3500/15 133945-01 Bently Nevada DC Power Supply

Hardware Specifications

Bently Nevada Power and Machinery Protection Interface

The 3500/15 DC provides the electrical supply required by the 3500 rack architecture. Therefore, installation should maintain the specified DC input range and provide appropriate upstream protection.

The power supply operates separately from the measurement channels used for eddy-current probes, seismic transducers, and other machinery sensors. Consequently, probe gap-voltage validation, including the commonly used -10 VDC target for Bently Nevada eddy-current systems, belongs to the associated monitor and transducer circuits rather than the 3500/15 DC power input itself.

For rotor dynamics applications, stable rack power helps maintain consistent operation of the monitoring modules that process shaft position, vibration, speed, and related machinery signals. Field wiring should therefore separate DC power conductors from low-level transducer wiring to reduce electrical interference.

Frequently Asked Questions (FAQ)

Q: What DC input voltage does the 3500/15 DC 133945-01 accept?
A: The supplied specification lists an input range of 20 to 30 VDC.

Q: What is the maximum high-voltage DC output rating?
A: The supplied data specifies a high-voltage DC output capability of 2.5 A maximum.

Q: Does the 3500/15 DC directly perform eddy-current probe gap measurement?
A: No. The 3500/15 DC provides rack power. Eddy-current probe excitation, signal conditioning, and gap-voltage measurement are handled by the applicable 3500 monitoring and interface modules.

Field Installation Guidelines

• Verify that the external DC source remains within the specified 20 to 30 VDC input range.
• De-energize the rack and follow site lockout and isolation procedures before installation or removal.
• Install the power supply in the designated 3500 rack position and verify mechanical engagement with the rack connector.
• Keep DC supply wiring physically separated from low-level vibration and eddy-current transducer wiring where practical.
• Route signal cables away from high-current switching conductors and other major electromagnetic interference sources.
• Maintain proper protective grounding and rack bonding according to the applicable 3500 system installation documentation.
• Verify connector seating before energizing the rack.
• After power application, confirm that the rack and installed monitoring modules operate normally before returning the machinery protection system to service.