



Introduction
The Bently Nevada 3500/42 (138708-01) is a compact, high-precision vibration monitoring module designed for the 3500 Series machinery protection system. Written from an engineer’s practical perspective, this module emphasizes reliability, continuous operation, and ease of integration. It monitors critical rotating equipment, providing early alerts to prevent mechanical failures and support predictive maintenance programs.
Technical Specifications
| Parameter | Description |
|---|---|
| Model Number | 3500/42 |
| Part Number | 138708-01 |
| Module Type | Vibration Monitor Module |
| Function | Monitors vibration in rotating machinery; provides configurable alarm/trip outputs |
| Compatibility | Integrates with Bently Nevada 3500 Series racks |
| Signal Inputs | Accepts velocity, acceleration, or displacement transducers |
| Alarm/Trip Outputs | Configurable via system software based on threshold settings |
| Operating Temperature | 0 °C to 70 °C |
| Storage Temperature | –40 °C to 85 °C |
| Dimensions | 241.3 × 24.4 × 163.1 mm (H × W × D) |
| Weight | 0.46 kg |
| Mounting | Standard 19-inch rack compatible with 3500 Series chassis |
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