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        T3420A

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        ICS TRIPLEX T3420A is a TUV-certified, high-density analog input module for the Regent safety system, featuring 16 single-ended/8 differential channels, 12-bit resolution, and 2500V isolation.
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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 T3420A

        • Manufacturer:
          ICS Triplex
        • Part Number:
          T3420A
        • Product Family:
          ICS Regent+Plus
        • Product Type:
          Analog Input Module
        • Resolution:
          12-bit
        • Input Impedance:
          >10 MΩ (voltage mode)
        • Isolation:
          2500 Vdc minimum (field to logic)
        • Temperature Drift:
          55 to 110 ppm/°C (depending on range)
        • Power Consumption:
          9 W (31 BTU/hr)
        • Operating Temperature:
          0°C to +60°C (32°F to 140°F)
        • Storage Temperature:
          -40°C to +85°C (-40°F to 185°F)
        • Humidity:
          0 to 95% RH, non-condensing
        • Vibration:
          10-55 Hz, ±0.15 mm
        • Weight:
          1.52 kg
        • Estimated shipping dimensions:
          3.2x26.5x36cm
        • 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 Specifications Applications Monitoring & Control Performance & Efficiency

        Features:

        • High-Density 16-Channel Analog Input with Flexible Ranges
        • Triple-Modular Redundancy (TMR) with Online Self-Testing
        • Comprehensive Diagnostics & Out-of-Range Alarming
        The ICS TRIPLEX T3420A packs 16 single-ended or 8 differential channels into a single I/O slot, saving valuable chassis space. Jumper-selectable voltage ranges (0-5V, 1-5V, -5-+5V, 0-10V, -10-+10V) and external 250Ω resistors for current loops (4-20 mA, 0-20 mA, etc.) make it adaptable to virtually any field transmitter. The 12-bit resolution (0-4095 counts) provides sufficient granularity for safety-critical analog measurements such as pressure, temperature, level, and flow.

        For SIL-rated applications, the ICS TRIPLEX T3420A can operate in a TMR configuration where three modules listen to the same sensor. Each module contains internal voter circuits that are periodically tested by the controller – the processor sends discrepant data through one leg to verify that the module correctly outvotes incorrect values. If a module fails, it can be hot-replaced without disturbing field wiring or stopping the process, ensuring maximum uptime for ESD and BMS systems.

        Beyond simple analog-to-digital conversion, the ICS TRIPLEX T3420A provides loopback logic tests that write/read data to verify I/O bus interface health. Out-of-range detection triggers a dedicated NOSIG contact per point when signals exceed configurable thresholds (e.g., >10.3V on 0-10V range). Front-panel LEDs give instant visual feedback: green ACTIVE blinks at the controller scan rate during normal operation, and red FAULT latches on for any module-level failure, including mismatched module ID or voter test errors.

        The T3420A ICS-TRIPLEX Analog Input Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        ICS-TRIPLEX T3420A 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.
        ICS-TRIPLEX T3420A Analog Input Module

        General

        • Manufacturer ICS-TRIPLEX
        • Model T3420A
        • Condition New Original ready stock
        • Product Family T3480,T3401,T3419
        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.
        • Emergency Shutdown (ESD) – Oil & Gas:Monitors wellhead pressure, separator level, and compressor suction. TMR voting on a single 4-20 mA loop ensures no single module failure blocks a shutdown command (SIL 3 capable).
        • Fire & Gas (F&G) Detection:Connects to 4-20 mA gas detectors (catalytic/IR). Fast 3.60 ms update rate catches dangerous concentrations quickly; NOSIG alarms flag wiring faults or end-of-life conditions.
        • Burner Management Systems (BMS):Reads flame scanners, furnace pressure, and O₂ analyzers. 2500V isolation protects logic from ignition transients; hot-swap allows maintenance without burner shutdown.
        • Refinery & Petrochemical Safety:Interfaces with temperature (via signal converters), flow, and level transmitters in hydrocrackers, reformers, and furnaces. Mixing voltage/current inputs on the same module reduces spares and simplifies marshalling.
        • Deterministic Scanning:Fixed scan rates: 3.60 ms (16 SE) or 1.80 ms (8 Diff). No lockout delays – fresh data every scan for fast interlocks (turbine overspeed, high-pressure trips).
        • LED Status at a Glance:Green ACTIVE flashes at controller scan rate; red FAULT lights for any internal failure (voter error, missing ID, bus fault). Instant module-level diagnosis.
        • Out-of-Range (NOSIG) Alarming:Continuously checks against under/over thresholds (e.g., < -0.30V or > +10.30V on 0-10V range). Sets NOSIG bit to flag sensor faults or broken wires – prevents logic from acting on false “low” readings.
        • Online Diagnostic Testing:Controller periodically injects discrepant data to test voter circuits. Loopback tests verify I/O bus interface – all without disturbing the actual field signal.
        • Hot Swap = Zero Downtime:In TMR, remove/replace any single module while the other two continue providing valid data. No process shutdown for maintenance – critical for continuous refining and power generation.
        • High Density Lowers Costs:16 SE channels per module – more points per inch than 8-channel designs. Fewer chassis, power supplies, and cables, reducing both CAPEX and spares inventory.
        • Once-a-Year Calibration:55-110 ppm/°C drift (range dependent) = < ±0.3% drift per year in 0-60°C environments. Annual check only, not quarterly – cuts maintenance labor significantly.
        • Simple Field Calibration:Optional T3322 I/O extender allows calibration without disconnecting field wiring. Front-panel Offset/Gain pots (no cover removal) – 15 minutes per module with a common trim tool.
        Description
        The ICS TRIPLEX T3420A analog input module provides a reliable and fault-tolerant interface for field analog signals within the Regent I/O chassis. Supporting up to 16 single-ended or 8 differential voltage inputs, this module is jumper-configurable for multiple input ranges including 0-5V, 1-5V, -5-+5V, 0-10V, and -10-+10V. When combined with external 250-ohm precision resistors (available on optional termination blocks T3325-S or T3325-D), it seamlessly converts standard 4-20 mA or 0-20 mA current loops into measurable voltage signals. Each channel is sampled continuously—3.60 msec for all 16 single-ended channels or 1.80 msec for 8 differential channels—ensuring real-time data availability for safety-critical control logic.

        Designed for high availability, the ICS TRIPLEX T3420A supports triple-redundant (TMR) configurations where three modules connect in parallel to a single sensor. In such setups, the module's internal voter circuits and triplicated I/O Safetybus interface ensure that no single module failure can corrupt system data or disrupt operations. The module is hot-replaceable, allowing failed units to be removed and replaced without powering down the system or interrupting input signals. Front-panel ACTIVE (green) and FAULT (red) LEDs provide immediate visual status, while extensive online diagnostics—including loopback logic tests and periodic voter circuit checks—are automatically executed by the host controller.

        The ICS TRIPLEX T3420A is TUV certified for non-interfering safety applications up to Risk Class 5, meeting the rigorous demands of emergency shutdown (ESD), fire and gas (F&G), and burner management systems (BMS). Its 2500V isolation between analog field wiring and control logic protects against transients and overvoltages, while built-in out-of-range detection triggers NOSIG contacts when signals exceed configured thresholds. For installations requiring annual recalibration, the module features front-accessible offset and gain potentiometers, and an optional I/O extender (T3322) allows calibration without disturbing field wiring.
        Alternative Names
        T342OA T3480 T8431 T3419 T3401 T3411F T3411 T3310
        Technical notes
        The ICS TRIPLEX T3420A is exclusively compatible with the Regent I/O chassis and must be configured using WINTERPRET software with specific slot keying (upper 9, lower 15). Unlike later Triconex systems, the ICS TRIPLEX T3420A does NOT support HART protocol and provides 12-bit resolution; it is calibrated at the factory for 1-5V single-ended operation.
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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 software is required to configure the ICS TRIPLEX T3420A?
        The ICS TRIPLEX T3420A must be configured using the WINTERPRET I/O Configuration Editor. You must select the correct module type from the list (T3420A for standard response vs. T3420AF for fast response), then define tag names (max 12 characters) and descriptions (max 40 characters) for each analog point. Scaling from raw 0-4095 counts to engineering units is done via the Analog Scaling function block.
        Can the ICS TRIPLEX T3420A communicate with HART smart transmitters?
        No. The ICS TRIPLEX T3420A does not support HART protocol. It is a pure analog input module providing 12-bit digital values from 4-20 mA or voltage signals. For HART communication, you would need a separate HART multiplexer or a different I/O platform.
        Is the ICS TRIPLEX T3420A SIL-certified? Can I use it in an ESD system?
        Yes. The ICS TRIPLEX T3420A is TUV certified to DIN V VDE 0801 for Risk Class 5, which qualifies it for safety-critical applications such as Emergency Shutdown (ESD), Fire & Gas (F&G), and Burner Management Systems (BMS). For SIL 3 architectures, you must use three modules in a TMR configuration with mid-value selection in the application program.
        What are the environmental limits for installing the ICS TRIPLEX T3420A?
        The ICS TRIPLEX T3420A operates from 0°C to +60°C (32°F to 140°F) with 0-95% non-condensing humidity. It withstands 15 g shock (11 msec half-sine) and 10-55 Hz vibration at ±0.15 mm. EMC immunity meets IEC 801-2 Level 3 (6 kV contact discharge) and IEC 801-3 Level 3 (10 V/m radiated). No special conformal coating is required for non-hazardous locations.

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