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- Overview
- Quick Detail
- Description
- Applications
- Specifications
- Competitive Advantage
- Recommended Products
Overview
Place of Origin: |
USA |
Brand Name: |
Bently Nevada |
Model Number: |
3500/50 |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
5-7 days |
Payment Terms: |
T/T |
Supply Ability: |
In stock |
Quick Detail
|
Signal Input |
Accepts up to two transducer signals from proximity probe transducers or magnetic pickups |
|
Input Signal Range |
+10.0 V to -24.0 V (internally limited if exceeded) |
|
Input Impedance |
20 kΩ (standard), 40 kΩ (TMR), 7.15 kΩ (Internal Barrier) |
|
Power Consumption |
5.8 W typical |
|
Compatible Transducers |
1 to 2 proximity transducer signals |
|
Front Panel OK LED |
Indicates module operating properly |
|
Front Panel TX/RX LED |
Indicates communication with other 3500 rack modules |
|
Front Panel Bypass LED |
Indicates Bypass Mode active |
|
Output Connector |
One coaxial connector per channel (front), short-circuit and ESD protected |
|
Buffered Output |
Available at I/O module via Euro style connectors |
|
Dimension: |
2.5x25.5x24cm |
|
Weight: |
0.82kg |
Description
The 3500/50M Tachometer Module is a 2-channel instrument designed for automation systems, accepting inputs from proximity probes or magnetic pickups to measure shaft speed, rotor acceleration, and rotation direction. Each channel conditions signals with 20 kΩ standard, 40 kΩ TMR, or 7.15 kΩ internal barrier impedance, providing accurate speed monitoring with ±0.25% resolution at room temperature and ±0.7% over full temperature range. The 3500/50M Tachometer Module generates alarms for speed, acceleration, reverse rotation, or zero-speed conditions and supplies conditioned Keyphasor signals to the 3500 rack backplane. It provides recorder outputs of 4–20 mA per channel, short-circuit protected, and updates measurements approximately every 100 ms. Consuming 5.8 W per module and occupying one full-height front slot, the 3500/50M Tachometer Module delivers real-time rotor monitoring, programmable alarms, and peak speed storage for automated machinery control.
Applications
Measure Shaft Speed in Rotating Machinery
The 3500/50M Tachometer Module captures rotor speed using proximity probe or magnetic pickup signals with 20 kΩ standard or 40 kΩ TMR impedance, providing rpm measurements with ±0.25% resolution at room temperature and ±0.7% across the full temperature range for automated monitoring.
Monitor Rotor Acceleration
The 3500/50M Tachometer Module calculates rotor acceleration with update rate of 100 ms, generating alarms when acceleration exceeds thresholds, enabling automated speed-change detection.
Detect Reverse Rotation Events
The 3500/50M Tachometer Module identifies reverse rotation using 7.15 kΩ internal barrier input signals and records peak reverse speeds, allowing operators to trigger automated corrective actions.
Provide Keyphasor Signals to Other Monitors
The 3500/50M Tachometer Module outputs conditioned Keyphasor signals via 550 Ω coaxial connectors to the 3500 rack backplane, enabling other monitors to process accurate rotor phase signals without additional modules.
Specifications
|
Output Impedance |
550 Ω |
|
Transducer Power Supply |
24 Vdc, 40 mA maximum per channel |
|
Recorder Output |
4–20 mA, proportional to module full-scale range (rpm or rpm/min), independent per channel, unaffected by short circuit |
|
Voltage Compliance (Current Output) |
0 to +12 Vdc across load |
|
Load Resistance |
0 to 600 Ω |
|
Resolution |
0.3662 µA per bit; ±0.25% error at room temperature; ±0.7% over temperature range |
|
Update Rate |
Approximately 100 ms |
|
Rack Space Requirement |
Monitor Module: 1 full-height front slot; I/O Modules: 1 full-height rear slot |
Competitive Advantage
Integrate Multiple Measurement Functions
The 3500/50M Tachometer Module combines speed, acceleration, direction detection, and Keyphasor output in a single 2-channel module, reducing rack space to one full-height front slot and simplifying automation system wiring.
Deliver High Accuracy Readings
The 3500/50M Tachometer Module achieves ±0.25% resolution at room temperature and ±0.7% across temperature range, providing reliable rpm and acceleration data for automated machinery control.
Enable Configurable Alarms
The 3500/50M Tachometer Module programs alarms for speed, acceleration, reverse rotation, and zero-speed events using 3500 Rack Configuration Software, with peak values stored for automated monitoring decisions.
Provide Real-Time Data Updates
The 3500/50M Tachometer Module delivers 4–20 mA recorder outputs per channel and updates measurements every ~100 ms, supporting continuous automation feedback loops.
