Bently Nevada 161580-01 3500/22M Transient Data Interface

The Bently Nevada 161580-01 is associated with the 3500/22M Transient Data Interface (TDI), which connects the 3500 machinery monitoring system to host software for machinery data collection and analysis. The TDI combines rack interface functions with data collection capabilities, transferring steady-state and transient waveform data through Ethernet. It occupies the rack's dedicated front interface slot and supports communication with compatible M Series monitor modules.

Technical Specifications

Data Collection and Communication

The 3500/22M collects steady-state data as a standard function. With an optional Channel Enabling Disk, it can also collect dynamic and transient waveform data. The Ethernet interface transfers collected information to the host software for machinery condition analysis.

The TDI works with compatible M Series monitor modules, including the 3500/40M and 3500/42M. Confirm the installed monitor configuration and data collection requirements before selecting the required options.

Rack Status and Front Panel Controls

The front panel provides four indicators for checking module operation and rack status:

• OK: Indicates that the TDI is operating properly.
• TX/RX: Indicates communication with other rack modules.
• TM: Indicates that the rack is in Trip Multiply mode.
• CONFIG OK: Indicates that the rack has a valid configuration.

The rack reset button clears latched alarms and the Timed OK Channel Defeat function. It performs the same function as the Rack Reset contact on the I/O module.

The I/O module OK relay provides an external indication of normal rack operation or a detected rack fault. The relay operates in a normally energized mode, and its contact arrangement supports the selected NOT OK annunciation logic.

Rack Installation and System Configuration

The TDI occupies the first full-height front slot of the 3500 rack, next to the power supplies. Each rack requires one TDI or one RIM. The associated I/O module occupies one full-height rear slot.

For Triple Modular Redundant (TMR) applications, the system requires a TMR version of the TDI. This version adds monitor channel comparison, continuously comparing three redundant monitor outputs against a configured percentage tolerance. If one monitor's information differs from the other two beyond the configured limit, the TDI flags the monitor as being in error and records an event in the System Event List.

The TDI is not part of the critical monitoring path. Its interface and data collection functions do not determine the normal operation of the monitoring system itself.

Frequently Asked Questions

Q: What is the main function of the Bently Nevada 3500/22M?

A: It collects steady-state and, when enabled, dynamic or transient waveform data from compatible 3500 monitor modules and transfers the information to host software through an Ethernet connection.

Q: Does the 3500/22M support transient waveform collection as standard?

A: Static data collection is standard. Dynamic or transient waveform collection requires the optional Channel Enabling Disk.

Q: What is the difference between a standard TDI and a TMR TDI?

A: The TMR version adds comparison of three redundant monitor outputs and reports discrepancies that exceed the configured tolerance. Confirm the required TDI version against the rack's redundancy configuration.

Q: Where is the TDI installed in a 3500 rack?

A: It occupies the first full-height front slot next to the power supplies. Its associated I/O module occupies a full-height rear slot.