Bently Nevada 1800/20-12-90-02-00 Vibration Monitoring Module

Shaft Vibration Control with the 1800/20-12-90-02-00

The 1800/20-12-90-02-00 monitors shaft vibration and displacement in rotating machinery. This module conditions eddy current probe signals and delivers calibrated outputs. Reliability engineers therefore apply it to turbines, compressors, and large motors. Its full-width board fits standard 1800 Series rack positions without extra mounting hardware.

Detailed Technical Parameters

Channel accuracy defines the 1800/20-12-90-02-00, because the oscillator circuit drives the probe coil at a stable frequency. The demodulator stage then extracts displacement values from the returned signal. Meanwhile, front-panel indicators reveal channel status during walkdown checks. Review the essential specifications in the table below.

Parameter	Specification
Function	Vibration and displacement monitoring for 1800 Series racks
Input signals	Eddy current proximity probe inputs
Output signal	Calibrated displacement and vibration voltage
Dimensions (W × H × D)	40 × 220 × 250 mm
Weight	Approximately 1.2 kg
Interface	Rack backplane connector plus front probe terminals
Component count	Oscillator stage plus demodulator board
Energy storage	Local decoupling capacitor array
Operating temperature	0 °C to 65 °C

Integration into Monitoring Racks

The fits into a standard rack slot and connects through the backplane connector. Commissioning engineers verify probe gaps and alarm setpoints during startup procedures. Consequently, protection channels return to service quickly after module replacement. The board samples probe signals within a fixed interval. Furthermore, the isolated front end resists interference from nearby power cables and drives.

Why Plants Choose This Module

Many power stations still operate 1800 Series racks for their proven machinery protection. Hence, the serves as a dependable spare for keeping vibration channels online. Its standardized board format simplifies stock management across multiple sites. In addition, the robust oscillator maintains accurate readings under electrical noise. This module keeps shaft vibration measurement precise and plant operations on schedule.