Advanced Four-Channel Monitor for Vibration and Position Measurement
The Bently Nevada 3500/42M-01-02 is a high-performance Proximitor Seismic Monitor designed for continuous machinery protection and condition monitoring. It combines precision measurement, intelligent signal conditioning, and robust communication capabilities to ensure operational reliability in demanding industrial environments.
This four-channel module processes inputs from proximity probes and seismic transducers, providing real-time vibration and position readings. It allows flexible channel pairing, so engineers can configure channels 1–2 and 3–4 independently or for identical monitoring tasks.
Key Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model Number | 3500/42M-01-02 |
| Product Type | Proximitor Seismic Monitor |
| Series | 3500 Machinery Protection System |
| Country of Origin | USA |
| Weight | 910 g |
| Condition | In Stock |
Electrical and Measurement Characteristics
| Feature | Specification |
|---|---|
| Input Type | Proximity and Seismic Transducer Inputs |
| Signal Conditioning | Real-time vibration and position processing |
| Output Impedance | 550 Ω (Buffered Transducer Output) |
| Transducer Power Supply | -24 VDC |
| Recorder Current Range | +4 to +20 mA proportional to full-scale |
| Voltage Compliance | 0–12 VDC |
| Load Resistance | 0–600 Ω |
| Accuracy | ±0.25% at 25°C; ±0.7% across full range |
| Update Rate | ≤100 ms per channel |
| Resolution | 0.3662 µA per bit |
The 3500/42M-01-02 ensures accurate analog output scaling with minimal latency, allowing fast and reliable signal feedback in high-speed rotating machinery.
LED Indicators and Front Panel Functions
- OK LED – Confirms that the monitor operates normally.
- TX/RX LED – Indicates active communication within the 3500 rack.
- Bypass LED – Shows when the channel operates in bypass mode for maintenance.
Each channel includes a short-circuit protected coaxial connector, simplifying diagnostics and transducer testing.
Shaft Absolute and Buffered Outputs
| Parameter | Specification |
|---|---|
| Buffered Output Type | Coaxial connector per channel |
| Shaft Absolute Output Impedance | 300 Ω |
| Signal Protection | Integrated circuit short-circuit defense |
Buffered outputs enable direct connection to external analyzers for detailed vibration diagnostics.
Environmental and Operating Conditions
| Condition | Range |
|---|---|
| Operating Temperature (Standard I/O) | -30°C to +65°C |
| Operating Temperature (Barrier I/O) | 0°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | Up to 95% non-condensing |
This rugged design ensures stable performance in high-temperature environments, including power plants, oil refineries, and offshore platforms.
Physical Dimensions
| Component | Height × Width × Depth | Weight |
|---|---|---|
| Monitor Module (Main Board) | 241.3 × 24.4 × 241.8 mm | 0.91 kg |
| I/O Module (Non-barrier) | 241.3 × 24.4 × 99.1 mm | 0.20 kg |
| I/O Module (Barrier) | 241.3 × 24.4 × 163.1 mm | 0.46 kg |
The 3500/42M-01-02 occupies one full-height front slot in the 3500 rack, with its corresponding I/O module installed in the rear slot.
Intrinsic Safety and Barrier Parameters
| Parameter | Power (PWR) | Signal (SIG) |
|---|---|---|
| Vmax | 26.8 V | 14.05 V |
| Imax | 112.8 mA | 2.82 mA |
| Rmin | 237.6 Ω | 4985 Ω |
For seismic barrier circuits:
- Vmax: 27.25 V
- Imax: 91.8 mA
- Rmin: 297 Ω
These specifications confirm compliance with CSA-NRTL/C and ATEX approvals for hazardous area installations.
Installation and Configuration
Engineers can configure the 3500/42M-01-02 for dual-function operation, allowing simultaneous vibration and position monitoring. Each channel pair supports flexible I/O configurations with internal, external, or barrier termination options.
- Use 3500/42M-02-01 I/O modules for external terminations
- Maintain recommended cable shielding for accurate signal integrity
- Follow safety documentation for Class I, Division 2 environments
Country of Origin, Size & Weight
- Origin: USA
- Approximate Weight: 910 g
- Module Dimensions: 241.3 × 24.4 × 241.8 mm
Ordering Options
- 3500/42M-01-02: Proximitor Seismic Monitor with cNRTLus Hazardous Area Approval
- 3500/42M-02-01: Prox/Seismic I/O Module with external termination (Prox/Accel and Velomitor support)
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 241.3 × 24.4 × 241.8 mm |
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