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3351

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Schneider Electric Triconex 3351 is a 32-point 4–20 mA analog input module with commoned field connections. It brings process transmitter signals into a Tricon safety system.
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Technical specifications for 3351

  • Manufacturer:
    Invensys
  • Part Number:
    3351
  • Product Family:
    Tricon System
  • Product Type:
    Trident Analog Input Module
  • Stock:
    1
  • Input points:
    32
  • Signal range:
    4–20 mA
  • Overrange:
    6%
  • Input arrangement:
    Commoned
  • 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 Temperature Range Monitoring Environmental Ratings

Features:

  • Acquires analog field measurements for compatible Trident safety-controller applications.
  • Conditions and converts process signals for fault-tolerant controller evaluation.
  • Uses the channel arrangement and electrical characteristics defined for model 3351.
The selected item is the Trident Analog Input Module identified by model 3351.

It brings continuous process measurements into the controller for monitoring, interlock and safety logic.

Confirm signal type, termination, scaling, grounding and chassis compatibility before replacement.

Availability is subject to Apter Power inventory and sourcing confirmation.
Verified resources for Triconex 3351: 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.
  • Acquires pressure, flow, level and other analog process measurements for Trident safety logic.
  • Supports continuous monitoring of critical variables used by shutdown and permissive functions.
  • Provides an exact-model spare for installed analog-input channels and their documented termination hardware.
  • Operate the module within the ambient limits specified for the populated Trident chassis.
  • Allow cabinet temperature to stabilize before accuracy checks or channel calibration.
  • Protect stored modules from condensation and rapid thermal transitions before installation.
  • Channel values are presented to the controller for alarm, interlock and safety-logic evaluation.
  • Input diagnostics and engineering trends should be reviewed after a module or termination change.
  • Compare live readings with independent references before returning affected functions to service.
  • Maintain the documented humidity, vibration and contamination limits for the complete installation.
  • Use the module only within enclosure and hazardous-area conditions supported by the project approvals.
  • Preserve grounding, shielding and cabinet airflow required for stable analog measurement.
Description
Schneider Electric Triconex 3351 concentrates thirty-two current-loop measurements in a single analog input module for Tricon safety and critical-control applications. The commoned arrangement is intended for compatible field transmitters and cabinet designs where channel returns follow the documented wiring scheme. The channel density reduces chassis space for large transmitter populations, but it also makes accurate terminal records essential when several process loops share the module boundary.

Converted measurements are delivered to the controller application for comparison against permissive, trip or monitoring logic. The input architecture supports continuous module supervision so wiring or channel behavior can be assessed within the system’s diagnostic strategy rather than treated as unverified raw data. This use of conditioned analog data lets the application distinguish a process deviation from a discrete device state and apply the configured validation or voting strategy.

Field replacement requires careful preservation of terminal assignments, loop polarity and the shared reference arrangement. Isolate or maintain every connected process loop according to the shutdown plan, then confirm channel scaling and proof-test results before returning the module to service. Final verification should compare live engineering values with calibrated loop sources across the working span, not merely confirm that each channel reports a nonzero signal.
Alternative Names
Triconex 3351 3351 Analog Input Module 3351 32-Point Analog Input Schneider Electric 3351 Tricon 3351 4-20 mA Input 3351 Commoned AI Module Invensys Triconex 3351 3351 Tricon Analog Input Card
Technical notes
Before removing Triconex 3351, isolate or control all commoned loops and preserve channel scaling; one wiring error can affect multiple safety inputs.
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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.
How are 3351 field returns arranged?
The documented commoned architecture requires the cabinet and loop references to follow the approved wiring design.
Where is Triconex 3351 applied?
It acquires process-transmitter signals used by safety, permissive and critical monitoring logic.
How should a 3351 replacement be planned?
Preserve terminal mapping, loop polarity, scaling and the approved proof-test sequence for all connected channels.
Can another analog input card replace 3351?
Only after confirming channel architecture, signal type, terminal assembly, diagnostics and application configuration.
Which manual supports 3351 installation?
Use the official Tricon planning, installation and field-wiring documentation for the installed release.
What details are needed to quote 3351?
Provide the label, chassis and terminal assembly, system release, quantity and destination.