3300/14 | Bently Nevada DC Power Supply Module

Overview

The Bently Nevada 3300/14 DC Power Supply Module delivers stable, regulated power for critical 3300-series vibration monitoring racks.
It supports both low-voltage and high-voltage DC inputs, therefore simplifying integration across diverse industrial power architectures.
Moreover, the module ensures continuous operation of monitoring cards used in machinery protection and condition monitoring systems.
Engineers commonly select this power supply for turbines, compressors, pumps, and motors requiring proven long-term reliability.

Functional Highlights

The module provides regulated transducer excitation, ensuring accurate proximity and vibration signal measurement across all rack slots.
In addition, wide input voltage tolerance reduces dependency on external power conditioning equipment in demanding environments.
Overload protection supports each monitor channel, therefore improving system resilience during abnormal electrical conditions.
The rack-mount design simplifies installation, and maintenance teams benefit from predictable replacement procedures.

Technical Data

Electrical Input

• Low-voltage DC input: 20–34 V DC, up to 5.5 A

• High-voltage DC input: 90–140 V DC, up to 1.5 A

• Fuse rating, low-voltage input: 8 A maximum

• Fuse rating, high-voltage input: 2 A maximum

Electrical Output

• Transducer power output: user-selectable −24 V DC or −18 V DC

• Output regulation: ±2% depending on selected voltage range

• Protection: overload protected at individual monitor boards

• System OK relay: integrated through the Power Input Module

Environmental and Physical

• Operating temperature: 0°C to +65°C

• Storage temperature: −40°C to +85°C

• Relative humidity: up to 95%, non-condensing

• Certifications: CE, CSA/NRTL/C Class I Division 2 Groups A–D

• Dimensions: 5.7 × 20.3 × 33.0 cm

• Weight: 2 kg

Typical Applications

The 3300/14 module supports machinery protection systems for steam and gas turbines in power generation facilities.
For instance, refineries use this power supply to stabilize proximity probe excitation in compressor monitoring racks.
Moreover, it integrates directly into the left-most rack position, next to the system monitor module.
This standardized placement supports consistent wiring practices and faster commissioning activities.

Support & Reliability

Bently Nevada designed the 3300/14 for continuous duty in harsh industrial environments with minimal maintenance intervention.
Therefore, many facilities retain these modules in service for extended lifecycles supported by routine inspection programs.
Spare availability and backward compatibility further reduce lifecycle risk for legacy 3300-series installations.

FAQ

Q1: What input voltages does the Bently Nevada 3300/14 support?
A1: The module accepts either 20–34 V DC low-voltage input or 90–140 V DC high-voltage input.

Q2: Can the transducer supply voltage be adjusted?
A2: Yes, users can select either −24 V DC or −18 V DC transducer excitation.

Q3: Where is the 3300/14 installed within the rack?
A3: It installs in the left-most rack position, adjacent to the system monitor module.

Q4: Is the module suitable for hazardous locations?
A4: Yes, it carries CSA/NRTL/C approval for Class I Division 2 hazardous areas.

Q5: What machinery types typically use this power supply?
A5: Common applications include turbines, compressors, pumps, motors, and generators.