The Bently Nevada 135489-03 is a 4-channel Barrier Seismic I/O Module designed for use within the 3500 Series machinery protection system. This module features internal safety barriers and is specifically engineered to interface with seismic transducers, providing essential signal conditioning for vibration monitoring in critical rotating and reciprocating machinery. It serves as a key component in the 3500/70M Recip Impulse Velocity Monitor configuration, facilitating the detection of crankcase and crosshead vibration to ensure operational reliability.
| Product Model | 135489-03 |
| Channels | 4 |
| Sensor Supply | 8 to 32 Vdc @ 4 mA |
| Input Type | 100 mV/g +/- 5% |
| Frequency Range | 1 Hz to 10 kHz |
| Accuracy | +/- 0.5% of full scale @ 25 degC |
| Recorder Output | 4-20 mA |
| Operating Temperature | -40 degC to +85 degC |
| Storage Temperature | -55 degC to +90 degC |
| Humidity | 5% to 95% RH non-condensing |
| Relay Contacts (Max) | 5A |
| TMR Relay (Max) | 2A |
| I.S. Circuits (Max) | 30V |
It is an I/O module for the Bently Nevada 3500 monitoring system, featuring internal barriers to support seismic sensor inputs for vibration monitoring.
It supports four channels, typically used for processing data from Velomitor sensors to monitor parameters such as acceleration and velocity in reciprocating compressors.
The 135489-03 is a standard component of the 3500 series. While some components may reach End-Of-Life (EOL) status, this module remains a critical part of the 3500 infrastructure for legacy and active installations.
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