Description
The Bently Nevada 3500/22 Transient Data Interface (TDI) with Printed Circuit Board Assembly (PWA) number 288055-01 is the primary communications link for the Bently Nevada 3500 machinery protection rack. The TDI interfaces between the 3500 monitoring system and compatible machinery management software, such as System 1. It continuously collects steady-state dynamic data and automatically captures crucial transient waveform data during machine startup, coast-down, or unexpected trip events, enabling comprehensive diagnostic analysis of critical rotating machinery.
Product Datasheet
- Model Identification: 3500/22 (TDI)
- PWA Part Number: 288055-01
- Manufacturer: Bently Nevada (Baker Hughes)
- Country of Origin: United States (USA)
- Dimensions: Approximately 241 mm x 24.4 mm x 242 mm (9.50 in x 0.96 in x 9.52 in)
- Weight: Approximately 0.91 kg (2.0 lbs)
- Power Consumption: 5.5 Watts typical, 9.0 Watts maximum
- Front Panel Controls: Hardware key lock switch (RUN / PROGRAM), rack address DIP switches, and a dedicated configuration port
- Status LED Indicators: OK, TX/RX, TM (Trip Multiply), and CONFIG OK
- Supported Communications: Ethernet (10/100 Base-T), USB, and RS-232/RS-422/RS-485 serial interfaces
Target Applications
The 3500/22 TDI module is essential for machinery condition monitoring across various heavy industrial sectors:
- Steam and Gas Turbines: Capturing detailed transient vibration profiles during critical speed transitions, startups, and shutdowns.
- Centrifugal Compressors: Continuous monitoring of shaft vibration, axial position, and casing acceleration to protect against surge conditions.
- Large Power Generators: Interfacing generator bearing data with control room distributed control systems (DCS) for immediate emergency protective action.
- Industrial Pumps and Fans: Providing high-resolution waveform data for balancing, tracking mechanical looseness, and pinpointing structural resonance.
Operating Instructions
To maintain optimal functionality and ensure system communication security, observe the following operational criteria:
- Module Insertion: The TDI must be installed in the slot immediately adjacent to the power supplies on the far left of the 3500 rack. Ensure the rack is completely powered down before seating the module into the backplane connectors to prevent internal data corruption.
- Hardware Key Lock Management: Keep the front panel key switch in the RUN mode during normal operations. Turn the key to the PROGRAM mode only when uploading a new rack configuration profile via the 3500 Configuration Software. Remember to switch back to RUN mode to lock out unauthorized logic alterations.
- Network Integration: Connect the module to an isolated, secure industrial control network using standard shielded Cat5e or Cat6 Ethernet cables. Avoid bridging the TDI directly to external corporate business networks without adequate firewall protections.
- Data Buffering Configuration: Configure the transient trigger parameters inside the monitoring software. Proper threshold settings ensure the internal buffer captures adequate pre-trip and post-trip waveform history when vibration limits are exceeded.
Common Questions & Answers
What is the function of the PWA number 288055-01 on this Bently Nevada module?
The PWA number 288055-01 denotes the specific internal printed circuit board layout and internal component population. It acts as the exact engineering hardware revision reference when managing spare parts inventories or looking up technical field compatibility notes.
How does the 3500/22 handle data if communication with the host computer is lost?
The module features internal static memory buffers. If connection to the software server drops, the TDI continues saving steady-state values and event logs internally, transferring the accumulated historical trends as soon as network communication is restored.
What should I check if the “CONFIG OK” LED remains unlit or turns off?
An unlit CONFIG OK indicator means the module does not contain a valid configuration profile or an asset map mismatch has occurred. Connect a laptop to the configuration port, open the 3500 utility software, verify your rack parameters, and execute a fresh hardware download.
Can a 3500 protection rack operate properly without a 3500/22 TDI installed?
The individual machinery protection modules (like the 3500/42M or 3500/40M) will still execute local machinery safety trips based on internal hardware rules. However, without the TDI, you lose all external communication, remote configuration functionality, Modbus link outputs, and critical diagnostic waveform histories.
