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        Invensys 3805E
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        Invensys 3805E
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        3805E

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Triconex 3805E is an eight-point, 12-bit TMR analog output module for 4–20 mA control loops in Tricon safety and critical-control systems.
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        Ships by Thursday, October 29
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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.
        Shipping Mode
        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.
        Parts Availability
        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.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 3805E

        • Manufacturer:
          Invensys
        • Part Number:
          3805E
        • Product Family:
          Triconex
        • Product Type:
          Analog Output Module
        • Stock:
          1
        • Product type:
          TMR analog output module
        • Number of output points:
          8
        • Return arrangement:
          Commoned return
        • Coupling:
          DC-coupled
        • Resolution:
          12 bits
        • Output current range:
          4–20 mA (+6% overrange)
        • Output overrange capability:
          2–21.2 mA
        • Output accuracy:
          <0.25% of FSR (0–21.2 mA), 0°C to 60°C
        • External loop power:
          Required; reverse-voltage protected
        • Nominal loop power:
          +24 VDC
        • Maximum loop power:
          +42.5 VDC
        • Loop power for 250 Ω load:
          >20 V, 1 A minimum supply
        • Loop power for 500 Ω load:
          >25 V, 1 A minimum supply
        • Loop power for 750 Ω load:
          >30 V, 1 A minimum supply
        • Loop power for 1000 Ω load:
          >35 V, 1 A minimum supply
        • Output overrange protection:
          +42.5 VDC continuous; 0 VDC continuous
        • Switch time on channel failure:
          10 ms typical; 20 ms maximum
        • Module status indicators:
          PASS, FAULT, ACTIVE, LOAD
        • Loop-power indicators:
          Pwr1, Pwr2; indicate loop power above 20 VDC
        • Logic power:
          <15 W
        • Weight:
          4.718 lbs (2.14 kg)
        • 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 Diagnostics Loop Power Replacement Application
        • Eight commoned-return, DC-coupled TMR analog outputs for supervised field-current loops
        • Independent voltage and current loopback circuits monitor every output point
        • Redundant external loop-power inputs with Pwr1 and Pwr2 presence indication

        The Invensys TRICONEX 3805E is a TMR analog output module for Tricon safety and critical-control systems. It converts triplicated controller commands into supervised current outputs for analog final-control devices.

        Each command is voted before a healthy channel drives the field loop. Independent voltage and current loopback circuits monitor signal accuracy, selected-channel current flow, and channel health without relying on the connected load alone.

        Before installation, verify the external loop-power design, load resistance, termination assembly, interface cable, Tricon system configuration, and field-device requirements. The Pwr indicators confirm power presence but do not prove that the available voltage is adequate under load.

        The Invensys TRICONEX 3805E TMR Analog Output Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

        Invensys TRICONEX 3805E TMR Analog Output Module Manuals, Datasheets, Links

        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.

        • Independent voltage and current loopback circuits verify signal accuracy, selected-channel current flow, and channel health for each point.
        • The Load indication identifies a point that cannot drive current, including an open field loop.
        • A Fault indication identifies a channel fault rather than complete module failure; fault-tolerant operation can continue while the fault is serviced.
        • Field loop power is supplied externally through the termination assembly, with provision for redundant sources.
        • Pwr1 and Pwr2 confirm loop-power presence above the detector threshold but do not prove that available voltage is adequate for the connected load.
        • Select the loop supply from the documented load-resistance requirement and include wiring and termination voltage drops in the check.
        • TRICONEX 3805E supports a hot-spare arrangement that permits online replacement of a faulty analog output module.
        • TRICONEX 3805H adds support for increased inductive loads and is documented as fully compatible in TRICONEX 3805E applications.
        • A separate field termination assembly and interface cable are required, and the module is mechanically keyed for the configured chassis position.
        • Emergency shutdown systems using supervised analog final-control elements
        • Burner management systems controlling modulating valves, dampers, or positioners
        • Critical process-control loops requiring fault-tolerant analog output commands
        Description
        Triconex 3805E is an eight-point, 12-bit TMR analog output module for 4–20 mA control signals. Its commoned-return, DC-coupled outputs provide a documented 2–21.2 mA overrange.

        The module receives triplicated output data, votes the channel data and uses independent voltage and current-loopback circuits to supervise signal delivery. PASS, FAULT, ACTIVE, LOAD, Pwr1 and Pwr2 indicators support operating checks.

        External loop power must be selected from the documented load-resistance requirements, and the termination panel must match the installation classification. The 3805H is the documented increased-inductive-load version compatible with 3805E applications.
        Alternative Names
        Triconex 3805E Invensys Triconex 3805E Triconex Model 3805E Triconex 3805 E Triconex 3805-E Triconex 3805E Analog Output Module Triconex 3805E TMR AO Module
        Technical notes
        TRICONEX 3805E requires external loop power and a compatible termination assembly. Match supply voltage to loop resistance, then verify Pwr1/Pwr2 and Load indications before service.
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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
        Why can TRICONEX 3805E show Pwr1 and Pwr2 while the field device still cannot reach the commanded current?
        Pwr1 and Pwr2 confirm that loop power is present, but they do not prove that enough voltage remains under load. Measure the supply at the termination under demand and include cable, termination, and field-device voltage drops.
        What should be investigated first when TRICONEX 3805E reports a Load condition?
        Trace the affected field loop before replacing the module. A disconnected device, open conductor, loose termination, incorrect return path, or inadequate loop power can prevent the point from establishing the expected current.
        Does a Fault indication on TRICONEX 3805E mean the complete module has stopped operating?
        Not necessarily. The manufacturer guide describes Fault as a channel-level diagnostic, not automatic proof of total module failure. Identify the affected channel and follow the approved maintenance procedure before disturbing the field circuit.
        Can TRICONEX 3805H replace TRICONEX 3805E when the connected device has a more inductive load?
        The manufacturer guide documents TRICONEX 3805H as the increased-inductive-load version and states that it is compatible with TRICONEX 3805E applications. Confirm the termination hardware and loop design before substitution.
        Can TRICONEX 3805E be changed while the Tricon controller remains online?
        The module supports the Tricon hot-spare method for online replacement. Confirm that the spare path is healthy, the correct slot is identified, and the site-approved transfer procedure is active before removing hardware.
        Can TRICONEX 3805E communicate with HART field devices?
        Yes, when it is used with the documented TRICONEX 2870H HART Analog Output Interface Module in a compatible Tricon system. Confirm the controller version, interface hardware, termination arrangement, and field-device design before commissioning.
        Does TRICONEX 3805E alone provide the complete field-loop connection?
        No. Installation also requires the correct field termination assembly and interface cable. Match both items to the chassis, wiring design, environmental classification, and documented configuration before ordering or replacement.

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