Description

Product Description

The Bently Nevada 3500/22M 146031-01 Ethernet I/O Module is the rear-mounted communication interface used in conjunction with the 3500/22M Transient Data Interface (TDI). Installed behind Slot 1 of the rack, it forms the physical network bridge that enables external communication between the 3500 system and plant-level monitoring platforms.

This module is responsible for all Ethernet-based data exchange functions, including System 1 connectivity, waveform transfer, and rack-level configuration management. It also provides the hardware interface for system health signaling through the OK relay output.

The unit operates outside the protection loop, ensuring that machinery protection remains active even if the communication interface is removed or fails.

Communication Architecture

• Rear I/O Ethernet interface module for 3500/22M TDI systems

• Provides copper RJ-45 network connection

• Supports 10/100 Mbps auto-negotiated communication

• Auto MDI/MDIX eliminates crossover cable requirements

• Fully compliant with IEEE 802.3 / 802.3u standards

Supported data services:

• System 1 condition monitoring communication

• High-speed vibration waveform transmission

• Transient event data transfer

• Rack configuration upload and download

• Modbus TCP communication over Ethernet

Electrical Characteristics

• Powered through 3500 rack backplane (no external supply required)

• Integrated with TDI module power consumption profile (approx. 10.5 W system load)

• OK relay output:

• 5 A @ 24 VDC or 120 VAC

• Maximum switching load: 120 W / 600 VA

• Gold-plated low-current contacts (down to 1 mA @ 1 VDC)

• Built-in arc suppression design

• Normally energized operating state

Functional Behavior

• Establishes Ethernet communication path for the TDI processor

• Enables real-time vibration and transient data streaming

• Provides rack health status output to DCS/PLC systems via relay

• Supports full integration with M-series monitor modules

• Maintains communication continuity during hot-swap operations

Mechanical Configuration

• Installation location: Rear of rack behind Slot 1 (TDI position)

• Form factor: Full-height rear I/O module

• Dimensions: 241 × 24 × 100 mm

• Weight: 0.20 kg

• Designed for direct mating with 3500 rack backplane connectors

Environmental Performance

• Operating temperature range: -30°C to +65°C

• Storage temperature range: -40°C to +85°C

• Relative humidity: 0–95% non-condensing

• Designed for continuous duty in harsh industrial environments

• Suitable for refinery, offshore, turbine, and compressor monitoring systems

System Integration Role

• Provides Ethernet hardware layer for 3500/22M TDI systems

• Enables System 1 diagnostics and visualization connectivity

• Supports Modbus TCP for third-party control system integration

• Compatible with all M-series modules including 3500/40M, 3500/42M, and 3500/45M

• Ensures uninterrupted communication during module maintenance or replacement

FAQ

Q1: Is this module part of the protection system logic?
No. It operates strictly as a communication interface and does not affect protection functions.

Q2: Can the system run without this I/O module?
Yes, but external Ethernet communication and System 1 connectivity will be unavailable.

Q3: Is the module hot-swappable?
Yes. It is designed for replacement without powering down the rack.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems