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          Apter Power supports Triconex 3700A quotations, English technical information, and analog-input matching.

        3700A

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        Triconex 3700A is a 32-point TMR analog input module that digitizes differential 0–5 VDC signals for mid-value processing by the Tricon main processors.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
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        Technical specifications for 3700A

        • Manufacturer:
          Invensys
        • Part Number:
          3700A
        • Product Family:
          Triconex
        • Product Type:
          TMR Analog Input Module
        • Stock:
          1
        • Input Range:
          0 to 5 VDC, plus 6% overrange
        • Input Points:
          32 differential inputs
        • Signal Format:
          DC-coupled
        • Isolation:
          Non-isolated
        • Resolution:
          12-bit
        • Update Time:
          55 ms
        • Accuracy:
          Less than 0.15% FSR at 0 to 60°C
        • Input Resistance:
          30 MΩ minimum
        • Power-Off Resistance:
          30 KΩ (DC), typical
        • Common Mode Rejection:
          -80 dB (DC-100Hz),typical
        • Common Mode Range:
          -12V to +12V peak
        • Leg-to-Leg Isolation:
          200 KΩ, typical
        • Normal Mode Rejection:
          @ 8Hz -3 dB, @ 60Hz -17 dB, @ 120Hz -23 dB
        • Input Overrange:
          150 VDC/115 VAC
        • Overrange Duration:
          Continuous
        • Current Range:
          0-20 mA, 250 Ω shunt
        • Module Status:
          PASS, FAULT, ACTIVE
        • Color Code:
          Yellow
        • 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 Signal Path Input Format Calibration Chassis Interface

        Features:

        • Measures thirty-two differential 0–5 VDC input points.
        • Uses three independent conversion channels for every signal.
        • Updates 12-bit input values at 55 ms intervals.
        Triconex 3700A includes six percent overrange above the nominal five-volt span, preserving conversion headroom for the input path.

        The non-isolated DC-coupled design maintains a direct differential signal path from the termination assembly to each measurement channel.

        Multiple onboard references support automatic calibration while the three results are delivered to the corresponding main processors.

        The Triconex 3700A TMR Analog Input Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Triconex 3700A TMR Analog Input Module Manuals,Datasheets,Link 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.

        Three-Channel Measurement Route

        • Channel A: One measurement path transfers data to the corresponding main processor.
        • Channel B: A second independent path converts the same field input.
        • Channel C: The third result completes the triplicated input set.
        • Selection: Mid-value processing determines the analog value used by the controller.

        Voltage Input Characteristics

        • Nominal Span: Differential inputs cover 0 to 5 VDC.
        • Overrange: Six percent is available above the nominal span.
        • Coupling: All signal points use a DC-coupled path.
        • Isolation: The thirty-two inputs are non-isolated.

        Reference-Based Accuracy Control

        • Reference Set: Multiple internal voltages check the conversion channels.
        • Automatic Action: Channel calibration is performed during module operation.
        • Rated Accuracy: Error remains below 0.15 percent of full scale from 0 to 60°C.
        • Digital Output: Each converted measurement is represented with 12-bit resolution.

        Backplane and Termination Connection

        • Field Wiring: Differential signals land on the assigned external termination panel.
        • Signal Cable: The termination assembly links the inputs to the Tricon backplane.
        • Slot Identity: Mechanical keying prevents placement in an unmatched position.
        • Input Loading: DC input resistance is at least 30 MΩ.
        Description
        Triconex 3700A is a thirty-two-point TMR analog input module for differential 0 to 5 VDC field signals in a Tricon system. Six percent overrange extends the conversion span beyond the nominal input limit.

        Three independent measurement channels within Triconex 3700A convert the field signals and send separate digital results to the corresponding main processors. Mid-value selection then supplies the input value used by the control program.

        All thirty-two inputs on Triconex 3700A are differential, DC-coupled, and non-isolated. Conversion uses 12-bit resolution with a 55 ms update interval, while accuracy remains within 0.15 percent of full scale from 0 to 60 degrees Celsius.

        The electrical input path of Triconex 3700A presents at least 30 megohms during operation and allows a common-mode range of -12 to +12 V peak. A 250-ohm shunt converts 0 to 20 mA current signals for measurement within the voltage-input architecture.

        Multiple reference voltages allow Triconex 3700A to calibrate its triplicated input channels during operation. Field wiring connects through the assigned external termination panel and cable, and mechanical keying identifies the correct backplane interface.
        Alternative Names
        3700A Triconex 3700A Tricon 3700A 3700-A 3700 A Analog Input Invensys Triconex 3700A Triconex 3700A AI Module Triconex 37OOA
        Technical notes
        Triconex 3700A converts thirty-two non-isolated differential 0–5 VDC inputs through a triplicated 12-bit measurement path.
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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.
        VIEW ALL FAQS
        What should be checked when Triconex 3700A readings disagree between channels?
        For Triconex 3700A, inspect the differential field wiring and termination path, then compare the three channel diagnostics before using the processed value.
        Can Triconex 3700A accept a 0–10 VDC transmitter directly?
        No. Triconex 3700A is specified for 0–5 VDC inputs with six percent overrange; a 0–10 VDC source requires appropriate signal conditioning.
        Why is grounding important for Triconex 3700A even though its inputs are differential?
        Triconex 3700A uses non-isolated, DC-coupled inputs, so field common-mode voltage must stay within the specified -12 to +12 V peak range.
        How does Triconex 3700A check conversion accuracy during operation?
        Multiple internal reference voltages let Triconex 3700A perform automatic calibration across its triplicated measurement channels.
        Which termination hardware must be matched to Triconex 3700A?
        Triconex 3700A must use the designated external termination panel and cable that route its thirty-two differential inputs to the backplane.
        What input timing should be considered for a changing process signal on Triconex 3700A?
        A design using Triconex 3700A should account for the 55 ms update interval before interpreting rapid field-signal changes.

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