Description
BENTLY 3500/45 is a 4-channel Position Monitor module for Bently Nevada 3500 series machinery protection systems.
Product Overview
The 3500/45 accepts inputs from proximity transducers, RPTs, DC/AC LVDTs, and rotary potentiometers to monitor axial position, differential expansion, case expansion, and valve position.
Each channel pair can be independently programmed for different position monitoring functions with user-defined alarm setpoints.

BENTLY 3500/45
Key Specifications
| Parameter | Details |
|---|---|
| Channels | 4 (programmable in pairs) |
| Input Types | Proximitor, RPT, DC LVDT, AC LVDT, Rotary Potentiometer |
| Power Consumption | 10.5 W typical |
| Operating Temp | -30°C to +65°C |
| Dimensions | 241.3 x 24.4 x 241.8 mm |
| Weight | 0.91 kg (monitor), 0.20 kg (I/O module) |
| Measured Variables | Thrust position, differential expansion, case expansion, valve position |
| Alarm Relays | NOT OK, Alert, Danger per channel |
| Update Rate | 100 ms or less |
The datasheet details multiple expansion ramp configurations and transducer sensitivity settings.
Origin
Manufactured by Bently Nevada (Baker Hughes) in USA.
Applications
- Turbine axial/thrust position monitoring.
- Steam turbine differential expansion protection.
- Valve position tracking in control systems.
- Case expansion measurement for machinery protection.
Usage Method
- Install in full-height slot of 3500 rack with rear I/O module.
- Connect position transducers to I/O module terminals per channel.
- Configure channel functions (thrust, expansion, valve) via 3500 Rack Configuration Software.
- Set alarm thresholds, ramp rates, and NOT OK voting.
- Verify OK LED and test alarm relay operation.
Technical Notes
Supports complementary differential expansion (CIDE) and multiple ramp profiles for complex turbine applications.
Similar Models
| Model | Description |
|---|---|
| 3500/42M | Proximitor/Seismic interface module |
| 3500/15 | Power supply module |
| 3500/22M | Buffer/barrier module |
| 3500/05 | Servo display module |
| 3500/46M | Hydro gate position monitor |
At Newplcdcs, we specialize in providing high-quality spare parts for Distributed Control Systems (DCS) and Programmable Logic Controllers (PLC). Our comprehensive product portfolio includes parts from approximately 20 leading brands, such as ABB, Bently Nevada, Honeywell, GE, Yokogawa, Allen Bradley, Foxboro, Ovation, Hima, Emerson, Triconex, Woodward, ICS Triplex, Bachmann, and Schneider. This focused expertise allows us to offer in-depth solutions in the automation sector, setting us apart from many competitors and ensuring we deliver the most advanced and reliable products to our clients.
Contact Information
- Email: [email protected]
- TEL: +86 13822101417
Frequently Asked Questions
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