Product Description
Product Details
Manufacturer: Bently Nevada
Series: 3500/50
Model/Part Number: 286566-02
Model Type: Tachometer Module
Function
The 3500/50 Tachometer Module is a two-channel module designed to provide reliable monitoring of machinery by measuring:
- Shaft Speed: Tracks the rotative speed of the shaft.
- Acceleration: Monitors rotor acceleration.
- Direction: Detects rotor direction.
This module accepts signals from proximity probes or magnetic pickups, processes them, and compares the results against user-defined alarm thresholds. Alarms are triggered when these thresholds are exceeded, ensuring machinery protection and operational safety.
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 during communication with other modules in the 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 | 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, where:
Option 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. |
Option B: Hazardous Area Approval
| Option | Description |
|---|---|
| 00 | None. |
| 01 | cNRTLus (Class 1, Division 2). |
| 02 | ATEX/IECEx/CSA (Class 1, Zone 2). |