Description
Bently Nevada 3500/22-01-01-00 Transient Data Interface Module
Configured for transient and steady-state machinery data acquisition in the 3500 monitoring architecture, the Bently Nevada 3500/22-01-01-00 (3500/22 Transient Data Interface module) provides direct physical/electrical execution of high-speed signal aggregation and rack-level communication within the Bently Nevada 3500 rack system. The module occupies Slot 1 and functions as the primary data interface between internal monitor modules and external diagnostic platforms.
Suffix Breakdown & Model Matrix
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3500: Rack system family identifier
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/22: Transient Data Interface (TDI) module type
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01: Standard transient monitoring configuration
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01: 10/100Base-TX Ethernet communication option
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00: No additional agency or firmware variant options
Hardware Specifications
| Parameter |
Specification |
| Model |
3500/22-01-01-00 |
| Brand |
Bently Nevada |
| Weight |
0.45 kg |
| Dimensions |
115 mm x 124 mm x 45 mm |
| Operating Temp |
-40 deg C to +85 deg C |
| Power Consumption |
7.7 W typical |
| Input Channels |
8 channels, software-configurable |
| Sampling Rate |
Up to 8 kHz per channel |
| Resolution |
16-bit ADC |
| Frequency Range |
0.5 Hz to 4 kHz |
| Communication |
10/100 Mbps Ethernet, RS-232, RS-485 |
| Isolation |
1500 Vac channel-to-ground |
| Backplane Power |
24 VDC rack backplane |
TSI-Oriented Signal Acquisition & Eddy-Current Data Handling
The module operates as a rack-level synchronization and buffering node for eddy-current and seismic measurement chains. In typical TSI (Turbine Supervisory Instrumentation) configurations, the TDI performs normalization of probe scaling coefficients and maintains consistent gap voltage referencing (commonly centered around negative DC bias regions in proximity probe systems). Cross-channel synchronization ensures that rotor dynamic phase vectors remain temporally aligned during transient capture events such as blade loss or surge conditions.
The internal buffer architecture supports pre-trigger and post-trigger acquisition, enabling reconstruction of rotor vibration trajectories for orbit analysis. Signal integrity is maintained through rack-wide timing alignment, reducing inter-module phase drift during high-speed sampling intervals.
Frequently Asked Questions (FAQ)
Q: Does the module participate in the protection voting logic of the 3500 system?
A: No. The module operates outside the protection chain and functions purely as a data acquisition and communication interface.
Q: Can the TDI module be hot-swapped under live rack conditions?
A: Yes. The module supports hot-swapping; however, transient data capture is interrupted during insertion or removal.
Q: What is the maximum synchronization accuracy across rack modules?
A: Rack-wide synchronization is maintained at approximately 1 ms using IRIG-B or SNTP time sources.
Field Installation Guidelines
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Install exclusively in Slot 1 of the 3500 rack backplane
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Ensure backplane power is isolated before initial insertion
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Verify Ethernet shielding continuity using grounded twisted-pair cabling
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Maintain minimum separation between communication and vibration signal cables
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Apply rack grounding to a single-point earth reference to reduce noise coupling
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Confirm IRIG-B or SNTP synchronization source stability prior to commissioning
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Avoid routing signal cables parallel to high-current switching conductors for extended distances
