Bently Nevada 128240-01 3500/42M

The Bently Nevada 128240-01 3500/42M Proximitor/Seismic I/O module provides comprehensive vibration monitoring for 3500 systems. This module interfaces with both Proximitor sensors and seismic transducers for complete machine protection. The unit delivers four isolated channels with advanced signal processing for reliable vibration analysis.

Technical Specifications

Parameter	Specification
Product Type	Proximitor/Seismic I/O module
Model	3500/42M
Compatibility	Bently Nevada 3500 system
Number of Channels	4 inputs (isolated)
Input Types	Proximitor sensors, seismic accelerometers, velocity pickups
Input Signal Range	±5V, ±10V (configurable)
Frequency Range	0.2 Hz to 10 kHz (configurable)
Dynamic Range	85 dB (minimum)
Isolation Voltage	500V DC (channel-to-channel)
Integration Options	Velocity, displacement (programmable)
Filter Types	Low-pass, high-pass, band-pass (configurable)
Dimensions (W x H x D)	241 x 152 x 25 mm
Weight	0.9 kg
Internal Components	4 x isolation amps, 1 x DSP, 4 x ADCs, 4 x filters, 4 x DACs
Signal Processing	Digital filtering, FFT, trend analysis, peak detection
Connector Type	25-pin D-sub (female)
Power Supply	24V DC (from backplane)
Power Consumption	7W (typical)
LED Indicators	4 x status LEDs (channel health, alarm)
Operating Temperature	-20°C to +65°C
Storage Temperature	-40°C to +85°C
Protection Class	IP20
Mounting	3500 rack (plug-in)
Approvals	CE, UL, CSA, ATEX

Dual Sensor Support for Complete Vibration Monitoring

The Bently Nevada 128240-01 3500/42M supports both Proximitor sensors and seismic transducers. This dual capability covers all major vibration measurement techniques. Users can monitor shaft relative vibration and absolute casing vibration. The module provides comprehensive machine protection with both sensor types.

Four Isolated Channels with Advanced Signal Conditioning

Four independent channels provide 500V DC isolation for reliable signal acquisition. Each channel includes programmable filters for noise rejection and signal optimization. The module handles both AC-coupled and DC-coupled measurements. Users can configure each channel independently for specific applications.

Configurable Frequency Range for Diverse Applications

The module covers 0.2 Hz to 10 kHz for low-speed and high-speed machinery. Programmable low-pass, high-pass, and band-pass filters optimize each measurement. Users can monitor sub-synchronous, synchronous, and harmonic vibration components. This flexibility suits turbines, compressors, and other rotating equipment.

Integration Options for Velocity and Displacement

The module provides programmable integration from acceleration to velocity or displacement. Users can select the appropriate measurement units for their application. Integration algorithms maintain accuracy across the full frequency range. This capability simplifies sensor selection and installation.

Advanced Digital Signal Processing

An integrated DSP performs real-time digital filtering and FFT analysis. The module provides trend analysis and peak detection for predictive maintenance. Users can analyze both steady-state and transient vibration conditions. The processing algorithms ensure accurate and repeatable measurements.

Seamless 3500 Rack Integration

The module plugs directly into the 3500 rack backplane for simple installation. A 25-pin D-sub connector provides field wiring for all sensors. Users can replace modules without system shutdown. The half-height design fits standard 3500 rack configurations efficiently.