Description

The Bently Nevada 86517-01-01-01-CN is an Accelerometer Interface Module designed for signal conditioning and transducer interfacing in industrial machinery monitoring applications. Installed within vibration monitoring loops, this signal processing unit conditions high-impedance charge signals originating from piezoelectric accelerometers into standardized, low-noise voltage signals suitable for machinery protection and diagnostic hardware.

Configured with specific operational parameters, the Bently Nevada 86517-01-01-01-CN Accelerometer Interface Module features a 50 pC/g transducer charge input sensitivity and a dual corner-frequency bandpass filter spanning 25 Hz high pass to 350 Hz low pass. Operating with a -10 Vdc signal bias voltage, the module conditions high-frequency vibration data while suppressing unwanted out-of-band electrical noise and mechanical resonance. This variant incorporates the CN agency approval option, covering ATEX, IECEx, and Chinese NEPSI certifications for installation in hazardous industrial environments.

Features

• Specialized charge-to-voltage signal conditioning for piezoelectric accelerometer transducers.
• Calibrated transducer charge input sensitivity rated at 50 pC/g.
• Integrated bandpass filtering with a 25 Hz high-pass corner and a 350 Hz low-pass corner.
• Stable -10 Vdc DC signal bias voltage output configuration.
• Certified under ATEX, IECEx, and Chinese NEPSI hazardous area safety approvals (CN option).

Applications

• Signal conditioning for high-temperature or high-frequency piezoelectric accelerometers
• Machinery protection and condition monitoring loops on turbines, compressors, and gearboxes
• Interfacing field vibration transducers with centralized machinery monitoring systems
• Hazardous area vibration monitoring in processing facilities requiring NEPSI, ATEX, or IECEx compliance

Ordering Information

Technical Specifications

General

Performance

Installation Guidelines

1. Confirm that the Bently Nevada 86517-01-01-01-CN module specifications match the connected piezoelectric transducer charge sensitivity (50 pC/g) and system voltage requirements.
2. Inspect the module enclosure and terminal assemblies prior to mounting to ensure mechanical integrity.
3. Install the device inside a suitable protective housing or enclosure located near the monitored asset, keeping cable runs between the transducer and interface module as short as practical.
4. Route high-impedance transducer input wiring separately from high-voltage AC lines or noisy variable frequency drives to prevent signal distortion.
5. Connect shielding and protective grounding in accordance with hazardous area classification standards (ATEX/IECEx/NEPSI) and system ground architecture.
6. Verify power supply levels and output signal connections prior to system energization and commissioning.

Replacement Recommendations

1. Disconnect input power and signal lines, following lock-out/tag-out and intrinsic safety field protocols.
2. Note all wiring connections and terminal positions before disconnecting the existing unit.
3. Verify that the replacement unit carries the exact ordering options (86517-01-01-01-CN) to guarantee identical charge sensitivity, filtering, bias voltage, and hazardous area approvals.
4. Securely mount the replacement module and restore terminal wiring according to engineering documentation.
5. Perform post-replacement loop calibration and verify baseline vibration readings at the monitoring system rack.

Compliance and Certifications