Description
The Bently Nevada 3500/22-01-01-00 is the primary interface between the 3500 Machinery Protection System and the System 1 Asset Management software. The TDI acts as the “brain” of the rack for data acquisition, collecting static and dynamic (transient) vibration data from all monitor modules and passing it to the host computer via Ethernet.
Ordering Code Breakdown (3500/22-01-01-00)
- 3500/22: Transient Data Interface Module.
- 01: Standard 10/100 Base-T Ethernet Media (RJ45).
- 01: High-speed USB 2.0 Front Port Cable (Included).
- 00: No Agency Approvals (Standard/Non-Hazardous).
Availability and Procurement
- Condition: New Original (Factory Sealed) or New Surplus.
- Warranty: 12-month standard industrial warranty.
- Lead Time: Usually in stock; ships within 2–3 business days.
- Pricing: Price reflects the module’s role as a critical data hub; contact us for a firm quote.
Technical Specifications
The TDI is a high-performance module that supports both the protection functions of the rack and the diagnostic requirements of the maintenance team.
| Parameter | Specification |
| Ethernet Port | 10/100 Base-T (RJ45) for System 1 connection |
| Front Port | USB 2.0 for Rack Configuration software |
| Dynamic Data | Supports collection of waveforms (transient data) |
| Internal Clock | Battery-backed; synchronizes with NTP servers |
| Relay | 1 dedicated “OK” Relay (SPDT) |
| Communication | Modbus TCP/IP and Bently Nevada proprietary protocol |
| Operating Temp | -30 °C to +65 °C (-22 °F to +150 °F) |
Engineering Insights: Functionality and Integration
As an architect who has integrated hundreds of Bently Nevada racks into plant-wide SCADA systems, I suggest focusing on these critical TDI aspects:
1. Protection vs. Condition Monitoring
While the monitor modules (like the 3500/42M) handle the actual machine trips, the TDI is essential for Condition Monitoring. Without a functioning TDI, you cannot stream high-resolution waveform data to System 1 for spectrum or orbit analysis. However, a failure of the TDI does not affect the rack’s ability to trip the machine based on pre-set alarm levels in the monitors.
2. Configuration Access
The 3500/22 is the gateway for the 3500 Rack Configuration Software.
- Front Port: The USB 2.0 port is the fastest way to upload or download configuration files during commissioning.
- Ethernet Port: Once configured, the Ethernet port allows for remote configuration over the network, provided the security switch on the backplane is in the “Program” position.
3. Data Buffering
The TDI has internal memory to buffer data during network outages. This ensures that transient events (like a turbine startup or shutdown) are captured even if the connection to the System 1 server is temporarily lost.
4. Modbus Gateway
The 3500/22 supports Modbus TCP/IP. This is often used to send overall vibration values and “OK” statuses to a third-party PLC or DCS (like a DeltaV or Siemens S7) without needing an additional 3500/92 Communication Gateway module.
FAQ
Q: Can I replace an old 3500/20 (RIM) with a 3500/22 (TDI)?
A: Yes, the 3500/22 is the functional replacement for the legacy 3500/20 Rack Interface Module. However, you will need to update your Rack Configuration software and potentially your System 1 database to recognize the new module type.
Q: Where should the 3500/22 be installed in the rack?
A: The TDI must be installed in the slot immediately to the right of the power supplies (typically Slot 1). It requires a specific TDI I/O module in the rear of the rack to provide the Ethernet connection.
Q: What does the “OK” relay on the TDI do?
A: This is the Rack OK Relay. It de-energizes if the TDI detects an internal rack failure or if one of the modules in the rack reports a “Not OK” status. It is typically wired into the plant’s annunciator system.
| BENTLY 3500/20 125744-02 |
| Bently Nevada 3500/15 133292-01 |
| Bently Nevada 3500/15 127610-01 |
