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        T3411

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        1001 reviews ｜ Need a Specific Revision?
        ICS Triplex T3411 Monitored Digital Input Module is a safety-oriented 16-channel input solution designed for reliable field signal monitoring with advanced line fault detection and high electrical 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 T3411

        • Manufacturer:
          ICS Triplex
        • Part Number:
          T3411
        • Product Family:
          ICS Regent+Plus
        • Safetybus Power:
          0.85 load units
        • Number of Inputs:
          16, common power return
        • Field Power:
          Voltage: 15 to 80 VDC / Current: 450 mA, maximum.
        • Turn-On Voltage (default):
          > 12 Vdc
        • Turn-Off Voltage (default):
          < 12 Vdc
        • Input Current:
          5.0 mA, maximum
        • Turn-On Delay:
          10 msec, maximum
        • Turn-Off Delay:
          10 msec, maximum
        • Heat Dissipation:
          8.5 Watts, 29 BTUs/hour
        • Over Voltage Protection Field Power Terminals:
          100 Vdc continuous / Input Terminals: 27 Vdc continuous
        • Fusing:
          None required, internal resistor limits current to 5 mA if input short circuit.
        • Isolation:
          2500 volts minimum (field wiring to control logic)
        • Operating Temperature:
          0° to 60° C (32° to 140° F)
        • Storage Temperature:
          -40° to 85° C (-40° to 185° F)
        • Operating Humidity:
          0 to 95% relative humidity, non-condensing
        • Weight:
          1.4 kg
        • Estimated shipping dimensions:
          3.1x26.4x35.8cm
        • 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 Diagnostics Connectivity Application Scenarios

        Features:

        • Provides 16-channel monitored input capability with built-in automatic circuit testing and continuous line fault detection for reliable field signal supervision.
        • Supports fault-tolerant parallel configuration with hot-replace functionality, enabling uninterrupted operation during maintenance or module replacement.
        • Ensures 2500 V electrical isolation between field wiring and control logic, combined with internal current-limiting protection for safe industrial operation.
        The ICS Triplex T3411 Monitored Digital Input Module is designed for industrial control systems requiring reliable and continuously verified digital input signals. The T3411 integrates monitoring functions that detect both input status and field wiring integrity, helping maintain safe system operation. Its architecture supports stable performance in environments where signal reliability is critical.

        In practical applications, the T3411 Monitored Digital Input Module connects to field devices powered within a wide voltage range and converts them into controlled logic-level signals. The module internally regulates power to ensure consistent operation and minimizes risks associated with unstable field wiring. The T3411 is especially useful in safety-related automation systems where input validation is essential.

        From a system integration perspective, the T3411 supports parallel operation with identical modules, enabling redundancy and continuous operation even during maintenance or module replacement. This feature improves system availability in industrial environments. The T3411 Monitored Digital Input Module therefore plays an important role in maintaining uninterrupted process monitoring and control reliability.

        The T3411 ICS Triplex Monitored Digital Input Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        ICS Triplex T3411 Monitored Digital 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 T3411 Monitored Digital Input Module Specs

        General

        • Manufacturer ICS Triplex
        • Model T3411
        • Condition New Original ready stock
        • Product Family T3411F,T8442,T3401
        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.
        • Circuit Self-Test: The module has a built-in automatic testing mechanism that performs complete periodic testing on all input circuits.
        • Fault Location: Automatically identifies open or short circuit faults in field wiring, improving maintenance efficiency.
        • Status Indication: The panel is equipped with LED indicators that visually display the module health, input signal, and line fault status for each channel.
        • Real-time Monitoring: Supports system-level monitoring via the diagnostic port, providing real-time feedback of line and input status to the main controller.
        • Fault Tolerance: Supports parallel connection of two identical modules, enabling fault-tolerant operation with redundant configurations.
        • Hot-Swap Support: Supports online replacement, allowing module replacement without downtime or program reloading.
        • Electrical Isolation: Provides at least 2500V high isolation between field circuits and logic circuits, ensuring signal transmission safety.
        • Flexible Contacts: Compatible with both wet and dry field contact connections, adapting to various sensor interface requirements.
        • Emergency Stop (ESD): Used in the oil, gas, or chemical industries to monitor critical safety trigger signals.
        • Fire & Gas Monitoring (F&G): Real-time acquisition of inputs from fire and gas detection devices to ensure rapid response of safety protection systems in high-risk environments.
        • Turbine/Compressor Control: High-reliability digital monitoring of operating parameters for large rotating machinery.
        • Boiler Management System (BMS): Monitoring the safety interlock status of combustion systems to meet the stringent SIL3 safety standards of the power and refining industries.
        Description
        The ICS Triplex T3411 Monitored Digital Input Module provides 16 monitored digital input channels with a common power return design, enabling structured and reliable field device signal acquisition. The T3411 is engineered to detect input switch status while simultaneously identifying field wiring open and short circuit conditions when used with a line monitoring device at the field switch. This makes the T3411 suitable for safety-related applications requiring continuous input integrity verification.

        In operation, the T3411 accepts field power within a voltage range of 15 to 80 VDC, with a maximum current of 450 mA. Internally, the module regulates field power to 24 VDC for input circuits, ensuring stable low-voltage signal processing. The T3411 features configurable default thresholds with turn-on voltage above 12 VDC and turn-off voltage below 12 VDC, supporting consistent switching behavior in industrial environments.

        The T3411 Monitored Digital Input Module supports fast response timing with a maximum turn-on and turn-off delay of 10 milliseconds. It includes internal current limiting up to 5.0 mA per input and eliminates the need for external fusing due to built-in resistor-based protection against short circuits. Electrical robustness is further reinforced by overvoltage protection up to 100 VDC on field terminals and 27 VDC on input terminals.

        With 2500 V minimum isolation between field wiring and control logic, the T3411 ensures strong protection against electrical disturbances. Heat dissipation is rated at 8.5 W (29 BTU/hr), while operating temperature ranges from 0°C to 60°C, and storage conditions extend from -40°C to 85°C. The module tolerates 0–95% relative humidity, non-condensing, supporting harsh industrial environments.

        Compared with the T3411F, the T3411 Monitored Digital Input Module focuses on a standard monitored input configuration with defined field power regulation and line monitoring capability, whereas T3411F variants are typically applied in alternative system configurations depending on system integration requirements. The T3411 emphasizes flexible safety integration with parallel redundancy capability, allowing multiple modules to operate in fault-tolerant configurations and enabling hot replacement without interrupting input signals.
        Alternative Names
        T3411F T8111 T8403 T3401 T3481
        Technical notes
        ICS Triplex T3411 Monitored Digital Input Module, 16 inputs with common power return, field power 15–80 VDC (450 mA max), internal regulation to 24 VDC, turn-on >12 VDC and turn-off <12 VDC, input current max 5.0 mA, delay max 10 ms, heat dissipation 8.5 W (29 BTU/hr), overvoltage protection 100 VDC field terminals and 27 VDC input terminals, no external fusing required due to internal current limiting, isolation minimum 2500 V field to logic, operating temperature 0–60°C, storage temperature -40–85°C, humidity 0–95% non-condensing, monitored input with line fault detection and fault reporting, hot-replaceable and supports parallel redundancy, TÜV certified Risk Class 5.
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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
        How does the T3411 handle field power supply?
        The T3411 Monitored Digital Input Module accepts 15 to 80 VDC field power and internally regulates it to 24 VDC for safe and stable input operation.
        What makes the T3411 suitable for safety systems?
        The T3411 provides automatic circuit testing, fault detection, and 2500 V isolation, ensuring fail-safe input handling for safety-critical environments.
        What happens if a T3411 module fails in operation?
        The T3411 Monitored Digital Input Module supports fault-tolerant parallel operation and hot replacement, allowing another module to maintain system input continuity.
        How does the T3411 ensure input signal accuracy?
        The T3411 uses defined turn-on and turn-off thresholds above and below 12 VDC with controlled delays up to 10 ms to ensure stable signal interpretation.

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