The Bently Nevada 990-16-XX-01-CN MOD:106M1675-01, also cataloged as the 990 Vibration Transmitter, operates as a loop-powered signal conditioning interface converting vibration transducer input into a proportional 4-20 mA current output for continuous monitoring within Bently Nevada 990/991 transmitter architectures. The device processes displacement or velocity-related vibration signals and transmits conditioned loop current through a 2-wire configuration, with internal current limiting at approximately 23 mA under fault or over-range conditions.

Hardware Specifications

Eddy Current Scaling and Loop Signal Conditioning Behavior

The transmitter processes vibration input through internal signal conversion stages that map mechanical displacement variation into a proportional loop current output. Signal scaling is referenced against eddy-current probe linearization curves, maintaining stable conversion within calibrated gap voltage regions. Loop integrity depends on controlled resistance loading, ensuring stable 4-20 mA transmission across extended cable runs while maintaining immunity to noise-induced current drift in DIN rail mounted control environments.

Ordering info

• 1 x 990-16-XX-01-CN vibration transmitter unit

• 1 x 35 mm DIN rail mounting clip assembly

• 1 x factory certification package (CSA / ATEX / ABS approval set)

• 1 x terminal connection interface block

Field Installation Guidelines

Power Loop Connection

• Supply 12 to 35 VDC loop power only

• Verify polarity before energizing 2-wire circuit

Mounting Requirements

• Install on standard 35 mm DIN rail only

• Ensure mechanical lock engagement of clip system

Wiring Practices

• Maintain shielded twisted pair for loop signal

• Avoid parallel routing with high voltage conductors

Configuration Checks

• Confirm loop resistance does not exceed 1000 ohm

• Validate output stability at 4-20 mA range

Frequently Structured Technical Queries

• Is the transmitter loop powered?
  Yes, it operates on a 2-wire loop powered configuration using 12 to 35 VDC supply.

• What is the maximum loop resistance?
  Maximum allowable loop resistance is 1000 ohm including cable contribution.

• What happens under fault condition?
  Output current is limited typically to 23 mA for over-range or fault indication.

• What mounting system is used?
  Standard 35 mm DIN rail clip mounting system is implemented.

• Does it support hazardous area certification?
  Yes, CSA Division 2, ATEX Zone 0 and Zone 2, and ABS maritime approval are included.

• What type of output signal is used?
  It provides a linear 4-20 mA analog current output proportional to vibration input.

• Can cable length be extended?
  Yes, within loop resistance limits up to 1000 ohm total system resistance.

• Is it compatible with proximity probe systems?
  It is designed to interface with Bently Nevada vibration sensing architectures including proximity-based inputs.