Product Description
Product Details
Manufacturer: Bently Nevada
Series: 3500/50
Model/Part Number: 133388-02E
Model Type: Tachometer Module
Description
The 3500/50M Tachometer Module is a 2-channel module designed to monitor machinery speed and direction. It accepts input signals from proximity probes or magnetic pickups and provides accurate measurements of:
- Shaft rotative speed
- Rotor acceleration
- Rotor direction
The module compares these measurements to user-programmable alarm setpoints and generates alarms when setpoints are exceeded, ensuring reliable machinery protection.
Specifications
Inputs
| Parameter |
Details |
| Signal Type |
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; max 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 (non-barrier) |
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 |
95%, non-condensing. |
Ordering Information
The part number format is 3500/50-AA-BB, where:
A: I/O Module Type
| Option |
Description |
| 01 |
I/O Module with Internal Terminations. |
| 02 |
I/O Module with External Terminations. |
| 04 |
I/O Module with Internal Barriers and Internal Terminations. |
B: Hazardous Area Approval
| Option |
Description |
| 00 |
None. |
| 01 |
cNRTLus (Class 1, Division 2). |
| 02 |
ATEX/IECEx/CSA (Class 1, Zone 2). |
Applications
-
Shaft Rotative Speed Measurement: Ensures precise speed monitoring for rotating machinery.
-
Rotor Acceleration and Direction: Suitable for applications requiring rotor acceleration and directional analysis.
-
Alarm Triggering: Protects machinery by comparing measurements to alarm thresholds.
-
Versatile Transducer Compatibility: Works with proximity probes and magnetic pickups for diverse industrial environments.
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