Product Description
Product Details
- Manufacturer: Bently Nevada
- Series: 3500/50
- Model/Part Number: 133388-02D
- 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 to ensure reliable machinery protection.
Specifications
Inputs
- Signal Type: Accepts up to two transducer signals from proximity probes or magnetic pickups.
Outputs
-
Front Panel LEDs:
- 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
- Speed Input: Supports 1 to 255 events per revolution for rotor acceleration and zero speed.
- Full-Scale Range: 0.0039 to 255 events/revolution; maximum 99,999 rpm.
-
Frequency Range:
- Proximity Transducers: Minimum 0.0167 Hz (1 rpm for 1 event/revolution).
- Passive Magnetic Pickups: Minimum 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
- 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:
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). |