The Bently Nevada 3300/12-01-20-00, also cataloged as the 3300/12 power supply module, operates as a regulated DC conversion unit providing backplane excitation and control voltage distribution within the Bently Nevada 3300 monitoring rack architecture. The module converts 95/125 VAC input into a regulated 28 VDC output with a 5 A current capacity, supplying downstream monitoring and protection modules through rack-level distribution rails. Output regulation behavior is governed by internal switching and protection circuitry designed to maintain stable backplane voltage under variable load conditions.

Hardware Specifications

Rack Power Distribution and Voltage Regulation Behavior

The module performs AC-to-DC conversion using internal switching regulation with output stabilization targeted at 28 VDC bus voltage. Backplane distribution is designed to maintain consistent supply rails across 3300 series monitoring modules. Load variation compensation is implemented through internal current regulation limiting, ensuring controlled response under transient rack insertion or module hot-swap conditions. Voltage stability is maintained within defined tolerance bands to support continuous signal conditioning operations.

Ordering info

• 1 x 3300/12-01-20-00 power supply module

• 1 x integrated rack power interface connector assembly

• 1 x mounting and locking hardware set for 3300 series rack

• 1 x terminal identification label set

Field Installation Guidelines

Power Input Connection

• Connect only to 95–125 VAC rated supply source

• Verify correct frequency selection (50 / 60 Hz)

Rack Integration

• Install only into compatible Bently Nevada 3300 rack chassis

• Ensure full backplane engagement before energizing system

Grounding Requirements

• Maintain dedicated rack earth grounding path

• Avoid shared ground loops with high noise equipment

Operational Checks

• Verify 28 VDC output stability after startup

• Confirm no overcurrent condition on 5 A rail

Frequently Structured Technical Queries

• Is the module hot-swappable?
  Replacement should be performed with rack power isolated; backplane energization during insertion is not recommended.

• What is the output voltage level?
  The module provides a regulated 28 VDC output to the rack backplane distribution system.

• What input range is supported?
  It supports 95 to 125 VAC input at 50 / 60 Hz frequency.

• What happens under overload conditions?
  Internal current limiting restricts output to 5 A maximum to protect downstream modules.

• Can it operate in redundant configuration?
  Redundant rack setups require matched power supply modules and synchronized load sharing design.

• Does it require external cooling?
  Cooling is achieved via rack airflow; no external cooling module is specified.

• What is the role in the 3300 system?
  It provides centralized DC power conversion for all monitoring and protection modules in the rack.

• Why is it discontinued?
  Product lifecycle status is manufacturer-defined; functional replacement depends on system revision compatibility.