PRODUCT INFORMATION
Product Overview
The Bently Nevada 3500/20 is a Rack Interface Module designed for the Bently Nevada 3500 series machinery protection system. This module serves as the primary communication and configuration interface for the monitoring rack. It installs directly into slot 1 of the rack adjacent to the power supplies. The unit supports communication with external processors, including Transient Data Interface External and Dynamic Data Interface External systems. Although it provides system-wide services, it does not sit directly in the critical machinery trip path.
Engineers configure the rack and retrieve diagnostic records through front and rear communication channels on the module. The unit stores access passwords in onboard non-volatile memory to safeguard rack configuration files and monitor alarm setpoints. Front panel status light indicators confirm hardware health, configuration integrity, transmission status, and trip multiply activation. A keylock switch interface ensures that setpoint alterations remain locked during normal machine operations.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Transducer Power Supply | 24 Vdc |
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| VoltageCompliance | 0 to +12 Vdc |
|---|
| Power Requirements | 18 to 36 VDC |
|---|
| Data Rate | 38.4 k baud |
|---|
| OperatingTemperature | -30°C to +65°C |
|---|
| Maximum Current | <1 mA dc |
|---|
| Extension Cable Capacitance | 69.9 pF/m |
|---|
| Communications | RS232, RS422 |
|---|
| Linear Range | 2 mm |
|---|
| Minimum Target Size | 15.2 mm |
|---|
| Dimensions | 10.2cm X 11.4cm X 13.2cm |
|---|
| Frequency Response | (0 to 10 kHz) |
|---|
| Weight | 0.5 kg |
|---|
TECHNICAL INFORMATION
Features
- Dedicated installation into rack slot 1 adjacent to system power supplies.
- Non-volatile memory retention for system access passwords and operational parameters.
- Integrated front panel LED indicators for OK, TX/RX, TM, and Config OK statuses.
- Front configuration port using standard RS-232 serial communication.
- Dual communication support over RS-232 and RS-422 hardware channels.
- Support for external data processors including TDIX and DDIX devices.
TECHNICAL INFORMATION
Applications
- Configuration management across industrial machinery vibration monitoring racks.
- Data collection routing for external transient and dynamic diagnostic processors.
- Secure parameter protection in rotating turbomachinery protection systems.
TECHNICAL INFORMATION
Connections / Interfaces
- Front-panel RS-232 configuration port for direct PC workstation connection.
- RS-422 communications interface supporting data transfer rates up to 38.4 kbaud.
- Backplane connections supporting TDIX and DDIX dynamic data routing.
TECHNICAL INFORMATION
Installation Guidelines
- Install the module exclusively into slot 1 of the 3500 rack chassis.
- Verify that the adjacent power supply modules are firmly seated prior to module insertion.
- Ensure proper keylock switch settings before attempting configuration downloads.
TECHNICAL INFORMATION
Configuration Guidelines
- Connect a computer running Rack Configuration Software to the front configuration port.
- Input the authorized security password to download modifications to the rack.
- Set the hardware keylock to program mode to permit setpoint updates.
TECHNICAL INFORMATION
Compatibility
- Bently Nevada 3500 series machinery protection rack systems.
- Bently Nevada TDIX and DDIX communications processors.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSBently Nevada 3500 series machinery protection rack systems. Bently Nevada TDIX and DDIX communications processors.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
Which chassis slot does the 3500/20 module occupy?
The 3500/20 Rack Interface Module must always be installed in slot 1 of the 3500 rack chassis.
Does a failure of the 3500/20 interrupt machinery trip protection?
No. The module is not part of the critical monitoring path and does not stop rack monitoring functions.
What is the typical market reference price for the 3500/20 module?
Observed market reference pricing ranges between $668.11 and $3,194.76. These figures are indicative market reference pricing only and are not a final quotation.
What protocols and ports does the 3500/20 interface support?
It provides RS-232 and RS-422 communications at data rates up to 38.4 kbaud using proprietary protocols.
