The Bently Nevada 3300/12-01-01, also cataloged as the 3300/12 AC Power Supply Module, operates as a rack-mounted hardware component for regulated power distribution within the 3300 Series machinery protection system. This module converts incoming alternating current mains voltage into the direct current rails required by up to 12 monitor modules and associated transducers installed in the instrument rack.

Ordering Code and Variant Identification

The complete ordering code 3300/12-01-01 incorporates specific modular options defined by Bently Nevada manufacturer documentation:

• Base Model (3300/12): Designates the AC power supply hardware platform for the 3300 monitoring system.
• Input Voltage Option (-01): Configured for 95 to 125 Vac, single phase, 50 to 60 Hz operation (field-changeable via internal jumper and fuse selection).
• Agency Approval Option (-01): Indicates specific regional or hazardous area compliance configurations such as CSA/NRTL/C or ATEX certifications.

Hardware Specifications

Power Distribution and Noise Mitigation

The Bently Nevada 3300/12 power supply architecture incorporates an integrated line noise filter as a standard feature to suppress high-frequency line disturbances. It delivers stabilized DC power across the internal rack backplane buses to support sensitive vibration monitoring cards, proximitor sensor drivers, and signal processing circuits. The integrated Power Input Module (PIM) houses the system OK relay—a single-pole, double-throw (SPDT) hermetically sealed relay wired in a normally energized state to annunciate primary power loss, transducer failures, or rack fault conditions.

Ordering Information and Package Contents

• 1 x Bently Nevada 3300/12-01-01 AC Power Supply Module
• 1 x Power Input Module (PIM) Assembly

Installation and Electrical Integration

• Verify that incoming primary mains voltage matches the internal jumper configuration (95 to 125 Vac) before energizing the module.
• Ensure the 3300 instrument rack chassis is securely connected to a low-impedance earth ground to maintain system noise immunity and safety compliance.
• The module is physically keyed to install exclusively in position 1 (the left-most slot directly adjacent to the System Monitor) of a 3300 instrument rack.
• Power down the instrument rack completely before inserting or removing the power supply module to prevent backplane bus interruption or data corruption on active monitor cards.
• Inspect all terminal block screw connections on the rear Power Input Module (PIM) and torque to manufacturer-recommended limits to prevent loose connections under machinery vibration.

Frequently Asked Questions

• Q: What supply voltage does this module require? A: It requires a single-phase AC input of 95 to 125 Vac at 50 to 60 Hz.
• Q: What is the maximum current consumption of the unit? A: The module draws a maximum current of 1.0 A under 95 to 125 Vac input operating conditions.
• Q: How many monitor modules can a single 3300/12 power supply support?A: It is engineered to supply regulated power for up to 12 monitor modules and their associated transducers within one rack.
• Q: Where must this power supply be installed in the rack?A: It must be installed in position 1, which is the left-most slot of a 3300 instrument rack.
• Q: What type of fuse is specified for the 95-125 Vac input option?A: It utilizes a 1.5 A slow-blow fuse.
• Q: What is the function of the OK relay located in the Power Input Module?A: It provides a normally energized, hermetically sealed SPDT contact output to annunciate primary power loss, transducer faults, or internal monitoring failures.
• Q: What are the operating temperature limits for this power supply?A: The module is rated for operation from 0 deg C to +65 deg C (+32 deg F to +150 deg F).
• Q: Can this AC power supply be hot-swapped in an active rack? A: No. Primary rack power must be disconnected before module extraction or insertion to protect internal circuitry and prevent system trip disruptions.

Related Models and Compatibility

• Bently Nevada 3300 Instrument Rack
• Bently Nevada 3300 System Monitor Module
• Bently Nevada 3300/16 Dual Radial Vibration Monitor
• Bently Nevada 3300/20 Dual Thrust Position Monitor
• Bently Nevada 3300/65 Dual Vibration Monitor