Triconex Pulse Input Module | TMR 3511 High-Speed Speed Measurement

3511 | Triconex | TMR Pulse Input Module

• The Triconex 3511 is a high-accuracy Pulse Input (PI) module designed for Triple Modular Redundant (TMR) systems.
• It is specifically optimized for non-amplified magnetic speed sensors used on high-speed turbines and compressors.
• Features 1-microsecond resolution and 16-bit precision for high-integrity rotational speed monitoring.
• The module includes three isolated channels for internal voting to ensure maximum fault tolerance and zero nuisance trips.
  

Technical Engineering Specifications

• Brand: Triconex (Schneider Electric)
• Model: 3511
• Architecture: Triple Modular Redundant (TMR)
• Inputs: 8 Non-commoned, AC coupled, balanced differential
• Frequency Range: 20 Hz to 20,000 Hz
• Accuracy: ± 0.01% (at 1,000 Hz to 20,000 Hz)
• Resolution: 16-bit (1 microsecond)
• Update Rate: 25 ms typical
• Impedance: 20 KΩ typical
• Color Code: Light Purple
• Weight: 3.03 Kg

Diagnostic Capability & Application Scenes

• Continuous self-diagnostics monitor each of the three isolated channels for internal voting integrity.
• Overspeed Protection: Real-time RPM monitoring for gas and steam turbines.
• Compressor Control: High-speed frequency measurement for anti-surge and governing algorithms.
• Magnetic Pickups: Direct interface for passive speed sensors on heavy rotating machinery.
• Fault status is indicated via PASS/FAULT/ACTIVE LEDs and a chassis-level alarm signal.

Shipping & Global Warranty

• Warranty: 12-month comprehensive hardware replacement guarantee.
• Courier: Worldwide expedited shipping via FedEx, UPS, or DHL Express.
• Dispatch Time: Orders processed and shipped within 24 to 48 hours.
• Packing: Ships in specialized ESD-safe industrial packaging for maximum protection.

Selection & Purchasing Guide

• Ensure your input signal voltage falls between 1.5 V and 200 V peak-to-peak.
• Verify that your application requires rate measurement; the 3511 does not support totalization/counting.
• Maintain a hot-spare 3511 in your inventory to ensure continuous uptime during channel fault events.
• Confirm your sensor's wave shape (sine or square) is within the 10% to 90% duty cycle tolerance.

Professional FAQ

• What happens if one internal channel in the 3511 module fails?
• The Fault indicator activates, but the module continues to operate correctly by voting between the remaining two healthy channels.
• Does the 3511 module support hot-swapping?
• Yes, the 3511 supports hot-spare modules, allowing replacement while the process is running.
• Is this module compatible with square wave signals from active sensors?
• Yes, it can process sine, square, and pulse waveforms provided they meet the peak-to-peak voltage thresholds.
• Why is the update rate of 25 ms important?
• This rapid update rate allows the system to react to sudden mechanical speed changes, which is vital for overspeed protection.
• How do I confirm a point is receiving a signal?
• The 3511 features individual Input Status LEDs for each of the 8 points, which stay ON when a valid signal is detected.

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