Description
The Bently Nevada 140734-02 is a DIN-rail compatible Proximitor Mounting Module designed for use within the 3500 Series Machinery Protection System or standalone proximity transducer networks. It serves as a mechanical and electrical interface platform that securely mounts and terminates 3300 XL Proximitor Sensors (such as the 5 mm, 8 mm, and 11 mm variants). This module simplifies control panel wiring, provides reliable grounding pathways, and ensures isolation between high-density sensor channels in critical rotating machinery monitoring applications.
Commercial Availability & Terms
- Condition: New Original (Factory Sealed Surplus)
- Warranty: 12-Month Functional Warranty
- Availability: In Stock
- Lead Time: Ships within 1–2 business days from order confirmation
- Pricing: Indicative only. Price is subject to market conditions and regional compliance requirements. Contact our engineering sales department for a firm, formal quote.
Technical Specifications
The table below outlines the core mechanical, electrical, and environmental parameters for the 140734-02 mounting module.
| Parameter | Value / Specification |
| Model Number | 140734-02 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Compatible Sensors | 3300 XL Proximitor Series (5 mm, 8 mm, 11 mm) |
| Mounting Configuration | 35 mm DIN-rail (Standard or High-profile) |
| Channel Count | Accommodates 1 Proximitor Sensor per module |
| Terminal Connection Type | Screw terminal blocks (Accepts up to 1.5 mm² / 16 AWG wire) |
| Grounding Interface | Integral DIN-rail grounding clip / Earth lug |
| Material | High-impact, flame-retardant polyamide chassis |
| Operating Temperature | −40 to +85 °C |
| Storage Temperature | −40 to +100 °C |
| Relative Humidity | 95% non-condensing maximum |
| Hazardous Area Approvals | Class I, Div 2 / Zone 2 compatible (Verify exact regional certifications with OEM datasheet) |
Hardware Architecture and Field Integration
In large-scale industrial vibration monitoring setups, the 140734-02 mounting module provides the structural rigidity and electrical shielding required to maintain signal integrity between the probe tip and the monitor rack.
Signal Isolation and Loop Integrity
The module isolates the Proximitor housing from the common backplate metalwork of the enclosure unless explicitly tied to the system ground. This architecture prevents common-mode noise and ground loop interference from corrupting the low-voltage AC/DC signals (−24 V DC nominal power, with dynamic output signals typically scaled at 7.87 V/mm or 3.94 V/mm).
Terminal Pinouts and Field Wiring
The integrated terminal blocks feature dedicated compression screws designed to resist degradation from continuous structural vibration. The typical wiring configuration bridges the Proximitor’s three-wire system:
- VTG / −24 V: Main loop supply voltage input from the 3500 rack or external barrier.
- OUT / SIG: Dynamic voltage output reflecting shaft position or vibration amplitude.
- COM / GND: Common reference signal return line.
Real-World Constraints and Installation Best Practices
- DIN-Rail Integrity: Ensure the 35 mm DIN-rail is securely anchored to the sub-panel and bonded to the plant’s instrument ground system. Loose rails introduce secondary mechanical frequencies that can reflect as false high-frequency vibration artifacts on the proximity sensor output.
- Proximitor Positioning: Tighten the Proximitor casing screws onto the 140734-02 mounting plate to the torque limits specified by Bently Nevada. Overtightening can fracture the polymer mounting tabs, while undertightening compromises the grounding contact between the sensor chassis and the module base.
- Cross-Talk Prevention: Maintain physical separation between the low-voltage signal cables routed out of this module and high-voltage motor power conductors running through the same termination panel.
Frequently Asked Questions
What is the specific difference between the 140734-01 and the 140734-02 part numbers?
The variation in the dash numbers usually indicates the specific mounting footprint, multi-channel capabilities, or the inclusion of specific grounding configurations. The 140734-02 is explicitly tailored for standardized 35 mm DIN-rail snap-on integration for singular sensor housings. Verify your exact physical cabinet arrangement with the OEM engineering manual before ordering.
Does this mounting module contain active electronics that require separate power?
No. The 140734-02 is a passive structural and termination interface module. It does not possess an internal power supply or signal processing circuitry. Power is passed through the terminal links directly to the 3300 XL Proximitor Sensor from the monitoring system.
Can I install this module in a Zone 2 hazardous environment?
Yes, provided it is housed inside an appropriately rated (minimum IP54 or NEMA 4X) protective enclosure that meets the requirements of the local hazardous area certification. Verify the full assembly compliance guidelines with the manufacturer’s installation data sheet.
