Overview
Key Functions
The module processes pulse signals from two transducer channels to determine rotational speed, rotor acceleration, or rotation direction. The selected monitoring functions and alarm conditions depend on the rack configuration. This allows the module to support different speed-monitoring requirements without treating every channel as the same measurement type.
- Speed monitoring: Measures shaft rotational speed and supports configured speed alarm functions.
- Acceleration monitoring: Detects changes in rotor speed for configured acceleration alarm functions.
- Direction monitoring: Supports reverse-rotation detection and zero-speed notification when configured.
- Keyphasor signal conditioning: Provides a conditioned signal to the 3500 rack backplane for use by other compatible monitors.
- Peak hold: Stores the highest speed, highest reverse speed, or reverse-rotation count, depending on the selected channel function. Users can reset the stored peak values.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 286566-02 |
| Brand | Bently Nevada |
| Product Type | Dual Channel Tachometer Module |
| Product Series | 3500/50M |
| Number of Channels | 2 |
| Transducer Types | Proximity probes or magnetic pickups |
| Measured Quantities | Shaft speed, rotor acceleration, or rotation direction |
| Configuration Software | 3500 Rack Configuration Software |
| Keyphasor Capability | Conditioned output to rack backplane |
| Peak Hold Functions | Peak speed, peak reverse speed, or reverse-rotation count; resettable |
| Speed Control | Not intended for speed control |
| Overspeed Protection | Not intended for overspeed protection |
| Stock Quantity | 4 units |
Configuration and Application Notes
The selected channel configuration determines which measurement and alarm functions are available. Before replacing an existing module, verify the rack configuration, transducer type, and required monitoring function rather than assuming that every supported function operates simultaneously.
The conditioned Keyphasor output can provide a timing reference to other monitors in the rack. This supports synchronized machinery measurements where the system configuration requires a reference pulse.
Important limitation: This module is intended for monitoring and alarm functions. It should not be selected as the primary device for speed regulation or overspeed protection.
Frequently Asked Questions
Q: How many transducer channels does the 286566-02 support?
A: It supports two monitoring channels. Each channel can use a proximity probe or magnetic pickup, subject to the restrictions of the selected measurement function.
Q: Can the module detect reverse rotation and acceleration?
A: Yes. It supports rotor acceleration and reverse-rotation monitoring when configured for those functions. The available measurements depend on the channel configuration.
Q: Can the 286566-02 provide overspeed protection?
A: It is not intended for overspeed protection. Applications requiring a dedicated overspeed protection function need a suitable protection system designed for that purpose.
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