 (Filter Corner Frequency): High-pass corner frequency at 25 Hz; low-pass corner frequency at 350 Hz
- -01 (DC Signal Bias Voltage): -10 V DC nominal bias configuration
- -02 (Agency Approval Options): North American / European certification envelope (CSA/NRTL/C and ATEX standard configurations; verify exact zone/division limitations against individual module labels).
Technical Specifications
| Parameter | Value / Detail |
| Model Number | 86517-01-01-01-02 |
| Input Channels | Single-channel charge-amplified accelerometer input |
| Operating Input Voltage | −24 V DC nominal power rail requirements |
| System Precision | \pm 0.5\% of Full Scale (F.S.) |
| Output Signatures | Proportional dynamic vibration signal and structured 4-20 mA DC loop |
| Enclosure/Base Design | Sealed architecture suitable for outdoor terminal enclosures |
| Operating Temperature | −40 to +85 °C (−40 to +185 °F) |
| Physical Net Weight | Approximately 1.28 lbs (0.58 kg) |
Technical Features & Field Engineering Context
Signal Filtering and Vibration Extraction
The hardware low-pass and high-pass filtering options block low-frequency structural anomalies (such as thermal expansion drift or structural foundation sway below 25 Hz) while attenuating high-frequency noise spikes above 350 Hz. This isolation ensures that the structural casing acceleration spectrum sent to the control room directly corresponds to specific aero-derivative compressor blade passes or rotational imbalances.
Hazardous Area Installation Constraints
- Safety Barriers: For installations located in Class I, Division 1 or Zone 1 hazardous environments, this module must be routed through properly matched Zener barriers or galvanic isolation blocks to meet intrinsic safety criteria.
- Grounding Architectures: Keep the structural shield completely floating at the sensor head enclosure. Maintain a continuous single-point earth ground return connection path inside the main local instrument panel to prevent localized ground potential differences from shifting the -10 V DC bias baseline.
Commercial and Logistics Status
- Condition: New Original (Factory Sealed surplus or Never Used Original Packaging).
- Warranty Period: 12-month comprehensive component operational warranty from the date of dispatch.
- Global Lead Time: Typically ships within 2 to 5 business days for localized inventory; standard factory backlogs can scale significantly for non-stocked hardware parameters.
- Documentation: Factory data tracking sheets and specific safety drawings (e.g., drawing 141243 or 141110) should be referenced for structural mounting verify protocols.
Commercial Note: Supply levels for specific frequency options within the legacy 86517 series fluctuate according to energy sector repair demand cycles. The listed market pricing represents an indicative value; contact the sales desk directly for an itemized, firm commercial quote.
Frequently Asked Questions
Can this module accept a 100 mV/g constant-current IEPE accelerometer?
No. The 86517-01 variant is explicitly engineered with a charge-amplifier front end set to a sensitivity of 50 pC/g. Connecting a voltage-mode IEPE accelerometer will cause input stage saturation and render output signals invalid.
What occurs if the continuous supply voltage dips significantly below −24 V DC?
A sag in input power directly diminishes the dynamic headroom of the internal high-gain amplification circuits. This restriction can clip high-amplitude transient vibration peaks, introducing harmonic distortion artifacts into the downstream monitoring systems. Ensure your power distribution architecture can deliver a stable voltage under full system configurations.
