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Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 330980-71-CN |
| Product Family | 3300 XL NSv Proximitor Sensor |
| System Length | 7.0 m (23.0 ft) |
| Mounting Option | DIN rail |
| Sensor Input | One 3300 RAM or 3300 NSv proximity probe with extension cable |
| Supply Voltage, No Barrier | -17.5 to -26 VDC |
| Supply Voltage, With Barrier | -23 to -26 VDC |
| Maximum Supply Current | 12 mA |
| Nominal Scale Factor | 7.87 V/mm (200 mV/mil) |
| Linear Range | Approximately 1.5 mm (60 mils), depending on system configuration |
| Recommended Probe Gap | Approximately 1.0 mm (40 mils) |
| Output Resistance | 50 Ω |
| Housing Material | A380 aluminum |
| Mounting | High-density DIN rail |
| Operating Temperature | -35 to +85 °C* |
| Storage Temperature | -51 to +105 °C |
| Agency Approval Option | CN — country-specific approvals |
| Application | Radial vibration, radial position, axial position, Keyphasor/tachometer |
*Published third-party listings for the exact 330980-71-CN report -35 to +85 °C, while other 3300 XL NSv documentation/listings show broader environmental limits for certain configurations. Verify the applicable Bently Nevada datasheet and approval documentation for the exact CN configuration before using the sensor at environmental extremes.
The 3300 XL NSv system is specifically intended for machinery where conventional 5 mm or 8 mm transducer systems are difficult to install because of restricted counterbore, side-view, or rear-view access. It is also designed for smaller shaft and target geometries.
Product Introduction
The Bently Nevada 330980-71-CN is a 3300 XL NSv Proximitor Sensor used as the signal-conditioning component in a matched non-contact proximity transducer system. The 71 configuration provides a 7.0 m (23.0 ft) electrical system length and DIN-rail mounting. The CN suffix identifies the country-specific approval configuration.
This Proximitor accepts a compatible 3300 RAM or 3300 NSv proximity probe and extension cable. The complete NSv system is used for radial vibration, radial position, axial position, tachometer/zero-speed, and Keyphasor measurements, particularly where installation space is limited.
330980-71-CN
330980-71-CN
Installation & Configuration Guide
Stage 1 — Pre-Installation Preparation
Estimated time: 15–20 minutes
- Confirm the replacement marking is exactly 330980-71-CN.
- Verify that the existing installation uses a 7.0 m (23.0 ft) electrical system length.
- Confirm the cabinet or enclosure provides a suitable DIN-rail mounting location.
- Verify that the associated probe and extension cable are compatible with the 3300 XL NSv system.
- Record existing terminal wiring and take photographs before disconnection.
- Back up the applicable monitoring-system configuration and record the existing vibration/position baseline.
- Apply LOTO to the associated equipment and monitoring circuit as required.
- Prepare an ESD strap, multimeter, insulated hand tools, labels, and the applicable Bently Nevada installation documentation.
⚠️ Do not substitute the sensor solely because the housing dimensions appear compatible. The electrical system length and probe/cable combination are part of the transducer system.
Stage 2 — Removing the Existing Proximitor
Estimated time: 10–15 minutes
- Confirm the circuit is safely de-energized.
- Identify and label each field-wire connection.
- Disconnect the probe/extension-cable wiring from the existing Proximitor.
- Disconnect the power and output connections.
- Release the existing sensor from the DIN rail.
- Inspect the wiring, terminal strips, cable insulation, and grounding arrangement.
- Keep the removed unit available for part-number and wiring verification.
⚠️ Avoid pulling directly on the probe cable. Damage to the cable or connector can change the electrical characteristics of the transducer loop.
Stage 3 — Installing the 330980-71-CN
Estimated time: 15–20 minutes
- Mount the 330980-71-CN securely on the DIN rail.
- Verify that the sensor is positioned with sufficient clearance for wiring and service access.
- Connect the compatible probe/extension-cable loop according to the applicable wiring diagram.
- Connect the required negative DC supply within the specified range.
- Verify polarity and terminal assignments with a multimeter before energization.
- Confirm the probe, extension cable, and Proximitor together provide the required 7.0 m system length.
- Tighten terminals to the manufacturer’s specified values.
⚠️ The 330980 requires a negative DC supply. For installations without barriers, the specified range is -17.5 to -26 VDC; installations using barriers require -23 to -26 VDC. Operation at a voltage more positive than approximately -23.5 VDC can reduce linear range.
Stage 4 — Power-On & Testing
Estimated time: 20–30 minutes
- Remove LOTO according to the approved plant procedure.
- Energize the Proximitor circuit.
- Measure the supply voltage at the appropriate terminals.
- Verify the sensor output and DC bias condition.
- Check the probe gap against the applicable installation specification.
- Start the machine under the approved commissioning procedure.
- Compare radial vibration, position, or Keyphasor readings against the recorded baseline.
- Confirm that the monitoring system reports no open-loop, excessive-gap, or signal-quality fault.
- Record the replacement model, serial number, system length, measured gap, and commissioning results.
⚠️ Do not change the probe gap while the machine is operating unless the plant procedure specifically permits it. For machinery-protection applications, commissioning should follow the site’s approved instrumentation and API 670 practices.
FAQ
Q1. What is the Bently Nevada 330980-71-CN?
It is a 3300 XL NSv Proximitor Sensor, the signal-conditioning component used with a compatible NSv proximity probe and extension cable. It is not the proximity probe itself.
Q2. What does the “71” configuration mean?
The 71 option specifies a 7.0 m (23.0 ft) system length with DIN-rail mounting. The system length applies to the matched probe, extension cable, and Proximitor combination rather than simply the physical length of the Proximitor housing.
Q3. What does the “CN” suffix mean?
CN identifies a country-specific agency-approval configuration. The exact regulatory markings and permitted installation locations should be verified against the current Bently Nevada CN approval documentation for the destination country.
Q4. Which probes are compatible with 330980-71-CN?
The sensor accepts one compatible 3300 RAM or 3300 NSv proximity probe and extension cable. The complete electrical system length must match the Proximitor configuration.
Q5. Can 330980-71-CN replace a standard 3300 XL 8 mm Proximitor?
Not automatically. Although the NSv system performs similar proximity measurement functions, the NSv Proximitor is designed for 3300 RAM/NSv probes and has specific system-length and probe compatibility requirements. Verify the complete transducer chain before substitution.
Q6. Does the 330980-71-CN require programming?
It is primarily an analog signal-conditioning component rather than a PLC-style programmable module. Correct installation depends on the matched probe/cable system, supply voltage, mounting configuration, and probe gap rather than downloading a user program.
Q7. What should be verified before purchasing a replacement?
Verify the complete part number 330980-71-CN, DIN mounting requirement, 7.0 m system length, compatible NSv/RAM probe, extension cable, required agency approval, negative DC supply, and the environmental conditions at the installation point. For machinery-protection service, confirm the replacement against the OEM datasheet and the site’s approved protection-system design before installation.
