Description
Bently Nevada 149776-02 Trend Indicating/Triggering Module
The Bently Nevada 149776-02 serves as the primary 149776 Trend Indicating/Triggering Module utilized to execute vibration trend acquisition, event triggering, and seismic signal monitoring across 3500 Machinery Protection System platforms. The module processes dynamic transducer inputs, supports synchronous and asynchronous data collection, and provides machine condition information for diagnostic and protection functions.
Suffix Breakdown & Model Matrix
The available documentation identifies 149776-02 as a complete catalog number. No manufacturer-defined suffix matrix or option-code breakdown is provided in the supplied information; therefore, no additional model decomposition is included.
Hardware Specifications
| Parameter |
Specification |
| Model |
149776-02 |
| Brand |
Bently Nevada |
| Type |
Trend Indicating/Triggering Module (TIM) |
| Series |
3500 Machinery Protection System |
| Origin |
USA |
| Input Types |
Seismic and constant current transducers |
| Input Channels |
8 |
| Output Channels |
4 |
| Bandwidth |
Up to 24 kHz |
| Sampling Resolution |
16-bit |
| Processing Modes |
Synchronous and asynchronous |
| Communication Interfaces |
Ethernet, RS485 |
| Maximum DSM Capacity |
Up to 150 DSMs per data acquisition computer |
| Power Supply |
24 VDC |
| Operating Temp |
-54 deg C to +121 deg C |
| Dimensions |
150 x 100 x 50 mm |
| Weight |
0.23 kg |
| Primary Function |
Trend indication and event triggering for machine condition monitoring |
Rotor Dynamics Data Acquisition
The 149776-02 acquires vibration and seismic information used for rotor dynamics evaluation within machinery monitoring systems. High-resolution sampling enables observation of shaft-related dynamic behavior, including amplitude changes, frequency components, and transient operating conditions.
By supporting both synchronous and asynchronous processing methods, the module can collect data referenced to rotational speed events as well as continuously sampled vibration signals. These datasets assist in the identification of imbalance, misalignment, resonance response, and other rotating machinery conditions evaluated through the associated monitoring platform.
The module functions as a data acquisition and triggering component; interpretation of rotor dynamic behavior depends on the connected monitoring software and system configuration.
Frequently Asked Questions
Q: Does the 149776-02 directly support seismic transducers?
A: Yes. The module supports seismic and constant current transducer input types as specified in the supplied documentation.
Q: Can the module perform event-triggered data capture?
A: Yes. The TIM incorporates triggering functionality intended for capturing machine condition events and associated diagnostic information.
Q: Is hot replacement supported while the system remains energized?
A: Hot-swap capability is not specified in the available documentation. Module replacement procedures should follow the applicable 3500 system maintenance instructions.
Field Installation Guidelines
-
Install the module in the designated slot specified by the 3500 system configuration.
-
Verify input channel assignments before connecting seismic or constant current transducers.
-
Route low-level vibration signal wiring separately from power and motor control cables.
-
Maintain shield continuity according to plant grounding practices and system documentation.
-
Confirm communication settings for Ethernet and RS485 interfaces prior to commissioning.
-
Validate trigger configuration and channel mapping after installation.
-
Inspect connector retention and terminal integrity before placing the monitoring system into service.
