Overview
The Bently Nevada 3500/20 (part number 125744-02) is a standard rack interface module (RIM) that serves as the central communication hub for the Bently Nevada 3500 Series monitoring system. This module is designed for machinery protection and condition monitoring in industrial applications, facilitating communication between the 3500 monitoring modules (e.g., vibration, temperature, speed) and external systems such as Distributed Control Systems (DCS), Programmable Logic Controllers (PLC), or other monitoring systems. The RIM ensures seamless data transfer, system configuration, and diagnostics.
Key Features
- Standard RIM Configuration: The Rack Interface Module (RIM) is the primary interface to the 3500 rack and supports a proprietary protocol used to configure the rack and retrieve machinery information.
- Slot 1 Installation Requirement: The RIM must be located in slot 1 of the rack (next to the power supplies).
- Compatible External Processors: The RIM supports compatible Bently Nevada external communications processors such as TDXnet, TDIX, and DDIX.
- Non-Intrusive Operation: Although the 3500/20 provides certain common functions for the entire rack, it is not part of the critical monitoring path.
- Efficient Low-Power Design: Typical power consumption of 4.75 watts with a maximum cable length of 2.1 metres (7 feet).
- Serial Communications: Supports RS232/RS422 serial communications.
Technical Specifications
- Part Number: 125744-02
- Product Type: Standard Rack Interface Module (RIM)
- Power Consumption: 4.75 watts (typical)
- Cable Length: 2.1 metres (7 feet) maximum
- Baud Rate: Supports a maximum data rate of 38.4 k baud for serial communications
- Communication Protocols: RS232/RS422 serial communications
- Dimensions: 241.3 mm x 24.4 mm x 241.8 mm (9.5 in. x 0.96 in. x 9.52 in.)
- Storage Temperature Range: -40 °C to +85 °C (-40 °F to +185 °F)
- Manufacturer: Bently Nevada (USA)
Typical Applications
The Bently Nevada 3500 System is used in a variety of industries, including oil and gas, power generation, petrochemical, and manufacturing. The 3500/20 rack interface module is essential for integrating machinery protection and vibration monitoring into larger industrial control systems where real-time condition data must be communicated to external monitoring platforms, predictive maintenance software, or centralized plant control systems.
Compatibility & Replacements
Compatible With
- Bently Nevada 3500 Series monitoring systems
- Bently Nevada external communication processors (TDXnet, TDIX, DDIX)
- Distributed Control Systems (DCS) via serial interface
- Programmable Logic Controllers (PLC) via serial interface
- Third-party monitoring and condition management software supporting RS232/RS422
- Machinery protection and vibration monitoring networks
Replaces / Drop-In Replacement For
- Bently Nevada 3500/20 systems requiring a standard (non-TMR) rack interface module
- Legacy 125744-02 units in existing 3500 monitoring installations
Works With
- Bently Nevada 3500 monitoring software suite
- Vibration sensors, temperature sensors, speed sensors, and pressure sensors compatible with 3500 rack modules
- RS232/RS422 serial communication protocols and standards
- Modbus TCP/IP and TCP/IP-based monitoring platforms (when paired with compatible external communication processors)
