Bently Nevada 3500/42 135489-01 Vibration Displacement Card

Technical Specifications

Parameter	Details
Product Type	Vibration Displacement Monitor Card
Compatibility	Bently Nevada 3500 Series Monitoring System
Number of Channels	4 independent channels
Input Types	Proximity probes (eddy current) for displacement
Input Signal Range	–0.8 V to –21.0 V DC
Displacement Range	0 µm to 2000 µm (adjustable per channel)
Frequency Response	0 Hz to 10 kHz (DC coupled)
Measurement Accuracy	±0.1 % of full scale
Resolution	16-bit (0.001 V)
Sampling Rate	100 samples per second per channel
Filter Options	Low-pass, high-pass, band-pass (software configurable)
Alarm Outputs	4 relay outputs (form C)
Communication Protocol	Modbus RTU, Modbus TCP/IP
Dimensions (H x W x D)	241 mm x 38 mm x 254 mm
Weight	1.2 kg
Power Supply	24 VDC nominal (18 VDC to 32 VDC)
Power Consumption	8.0 W typical
Operating Temperature	–20 °C to +65 °C
Storage Temperature	–40 °C to +85 °C
Protection Class	IP20
Certifications	CE, CSA, ATEX, ABS

Precision Displacement Monitoring

The 3500/42 135489-01 vibration displacement card delivers four channels of high-precision shaft and casing displacement measurements. This module accepts eddy current proximity probe inputs, converting raw voltage signals into engineering units such as micrometers or mils. It achieves ±0.1 % accuracy across the full measurement range, providing reliable data for rotor position monitoring. Additionally, the card offers adjustable displacement ranges per channel, enabling customization for different machine types and operating conditions.

Advanced Signal Conditioning

Each channel on the 3500/42 135489-01 includes configurable filtering options, including low-pass, high-pass, and band-pass settings. Users can tailor the frequency response to isolate specific vibration components, such as synchronous, sub-synchronous, or harmonic frequencies. The card samples at 100 readings per second, capturing both static gap voltage and dynamic displacement data simultaneously. Consequently, this feature supports comprehensive machine diagnostics, including orbit plots and shaft centerline analysis.

Alarm Configuration and Response

The 3500/42 135489-01 provides four relay outputs, each independently configurable for alarm or shutdown functions. Operators can set multiple alarm levels per channel, including warning, danger, and alert thresholds. The module also includes a built-in OK relay, which indicates the health status of the card and connected transducers. Furthermore, the card utilizes a proprietary voting logic for redundant configurations, ensuring high availability in critical applications.

Integration and Mounting

Weighing 1.2 kg and measuring 241 mm x 38 mm x 254 mm, the 3500/42 135489-01 fits into a standard half-height slot in the 3500 rack. The card communicates with the main rack via the backplane bus and supports Modbus RTU and TCP/IP for external data access. Users can integrate this module with System 1 software for advanced vibration analysis and predictive maintenance workflows.