Bently Nevada 3500/72M-01-00

Ordering Information

Rod Position Monitor

3500/72M - AA-BB

A: I/O Module Type

01 I/O Module with Internal Terminations

02 I/O Module with External Terminations

03 I/O Module with Internal Barriers and Internal Terminations

B: Hazardous Area Approval Option

00 None

01 cNRTLus (Class 1, Division 2)

02 ATEX/IECEx/CSA (Class 1, Zone 2)

Technical Parameters

Channels: 2 independent rod-position sensor inputs for the Bently Nevada 3500/72M-01-00

Sensor Types Supported:

Linear variable differential transformers (LVDTs)

Magnetostrictive or potentiometric rod-position transducers

Input Range: ± 10 V DC analog (programmable ± 5 V to ± 15 V spans)

Resolution: 16-bit A/D conversion per channel in the Bently Nevada 3500/72M-01-00 (≈ 0.0015 % of span)

Accuracy: ± 0.1 % of full-scale after linearization

Sampling Rate: 1 kHz per channel, simultaneous acquisition

Isolation: ≥ 1 kV channel-to-chassis and channel-to-channel

Input Protection: Overvoltage clamp to ± 30 V; reverse-polarity and surge protection

Environmental:

Operating Temp: 0 °C to +70 °C

Storage Temp: –40 °C to +85 °C for the Bently Nevada 3500/72M-01-00

Humidity: ≤ 95 % RH, non-condensing

Product function

Position Conditioning: Applies excitation, buffering, and conditioning via Bently Nevada 3500/72M-01-00, then digitizes and linearizes to true displacement units.

Dynamic Monitoring: Captures high-speed position transients and dwell times for failure detection.

Data Communication: Broadcasts real-time position and diagnostics over the 3500 backplane bus.

Application Areas

Reciprocating Compressors & Engines: Continuous rod-position feedback through the Bently Nevada 3500/72M-01-00 for surge avoidance and performance tuning.

API-618 Compliance: Meets precision requirements for critical protection systems.

Integrating with DCS/SCADA: Via 4–20 mA or digital-output modules.

Maintenance & Diagnostics: Enables early detection of wear using Bently Nevada 3500/72M-01-00 motion profiles.