Bently Nevada 3500/50 133450-01 Tachometer I/O Module

Bently Nevada 3500/50 133450-01 Tachometer I/O Module

The Bently Nevada 3500/50 133450-01, also cataloged as the 3500/50 Tachometer I/O Module, operates as a dedicated hardware component for shaft rotational speed acquisition, rotor acceleration monitoring, and Keyphasor signal distribution within machinery protection and TSI networks.

Hardware Specifications

Rotor Dynamics and Eddy-Current Probe Scaling

Configured for continuous rotative speed tracking, the Bently Nevada 3500/50 133450-01 processes electrical inputs derived from proximity probes or magnetic pickups. The internal circuitry executes strict eddy-current probe scaling and pulse conditioning to determine accurate shaft rotational speed, rotor acceleration, and rotor direction metrics. During operation, gap voltage validation and signal threshold detection target nominal baselines to ensure proper transducer response relative to the rotating shaft keyway or gear teeth. Furthermore, the module supplies conditioned Keyphasor signals directly to the backplane bus, eliminating the requirement for a separate dedicated Keyphasor module within the rack enclosure.

Frequently Asked Questions

Q: What transducer types are supported by the 3500/50 133450-01 module inputs?

A: The 2-channel module accepts input signals directly from proximity probes or magnetic pickups to determine shaft rotative speed, rotor acceleration, or rotor direction.

Q: How does the peak hold feature operate on this module?

A: The peak hold feature stores the highest speed, highest reverse speed, or the number of reverse rotations achieved by the machine, and these stored values can be reset manually via software.

Field Installation Guidelines

Mounting and Grounding: Install the module exclusively within designated slots of a standard 3500 rack enclosure. Ensure the rear I/O module is firmly secured and torqued to prevent backplane bus misalignment. Connect the earth ground stud directly to the plant grounding grid using low-impedance copper braided wire to mitigate high-frequency noise interference.

Signal Wiring: Route all pickup and probe signal cables separately from high-voltage power conduits and variable frequency drive outputs. Utilize shielded twisted-pair cabling, terminating the shield strictly at the system rack grounding bar to maintain electromagnetic compatibility.