Products Description

Model 125680-01 from Bently Nevada functions as a four-channel Proximitor input/output card, engineered to work alongside the 3500/40M Proximitor Monitor unit. Mounted on the back side of the 3500 series rack, this component features built-in field wiring terminals, enabling connection of as many as four separate Bently Nevada proximity probe signal lines to its matching monitor module.
This hardware unit delivers measurement capacity critical to rotating equipment protection, covering parameters including radial vibration, axial thrust displacement, rotor eccentricity, differential thermal expansion and REBAM signals; measurable metrics vary based on the channel setup programmed within the 3500/40M monitor. Classified as a regular non-isolation I/O card, the 125680-01 omits integrated intrinsically safe barrier circuitry. It cannot operate independently as a monitoring device, and requires matching 3500/40M monitor hardware for full functional deployment.
Key Features
- Designed for the Bently Nevada 3500/40M Proximitor Monitor
- Accepts connections from one to four proximity transducer channels
- Uses internal field wiring terminations
- Supports radial vibration and shaft-position monitoring applications
- Occupies one full-height rear slot in the 3500 rack
- Standard I/O input impedance of 10 kΩ

Technical Specifications
| Parameter | Specification |
|---|---|
| Part number | 125680-01 |
| Product type | Proximitor I/O module |
| Compatible monitor | Bently Nevada 3500/40M Proximitor Monitor |
| Input capacity | One to four proximity transducer signals |
| Termination type | Internal termination |
| Internal safety barriers | No |
| Standard I/O input impedance | 10 kΩ |
| Rack position | Rear of the 3500 rack |
| Rack space | One full-height rear slot |
| Dimensions | 241.3 × 24.4 × 99.1 mm |
| Weight | Approximately 0.20 kg |
| Operating temperature | −30°C to +65°C |
| Storage temperature | −40°C to +85°C |
| Humidity | Up to 95%, non-condensing |
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FAQ
1. What is the Bently Nevada 125680-01?
2. Is the 125680-01 the main 3500/40M monitor?
3. How many transducer signals does the module support?
4. Does the 125680-01 include internal safety barriers?
5. Does it require an external termination block?
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