BENTLY 3500/22 Transient Data Interface Module

Overview

The 3500/22 occupies a single slot in a 3500 rack and communicates with all monitoring modules (e.g., 3500/40M, 3500/42M) via the internal bus. It continuously acquires dynamic waveforms such as vibration, shaft position, and eccentricity, storing them in onboard memory. Upon alarm events or manual requests, the module transmits these waveforms to host systems like System 1 or third‑party applications using industry‑standard protocols. The 3500/22 is available in various configurations to suit different communication needs.

Key Features

• Dynamic Data Acquisition: Captures raw time‑base waveforms from up to 16 channels simultaneously.

• High Resolution: 16‑bit A/D conversion with sampling rates up to 40 kHz per channel.

• Data Storage: Onboard memory for storing multiple transient events and steady‑state data.

• Communication Ports: RS‑232/RS‑422 for configuration and optional Ethernet ports for Modbus TCP.

• Time Synchronization: IRIG‑B input for precise time‑stamping of events.

• Redundant Communications: Supports redundant Ethernet paths for high availability.

• Web Server: Built‑in web interface for basic monitoring and diagnostics.

Technical Specifications

• Processor: 32‑bit RISC, 200 MHz.

• Memory: 64 MB SDRAM, 32 MB Flash.

• Data Throughput: Up to 10,000 samples per second per channel.

• Communication Protocols: Modbus RTU, Modbus TCP, OPC (via gateway).

• Power Supply: 5 VDC from rack backplane.

• Operating Temperature: -30°C to +65°C.

• Certifications: CSA, CE, ATEX (for use in safe areas).

Applications

The 3500/22 is essential for installations requiring detailed vibration analysis, such as in power plants, oil & gas facilities, and large rotating machinery trains. It enables engineers to perform orbit plots, FFT analysis, and trend diagnostics, helping to identify bearing faults, unbalance, misalignment, and other issues before they lead to failure. The module also serves as a bridge to transfer static process values (temperatures, pressures) to the plant DCS via Modbus.

Configuration and Integration

The module is configured using the 3500 System Configuration Software. Users select which channels to monitor, set trigger conditions for transient capture, and define communication parameters. The TDI can also act as a gateway to export data to condition monitoring software. Its ability to store and forward data makes it a powerful tool for comprehensive machinery protection and diagnostics.

In summary, the BENTLY 3500/22 transient data interface module bridges the gap between protection and diagnostics, providing the high‑fidelity data needed to optimize machinery reliability and performance.