Bently Nevada 991-25-70-01-01 991 Series 2Wire Thrust Transmitter

Description

The 991-25-70-01-01 991 Thrust Transmitter is a 2-wire, loop-powered device specifically designed to interface with the 3300 NSv proximity probe and its matching extension cable. This sophisticated transmitter conditions the input signal into appropriate engineering units proportional to the shaft’s axial position, providing a reliable 4 to 20 mA output signal for seamless integration with various control systems.

Specifications

• Input: 3300 NSv proximity probe
• Output Signal: 4-20 mA proportional axial displacement (thrust) signal
• Power Requirements: +12 to +35 Vdc input at the transmitter terminal
• Mounting Options: DIN rail or bulkhead mounting
• Environmental Rating: Potted construction allows operation in high humidity environments (up to 100% condensing)

Features

• Integrated Proximitor Sensor: No external units are required for operation, simplifying installation.
• Non-interacting Zero and Span Potentiometers: Facilitates easy adjustments for loop calibration.
• Test Input Pin: Provides quick verification of loop signal output for convenient diagnostics.
• Power-up Inhibit Circuit: Minimizes signal errors caused by line voltage transients, enhancing reliability.
• Not OK/Signal Defeat Circuit: Protects against high outputs or false alarms resulting from faulty proximity probes or loose connections.
• Compact Compatibility: Designed for installation in confined spaces with minimal clearance, ensuring versatility when used with the 3300 NSv proximity probe.