Bently Nevada 3500/50-01-00-01 133388-02 Tachometer Module Original

Frequently Asked Questions (FAQ)

What types of transducers are compatible with the 3500/50 Tachometer Module?
It supports 1 to 2 proximity probe transducers or magnetic pickups. Magnetic pickups are not recommended for reverse rotation or zero speed detection due to potential false indications.

What is the maximum speed the module can monitor?
The 3500/50 Tachometer Module can monitor shaft speeds up to 99,999 rpm with an input frequency limit of 20 kHz.

Does this module provide protection features such as overspeed control?
No, this module is not intended for speed control or overspeed protection. It is not designed with the protective redundancy or reaction speed required for such safety-critical functions.

Can this module be used to replace a Keyphasor module in the rack?
Yes, it can be configured to supply conditioned Keyphasor signals to the 3500 rack backplane, removing the need for a separate Keyphasor module.

What are the output signal capabilities of the module?
It provides 4–20 mA analog outputs per channel, proportional to full-scale speed or acceleration values. Outputs are unaffected by short circuits.

Is it possible to adjust alarm setpoints and delays for each channel?
Yes, Alarm 1 and Alarm 2 setpoints and delays are fully programmable using the configuration software.

How accurate is the speed measurement?
Accuracy varies by speed range—within ±0.1 rpm under 100 rpm, ±1 rpm from 100 to 10,000 rpm, and ±0.01% for speeds above 10,000 rpm.

What are the module’s dimensions and weight?
The monitor module measures 241.3 x 24.4 x 241.8 mm, and with a barrier I/O module, the total weight is approximately 0.91 kg.