Description
Bently Nevada 149811-01 Trendmaster Input Card
Configured for high-resolution vibration and seismic monitoring in DSM systems, the Bently Nevada 149811-01 (149811 Trendmaster Input Card) provides direct analog signal acquisition, onboard processing, and RS-485/Ethernet communication for rotating machinery condition tracking and predictive diagnostics.
Suffix Breakdown & Model Matrix
The 149811-01 is provided as a single catalog item. No manufacturer-defined suffix variations or option codes are documented; therefore, no additional model decomposition is applicable.
Hardware Specifications
| Parameter |
Specification |
| Model |
149811-01 |
| Brand |
Bently Nevada |
| Type |
Trendmaster Input Card (Analog Input Module) |
| Series |
DSM Data Signal Management System |
| Origin |
USA |
| Input Types |
Seismic, velocity, displacement, constant current transducers |
| Input Channels |
4–8 (depending on configuration) |
| Bandwidth |
Up to 24 kHz |
| Sampling Resolution |
16-bit |
| Sampling Rate |
Up to 50 kHz |
| Signal Processing |
Onboard FFT, RMS detection, peak detection |
| Communication Interfaces |
RS-485, Ethernet |
| Maximum DSM Capacity |
Up to 150 per data acquisition computer |
| Power Supply |
24 VDC |
| Operating Temp |
–54 deg C to +121 deg C |
| Storage Temp |
–40 deg C to +85 deg C |
| Humidity |
95% non-condensing |
| Dimensions |
150 × 100 × 50 mm |
| Weight |
0.5 kg |
| Primary Function |
Analog signal acquisition and processing for vibration and seismic monitoring |
Eddy-Current Probe Scaling & Cross-Talk Suppression
The 149811-01 includes configurable input scaling for eddy-current and other displacement probes, allowing precise calibration to measured machine gaps. Onboard cross-talk suppression routines mitigate interference between channels, ensuring accurate vibration and seismic readings even in densely instrumented racks. Signal conditioning includes configurable gain and filtering to maintain fidelity across the full 20–24 kHz bandwidth, supporting high-resolution FFT and RMS analysis without introducing aliasing artifacts.
Frequently Asked Questions
Q: Can multiple input types be used simultaneously on the 149811-01?
A: Yes. The module supports seismic, velocity, displacement, and constant current transducers concurrently, provided that channel configuration matches the specified 4–8 input channels.
Q: Is hot-swapping allowed for this input card?
A: No. The DSM chassis must be powered down before installation or removal to avoid damage to circuitry and connected sensors.
Q: How is grounding managed for noise reduction?
A: Proper shield connection and grounding to the DSM chassis are required to minimize signal noise. Twisted-pair wiring is recommended for analog sensor inputs.
Field Installation Guidelines
-
Mount the module in the designated DSM slot following rack orientation guidelines.
-
Verify input channel assignments prior to connecting seismic, velocity, or displacement transducers.
-
Route analog signal wiring separately from power and motor control cables.
-
Ensure shields of input cables are connected to chassis ground at a single point to prevent ground loops.
-
Confirm RS-485/Ethernet interface termination and addressing before system power-up.
-
Validate onboard signal processing configuration (FFT/RMS settings) after installation.
-
Inspect connectors and retention latches to maintain secure connections under industrial vibration conditions.
