Product Description
Product Details
| Manufacturer |
Bently Nevada |
| Series |
3500/50 |
| Model/Part Number |
3500/50-01-00 |
| Model Type |
Tachometer Module |
Function
The 3500/50 Tachometer Module is a two-channel module designed to monitor:
-
Speed: Measures shaft rotative speed.
-
Acceleration: Tracks rotor acceleration.
-
Direction: Detects rotor direction.
The module accepts input from proximity probes or magnetic pickups, processes the signals, and compares measurements to user-programmable alarm setpoints. It triggers alarms when thresholds are exceeded, ensuring reliable machinery protection.
Specifications
Inputs
| Parameter |
Details |
| Signal Type |
Accepts up to two transducer signals from proximity probes or magnetic pickups. |
Outputs
| Front Panel LEDs |
Function |
| OK LED |
Indicates the module is functioning properly. |
| TX/RX LED |
Flashes to indicate communication with other modules in the 3500 rack. |
| Bypass LED |
Illuminates when the module is in Bypass Mode. |
Signal Conditioning
| Parameter |
Details |
| Speed Input |
Supports 1 to 255 events/revolution for rotor acceleration and zero speed. |
| Full-Scale Range |
0.0039 to 255 events/revolution; maximum 99,999 rpm. |
| Frequency Range |
- Proximity Transducers: Min 0.0167 Hz (1 rpm for 1 event/revolution).
- Passive Magnetic Pickups: Min 3.3 Hz. |
| Max Input Frequency |
20 kHz |
| Accuracy |
- Less than 100 rpm: ±0.1 rpm.
- 100 to 10,000 rpm: ±1 rpm.
- 10,000 to 99,999 rpm: ±0.01% of true shaft speed. |
Physical Specifications
| Component |
Dimensions (H x W x D) |
Weight |
| Monitor Module |
241.3 mm x 24.4 mm x 241.8 mm |
0.82 kg (1.8 lb) |
| I/O Modules |
241.3 mm x 24.4 mm x 99.1 mm |
0.20 kg (0.44 lb) |
Environmental Limits
| Parameter |
Details |
| Operating Temperature |
-30°C to +65°C (-22°F to +150°F). |
| Storage Temperature |
-40°C to +85°C (-40°F to +185°F). |
| Humidity |
Up to 95%, non-condensing. |
Ordering Information
The part number format is 3500/50-AA-BB, with the following options:
| Option |
A: I/O Module Type |
| 01 |
I/O Module with Internal Terminations. |
| 02 |
I/O Module with External Terminations. |
| 04 |
I/O Module with Internal Barriers and Internal Terminations. |
| Option |
B: Hazardous Area Approval |
| 00 |
None. |
| 01 |
cNRTLus (Class 1, Division 2). |
| 02 |
ATEX/IECEx/CSA (Class 1, Zone 2). |
Download PDF file here:
Click to Download PDF
