The Bentley Bently Nevada 3500/61 163179-02 tachometer module is a 2-channel module, 3500/61 163179-02 it accepts input from the approach probe or magnetic sensor (unless otherwise stated) to determine shaft speed, rotor acceleration, or rotor direction, These measurements are compared to user-programmable alert set points and alerts are generated when these set points are violated.

The Bentley Bently Nevada 3500/61 163179-02 tachometer module is programmed using 3500 rack configuration software and can be configured with four different options: 1. Speed monitoring, set point alarm and speed belt alarm. 2. Speed monitoring, set point alarm and zero speed notification. 3. Speed monitoring, set point alarm and rotor acceleration alarm. 4. Speed monitoring, set point alarm and reverse notification.

The Bentley Bently Nevada 3500/61 163179-02 tachometer module can be configured to provide tuned Keyphasor signals to the backplane of the 3500 rack for use by other monitors, eliminating the need for a separate Keyphasor module in the rack. The Bentley Bently Nevada 3500/61 163179-02 tachometer module also features a peak-hold function that stores the highest speed achieved by the machine, the highest reverse speed, or the number of reverse spins (depending on the channel type selected). These peaks can be reset by the user.