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      3700A

      32-Point 0-5 VDC Analog Input Module
      In Stock
      Ships by Wednesday, November 11
      Fast Shipping Available
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Triconex 3700A is a thirty-two-point differential TMR analog input module. It digitizes 0-5 VDC process signals with overrange measurement and voted channel selection.

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      Technical specifications for 3700A

      • Manufacturer:
        Invensys
      • Product Category:
        DCS Systems
      • Spare Part Number:
        3700A
      • Estimated shipping dimensions:
        2.1x40.6x39.8cm
      • Weight:
        1.9 kg
      • Tariff Code:
        8537101190
      • Counliy of origin:
        USA
      • Module type:
        TMR analog input
      • Input points:
        32 differential; DC coupled
      • Input range:
        0 to 5 VDC plus 6% overrange
      • Isolated points:
        No
      • Input update rate:
        55 ms
      • Resolution:
        12 bit
      • Accuracy:
        <0.15% FSR, 0 to 60 degC
      • Input resistance:
        30 MOhm DC minimum
      • Power-off resistance:
        30 kOhm DC typical
      • Common-mode rejection:
        -80 dB DC to 100 Hz typical
      • Common-mode range:
        -12 to +12 V peak
      • Leg-to-leg isolation:
        200 kOhm typical
      • Normal-mode rejection:
        -3 dB at 8 Hz; -17 dB at 60 Hz; -23 dB at 120 Hz
      • Input overrange protection:
        150 VDC / 115 VAC continuous
      • Current-input option:
        0-20 mA with 250 Ohm shunt
      • Indicators:
        PASS; FAULT; ACTIVE
      • 2-wire current panel:
        9761-210
      • User-configurable current panel:
        9771-210
      View as PDF Ask for Quote

      Information

      Overview Manuals Common Applications Product Precautions
      Triconex 3700A is a thirty-two-point differential TMR analog input module. It digitizes 0-5 VDC process signals with overrange measurement and voted channel selection.
      • Samples thirty-two differential analog inputs through three independent channels
      • Converts field voltage to digital values and performs mid-value selection each scan
      • Measures a six-percent extension above the nominal 0-5 V range
      • Supports online hot-spare replacement through a separate termination panel

      3700A installs with 9761-210, 9771-210, or other listed termination panel, 0-5 V differential transmitters, Tricon I/O chassis and hot spare, shielded analog field wiring in an engineered Tricon analog input configuration.

      The commissioning workflow covers installed-hardware matching, controlled start-up and functional verification for this 32-point 0-5 vdc analog input module.

      Important Notice: Confirm the complete 3700A marking, installed-system configuration, field connections and controlled functional test before commissioning or replacement.

      Apter Power 3700A Manuals and Guides
      Apter Power 3700A Product Technical Reference PDFApter Power 3700A Installation and Verification PDF
      The first document is an Apter Power model-specific technical reference. The second supports model-specific installation, configuration and engineering verification.
      Safety transmitter 4-20 mA conversionSupports safety transmitter 4-20 mA conversion through the installed 32-point 0-5 vdc analog input module in a configured Tricon system.
      Differential 0-5 V process measurementUses 3700A for differential 0-5 V process measurement after the assigned host module, field interface and channel mapping are confirmed.
      Shared transmitter integration through 9771-210Applies the 3700A hardware arrangement to shared transmitter integration through 9771-210 with controlled wiring and signal verification.
      Hot-spare analog-input maintenanceProvides a defined engineering path for hot-spare analog-input maintenance, including installation checks and final functional proof.
      Read the applicable Triconex installation instructions before work. Verify 3700A and the installed Tricon analog input configuration.
      1Verify 3700A and the thirty-two-point differential input assignment before work.
      2Place affected analog safety functions in the approved maintenance condition.
      3Isolate transmitter supplies and record polarity, shielding, and channel scaling.
      4Confirm any 250-ohm shunt and termination-panel jumper arrangement.
      5Keep common-mode voltage and input overrange inside the published limits.
      6Use ESD controls and inspect the keyed module and hot-spare slot.
      7Inject controlled values across the range and compare all three channel readings.
      8Verify PASS/FAULT/ACTIVE state, scaling, alarms, and safety action before release.

      Technical notes

      Match the panel and shunt arrangement to voltage or current service, preserve differential polarity and common-mode limits, then prove scaling and mid-value channel agreement.

      FAQ View All FAQ

      • How is differential common-mode limits handled during a 3700A replacement?
        Record the installed state first, isolate the associated process function, reproduce only the approved model-specific arrangement, and verify it before energization.
      • Which diagnostics should be reviewed after installing 3700A?
        Review the applicable point, module, power, communication, or load indicators for 3700A, then confirm the intended role: samples thirty-two differential analog inputs through three independent channels.
      • Can 3700A be substituted for a similar Triconex model without a configuration review?
        No. Confirm the exact model, companion hardware, signal execution, system version, and approved configuration before any substitution.
      • What evidence should be retained after mid-value selection validation testing on 3700A?
        Retain the full 3700A identity, as-left connections or settings, final diagnostics, measured functional-test result, and authorization to return the affected process function to service.
      • Which installed hardware must be matched before fitting 3700A?
        Match 3700A to 9761-210, 9771-210, or other listed termination panel and 0-5 V differential transmitters, then confirm the complete physical marking and assigned Tricon analog input position.
      • How should an engineer verify 0-5 V plus six-percent overrange for 3700A?
        Use the approved connection drawing and the model-specific values in Tricon Systems Technical Product Guide; preserve the as-found terminal, connector, polarity, shield, and channel identity.
      • What check is required for 250-ohm current-input conversion when commissioning 3700A?
        Apply a controlled signal or command within the documented range and compare the field result, controller indication, and product diagnostics before normal operation.
      • Which installation error is most important to prevent on 3700A?
        Do not interchange 3700A with an adjacent execution or alter its matched 9761-210, 9771-210, or other listed termination panel; the exact electrical, channel, and connector arrangement must be retained.
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