3500/20-01-02-00 Bently Nevada 3500 Series Standard RIM Module

Product Overview

The Bently Nevada 3500/20-01-02-00 is a primary Rack Interface Module designed for 3500 Series machinery protection systems.

Engineers install this core module directly into slot 1 of the main rack adjacent to the power supplies.

It provides central data integration and handles internal rack configuration using proprietary protocols.

The module collects essential health data without placing itself inside the critical machinery shutdown path.

This layout ensures normal system monitoring continues uninterrupted even during routine communication updates.

The 3500/20-01-02-00 assembly includes a standard RIM main board paired with an RS232/RS422 serial interface rear module.

Plant operators rely on this gateway to connect field instrumentation to higher-level plant control computers.

Technical Specifications

• Brand: Bently Nevada
• Part Number: 3500/20-01-02-00
• Series: 3500 Series System
• Module Type: Standard Rack Interface Module (RIM) with RS232/RS422 I/O
• Measurement Range: System configuration dependent; handles dynamic vibration and static position values
• Frequency Response: Passes raw dynamic signals up to 20 kHz to compatible processors
• Sensitivity: Digital data pass-through maintains full resolution of connected monitoring channels
• Linearity: 100% digital data integrity across internal rack communication backplane
• Resolution: Preserves 16-bit analog-to-digital resolution from individual rack monitor channels
• Power Consumption: 4.75 Watts typical power draw
• Front Panel Baud Rate: Up to 38.4 k baud via front RS232 port
• Rear I/O Baud Rate: Up to 38.4 k baud via RS232/RS422 ports
• OK Relay Contact Rating: Rated to 5A @ 24 Vdc / 120 Vac (120 Watts / 600 VA maximum)
• Operating Temperature Range: -30°C to +65°C (-22°F to +150°F)
• Storage Temperature Range: -40°C to +85°C (-40°F to +185°F)
• Environmental Resistance: 95% non-condensing relative humidity resistance
• Interference Shielding: Internal arc suppressors on normally closed relay contacts
• Main Board Dimensions: 241.3 mm x 24.4 mm x 241.8 mm (9.5 in. x 0.96 in. x 9.52 in.)
• I/O Board Dimensions: 241.3 mm x 24.4 mm x 99.1 mm (9.5 in. x 0.96 in. x 3.90 in.)
• Main Board Weight: 0.91 kg (2.0 lbs.)
• I/O Board Weight: 0.45 kg (1.0 lbs.)
• Maximum RS232 Cable Distance: 30 meters (100 feet)
• Maximum RS422 Cable Distance: 1200 meters (4000 feet)
• Certifications: Manufactured to standard industrial automation guidelines without restrictive agency options

Compatibility & Hardware Integration

The 3500/20-01-02-00 communicates seamlessly with external processors including TDXnet, TDIX, and DDIX devices.

It occupies one full-height front slot and one full-height rear slot in any standard 3500 Series rack enclosure.

The unit supports daisy-chain connections across multiple racks using its dedicated RS422 rack connectors.

Engineers can set unique network identification using the physical 63-position address switch located on the front panel.

Installation Guidelines

• Always switch off main rack power before inserting or removing hardware modules.
• Insert the main RIM board into slot 1 directly next to the power supply modules.
• Mount the RS232/RS422 I/O module in the corresponding rear slot directly behind slot 1.
• Set the rear hardware toggle switch to match your network physical layer requirement (RS232 or RS422).
• Set the 63-position address switch on the front panel before commissioning the network.
• Ensure RS232 cables do not exceed 30 meters to prevent serial signal degradation.
• Keep RS422 serial runs under 1200 meters and use shielded twisted-pair cabling.

Diagnostics & Maintenance Convenience

Front panel LEDs give operators immediate visual status feedback during routine inspection rounds.

The OK LED lights green when the 3500/20-01-02-00 hardware runs internal self-tests successfully.

The TX/RX LED flashes active yellow during active communication across the internal backplane.

The CONFIG OK LED verifies the rack holds a valid software configuration file.

A dedicated front panel Reset button allows fast clearing of latched alarms and timed channel defeats.

The I/O module features dry contact inputs for remote Trip Multiply, Alarm Inhibit, and Rack Reset control.

Typical Application Scenarios

Power generation facilities use the 3500/20-01-02-00 module to link steam turbine monitoring racks to DCS network hubs.

Petrochemical plants install this RIM to pass compressor vibration trends to machinery management diagnostic software.

Refineries utilize the RS422 multi-drop capability to loop several critical pump racks back to a central control room.

Packaging & Express Delivery Services

• Package Contents: Standard Bently Nevada 3500/20-01-02-00 RIM main card and RS232/RS422 rear I/O module.
• Standard Packaging: Anti-static ESD protective bag enclosed in heavy-duty industrial foam packaging.
• Dispatch Lead Time: Ships within 24 to 48 hours following order confirmation.
• Express Carriers: Express worldwide door-to-door delivery via FedEx, UPS, or DHL.
• Warranty Term: Includes 12-month full coverage warranty starting from date of shipment.

Global PLC Spare HUB's Insight

In our field maintenance experience, serial communication faults on the 3500/20-01-02-00 often stem from physical setup errors rather than hardware component failure.

During a recent site audit at a gas compression station, site technicians reported dropping RS422 communication between rack 2 and the plant host computer.

Our team checked the hardware and found the installer had left the rear toggle switch set to RS232 while running a 300-meter field cable.

Flipping the rear toggle switch to RS422 immediately restored continuous data transmission to the 3500 Series software software suite without replacing any physical hardware modules.

We always recommend verifying the DIP switches, address dials, and line termination jumpers before condemning a communication interface module during outage troubleshooting.

Purchasing Guide

Verify your system hardware requirements carefully before placing an order for a replacement 3500 Series module.

Determine whether your system uses standard monitoring protocols or requires a Triple Modular Redundant (TMR) architecture.

This standard unit suits single-bus monitoring frameworks but will not support hardware voting comparison across three channel lines.

Check your rear connection infrastructure to select between RS232/RS422, internal modem, or Data Manager I/O board variants.

Frequently Asked Questions

Question: Can I pull the 3500/20-01-02-00 module out while the rack monitors active machinery?

Answer: Yes, removing the RIM will not interrupt active machinery protection because it sits outside the critical monitoring trip path.

Question: What cable type works best for RS422 serial runs up to 1000 meters?

Answer: Use high-quality individually shielded twisted-pair wire to prevent electromagnetic noise from interfering with data rates up to 38.4 k baud.

Question: Why does my CONFIG OK LED remain turned off after inserting the module into slot 1?

Answer: An unlit CONFIG OK LED means the rack needs a valid configuration file downloaded via the 3500 Rack Configuration Software.

Question: How do I change the communication protocol from RS232 to RS422 on the rear I/O card?

Answer: Locate the physical RS232/RS422 selector switch on the rear I/O module and slide it directly to your preferred communication standard.

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