Bently Nevada 3300/20-13-03-01-00-00

3300 Series Two-Channel Thrust Position Monitor

The 3300/20-13-03-01-00-00 provides continuous thrust position monitoring for two independent transducer inputs. This module measures axial shaft displacement in rotating machinery like turbines and compressors. It processes each proximity probe signal and compares it against configurable alarm thresholds. The device then activates the appropriate relay outputs when any channel exceeds its setpoint.

Key Technical Specifications

Parameter	Specification
Model	3300/20-13-03-01-00-00
Series	3300 Series
Function	Dual-channel thrust position monitor
Input Type	Accepts two proximity probe signals
Power Supply	Requires +24 Vdc at 180 mA nominal
Output Relays	Includes two alarm relays and one danger relay
Measurement Range	Spans from -24 Vdc to 0 Vdc input
Frequency Response	Covers a range from DC to 10.0 kHz
Input Impedance	Provides 100 kΩ impedance per channel
Alarm Setpoints	Individually configurable per channel
Time Delay	Adjustable from 0.1 to 10.0 seconds
Operating Temperature	Functions from -20°C to +65°C
Storage Temperature	Withstands -40°C to +85°C
Dimensions	Measures 241.3 mm x 25.4 mm x 152.4 mm
Weight	Weighs approximately 1.3 kg
Mounting	Fits standard 19-inch rack enclosures
Termination	Uses pluggable screw terminal blocks
LED Indicators	Displays OK, ALERT, and DANGER per channel

Thrust Position Monitoring and Protection

This monitor continuously evaluates each proximity probe signal for axial displacement. It then triggers the alarm relay when a channel reaches the first threshold. Subsequently, the danger relay activates if the displacement reaches the critical limit. Each channel operates independently, so a fault on one does not affect the other. The device also supplies a buffered output for external monitoring systems.

Installation and Configuration

Mount the 3300/20-13-03-01-00-00 securely into an available rack slot first. Next, connect the proximity probe cables to the designated input terminals. After that, apply +24 Vdc power and verify the OK LED illuminates. You can then adjust the alarm setpoints using the front-panel potentiometers. Finally, set the time delay to prevent false trips during transient conditions.

Maintenance and Operational Reliability

This module retains all configuration parameters in non-volatile memory. Therefore, you will not lose your calibration values after a power cycle. We recommend you perform periodic verification of both input channels. You should also inspect the terminal connections for any signs of loosening or corrosion.