Bently Nevada 991-06-XX Thrust Transmitter

Description:

The 991-06-XX thrust transmitter is a 2-wire, loop-powered device designed to interface with a 3300 NSv proximity probe and its matching extension cable. It converts the signal into a 4-20 mA output that is proportional to the shaft’s axial position.

Features:

• Integrated Proximitor Sensor: Operates without the need for an external unit.
• Dynamic Signal Output: Provides a non-isolated dynamic vibration and gap voltage signal for diagnostics.
• Non-Interacting Zero and Span Potentiometers: Allows for loop adjustment.
• Test Input Pin: Enables quick verification of loop signal output using a variable DC voltage source.
• Power-Up Inhibit Circuit: Prevents signal errors caused by line voltage transients.
• Not OK/Signal Defeat Circuit: Avoids high outputs or false alarms due to a faulty proximity probe or loose connection.
• Mounting Options: Offers choices of DIN-rail clips or bulkhead mounting screws.
• Potted Construction: Suitable for environments with high humidity (up to 100% condensing).
• Compatibility: Works with the 3300 NSv proximity probe, making it suitable for installation in small areas with minimal clearance.

Specifications:

• Measurement Range: Full-scale range of 0.6 mm (0.024 inches).
• Output Signal: 4-20 mA.
• Power Supply: 12 to 36 VDC.
• Operating Temperature: -40 to 85°C.
• Humidity: 0 to 100% RH (non-condensing).

Applications:

• Centrifugal Air Compressors: Monitors thrust bearing wear and detects imbalances.
• Small Pumps, Motors, or Fans: Provides a simple 4-20 mA proportional axial displacement signal for machinery control systems.