Product Description
Product Overview
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Manufacturer: Bently Nevada
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Series: 3500/50
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Model/Part Number: 286566-02G
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Type: Tachometer Module
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Function:
- A two-channel module designed for monitoring critical machinery parameters, including shaft speed, rotor acceleration, and direction.
- Processes input signals from proximity probes or magnetic pickups and compares them to user-defined alarm thresholds.
- Triggers alarms when thresholds are exceeded, ensuring machinery protection and safe operation.
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 rack. |
| Bypass LED |
Illuminates when the module is in bypass mode. |
Signal Conditioning
| Parameter |
Details |
| 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 (9.50 x 0.96 x 9.52 in) |
0.82 kg (1.8 lb) |
| I/O Modules |
241.3 mm x 24.4 mm x 99.1 mm (9.50 x 0.96 x 3.90 in) |
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
| 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). |
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