TRICONEX 3511
TRICONEX 3511
TRICONEX 3511
TRICONEX 3511
TRICONEX 3511
TRICONEX 3511
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3511

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Schneider Electric Triconex 3511 is an eight-channel high-accuracy pulse input module with a typical 25 ms update rate. It measures independent 20 Hz to 20 kHz differential sources.
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Technical specifications for 3511

  • Manufacturer:
    Invensys
  • Part Number:
    3511
  • Product Family:
    Tricon System
  • Product Type:
    8-channel TMR Pulse Input Module
  • Stock:
    1
  • Input signals:
    8, non-commoned
  • Input type:
    AC-coupled, balanced differential
  • Input frequency range:
    20 Hz to 20 kHz
  • Accuracy at 1 kHz to 20 kHz:
    ±0.01%
  • Accuracy at 100 Hz to 999 Hz:
    ±0.01%
  • Accuracy at 20 Hz to 99 Hz:
    ±1.0%
  • Typical update rate:
    25 ms
  • Load impedance:
    > 8 kΩ; 20 kΩ typical
  • Common-mode range:
    -100 V to +100 V peak-to-peak
  • Normal-mode range:
    1.5 V to 200 V peak-to-peak
  • Over-range protection:
    ±150 VDC continuous
  • Typical sensitivity:
    0.5 V peak-to-peak sine wave
  • Worst-case sensitivity:
    1.5 V peak-to-peak sine wave
  • Logic power:
    < 20 W
  • Weight:
    5.25 lbs (2.38 kg)
  • Estimated shipping dimensions:
    2.2 × 40.8 × 39.8 cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Applications Pulse Measurement Frequency Measurement Performance

Features:

  • Provides eight TMR pulse-input channels for fault-tolerant measurement in Tricon systems.
  • Processes field pulse trains for controller counting, speed and frequency evaluation.
  • Maintains triplicated acquisition paths for critical measurement availability and diagnostics.
The selected item is the eight-channel TMR Pulse Input Module identified by model 3511.

It converts supported sensor pulses into controller information for rotating-equipment, flow or event-based safety functions.

Confirm signal amplitude, channel frequency, termination, scaling and proof-test requirements before replacement.

Availability is subject to Apter Power inventory and sourcing confirmation.
Verified resources for Triconex 3511: Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Measures pulse signals used for speed, frequency, flow-totalizing and event-counting functions.
  • Provides redundant acquisition for critical rotating-equipment and process-protection measurements.
  • Supports exact-model maintenance of eight-channel TMR pulse-input installations.
  • Eight channels acquire discrete pulse trains through the documented TMR input architecture.
  • Signal threshold and termination must match the connected pickup or pulse-producing device.
  • Channel counts should be verified with known test pulses after wiring or module changes.
  • The module converts pulse timing into frequency information used by controller logic.
  • Configured scaling must correspond to the sensor pulse rate and the engineering-unit calculation.
  • Commissioning should compare displayed frequency with an independent reference across the required range.
  • Triplicated input processing supports continued measurement if one internal path develops a fault.
  • Measurement response depends on the supported frequency range and clean field-signal transitions.
  • Acceptance testing should confirm repeatability, channel agreement and expected diagnostic behavior.
Description
Schneider Electric Triconex 3511 provides eight balanced, AC-coupled differential inputs for precise pulse and frequency acquisition. Its wide common-mode capability and independent channel references suit installations where multiple speed or frequency sources must remain electrically separated. This architecture supports accurate multi-channel measurement without forcing unrelated sensors to share a signal reference, improving resilience in complex rotating-equipment installations.

The module improves update performance to a typical 25 ms and maintains defined accuracy across separate low- and high-frequency bands. Input protection and high impedance help the receiving circuit tolerate industrial wiring conditions while preserving the timing information required by the controller. The faster conversion path is useful where the application must respond to changing machine speed while still distinguishing a valid source from abnormal input conditions.

Commissioning should confirm source amplitude at the module terminals, not only at the sensor or driver. Preserve pair polarity, shield termination and scaling for every channel, then compare live readings against calibrated equipment before releasing associated protection functions. Acceptance testing should cover the frequency bands used by the process and confirm stable readings with actual cable lengths, shielding and source electronics in place.
Alternative Names
Triconex 3511 3511 Pulse Input Module 3511 Eight-Channel Pulse Input Schneider Electric 3511 Tricon 3511 High-Accuracy Frequency Input 3511 Balanced Differential Input Module Invensys Triconex 3511 3511 Tricon Pulse Input Card
Technical notes
Before replacing Triconex 3511, verify every channel against calibrated equipment; an accepted but distorted waveform can produce an incorrect frequency value.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What distinguishes Triconex 3511 inputs?
They are balanced, AC-coupled and non-commoned to support independent high-accuracy pulse sources.
Where is 3511 typically applied?
It measures turbine speed, frequency and other pulse-derived variables used by critical logic.
How should 3511 signal quality be checked?
Measure waveform amplitude and frequency at the module terminals under the installed load.
Can 3511 replace 3510 without review?
No. Compare update rate, accuracy, sensitivity, common-mode limits, wiring and application configuration.
Which manual covers 3511?
Use the official Tricon high-accuracy pulse-input and field-wiring documentation.
What is needed to quote 3511?
Provide the label, signal ranges, terminal assembly, system release, quantity and destination.