Bently Nevada 3500/50M 286566-02 Tachometer Module

Bently Nevada 3500/50M 286566-02 Tachometer Module

The Bently Nevada 3500/50M 286566-02, also cataloged as the 3500/50M Tachometer Module, operates as a dedicated hardware component for shaft speed, acceleration, and rotation direction measurement within Bently Nevada 3500 Monitoring System platforms. The module accepts proximity probe or magnetic pickup inputs and processes tachometer signals for alarm generation and Keyphasor signal distribution.

Hardware Specifications

Rotor Speed Measurement and Keyphasor Signal Processing

The 3500/50M Tachometer Module processes input signals from proximity probes or magnetic pickups to determine shaft rotational speed, rotor acceleration, and rotation direction. The module compares measured values against user-programmable alarm setpoints configured through the 3500 Rack Configuration Software.

The module supports multiple configuration modes, including speed monitoring with setpoint alarming, speed band alarming, zero speed notification, rotor acceleration alarming, and reverse rotation notification.

The 3500/50M module can provide conditioned Keyphasor signals to the 3500 rack backplane for use by other monitoring modules, eliminating the requirement for a separate Keyphasor module in compatible configurations.

The peak hold function stores maximum recorded speed, maximum reverse speed, or reverse rotation count values. Stored peak values can be reset through the monitoring system configuration interface.

Frequently Asked Questions

Q: How many input channels are available on the 3500/50M 286566-02 module?
A: The module provides two input channels for tachometer signal processing.

Q: What input devices can be connected to the 3500/50M module?
A: The module accepts input signals from proximity probes or magnetic pickups for rotational speed measurement.

Q: Can the module provide Keyphasor signals to other rack modules?
A: Yes. The module can supply conditioned Keyphasor signals through the 3500 rack backplane for use by other compatible monitors.

Field Installation Guidelines

• Install the module in an approved slot position within the Bently Nevada 3500 rack configuration.
• Verify input wiring polarity and signal range compatibility before connecting proximity probes or magnetic pickups.
• Maintain proper separation between tachometer signal wiring and high-current power cables.
• Configure alarm thresholds and measurement modes using the 3500 Rack Configuration Software before operation.
• Confirm speed measurement, alarm functions, and Keyphasor signal output during commissioning.
• Apply standard industrial grounding and shielding practices for signal cable installation.