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        T8451C

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        The ICS Triplex T8451C is a coated TMR 24 Vdc digital output module providing 40 output channels with integrated diagnostics, line monitoring, and fail-safe switching.
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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 T8451C

        • Manufacturer:
          ICS Triplex
        • Part Number:
          T8451C
        • Product Family:
          Trusted Triple Modular Redundant
        • Product Type:
          Digital Output Module
        • Stock:
          2
        • Backplane (IMB) Supply Voltage:
          20V DC to 32V DC
        • Backplane (IMB) Supply Power:
          27 W
        • Field Supply Voltage:
          18V DC to 32 V DC
        • Field Supply Maximum Current:
          40 A limited to 8 A per power group (TA = 50 °C max) , 30 A limited to 6 A per power group (TA = 60 °C max)
        • Field Supply at maximum power group current. Power Dissipation:
          128 W (TA = 50 °C max), 96 W (TA = 60 °C max)
        • System Supply Power Dissipation:
          27 W
        • Module Location:
          T8100, T8300 I/O Module Slot
        • Power Group to Power Group:
          50V Reinforced (continuous), [Type tested at 1411V DC for 60 s].
        • Field Common:
          50V Reinforced (continuous), 250V Basic (fault) [Type tested at 2436V DC for 60 s].
        • Channel to Channel:
          None
        • Fusing:
          Not user serviceable
        • Number of Outputs:
          40
        • Number of Power Groups:
          5, Each Power Group comprises 8 channels
        • Output On State resistance:
          1.6 Ω
        • Maximum Current Rating (Continuous):
          2 A per channel
        • Minimum On State Load Current:
          50 mA
        • Current Measurement Range:
          0 A to 2.7 A ±5% / ±5 mA7
        • Voltage Measurement Range:
          0V DC to +30V DC ±2V DC
        • Maximum Withstanding:
          -1V DC to +40V DC
        • Channel to Channel Crosstalk:
          < 1%
        • Maximum Load Capacitance:
          3000 μF
        • Output Short Circuit Protection:
          Electronic latching
        • Event Resolution (LSB):
          1 ms
        • Time stamp Accuracy:
          ±10 ms
        • Operating Temperature:
          0 °C to +60 °C (+32 °F to +140 °F)
        • Storage Temperature:
          -25 °C to +70 °C (-13 °F to +158 °F)
        • Relative Humidity – Operating and Storage:
          10% – 95%, noncondensing
        • Weight:
          1.26 kg
        • Estimated shipping dimensions:
          3x30.2x26.3cm
        • 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 Use Cases Operation Standards

        Features:

        • 40 TMR output channels provide fault-tolerant control with continuous diagnostics and monitoring.
        • Integrated line monitoring detects open and short circuit conditions in field wiring and loads.
        • Hot-swappable design with SIL 3 certification ensures high availability in safety-critical environments.
        ICS Triplex T8451C is developed for high-reliability industrial environments where continuous operation and safety integrity are essential. The module combines robust electrical performance with advanced diagnostic capabilities, making it suitable for complex automation systems. With its ability to monitor voltage and current at each channel, ICS Triplex T8451C enhances operational visibility and fault detection. The architecture supports stable performance even under varying load conditions. Integration within Trusted systems ensures compatibility with established safety platforms.

        The design of ICS Triplex T8451C emphasizes both flexibility and protection. Dividing outputs into isolated power groups allows better load management and fault isolation across channels. Each group operates independently, reducing the risk of system-wide failures. Built-in protection mechanisms and reinforced isolation improve resilience against electrical disturbances. The module also supports a wide range of industrial loads, ensuring adaptability across applications. Such features contribute to reliable long-term operation.

        ICS Triplex T8451C also addresses maintenance efficiency and lifecycle management. The ability to perform online replacement reduces downtime and simplifies system servicing. Front-panel indicators provide immediate visual feedback, enabling quick diagnostics in the field. Combined with detailed SOE reporting, operators gain precise insight into system behavior. These capabilities support proactive maintenance strategies and improved system uptime. In demanding industrial sectors, ICS Triplex T8451C delivers consistent and dependable performance.

        The T8451C ICS Triplex TMR 24V 40Ch Digital Output Module (Coated) may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        ICS Triplex T8451C TMR 24V 40Ch Digital Output Module (Coated) 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 T8451C TMR 24V 40Ch Digital Output Module (Coated) Specs

        General

        • Manufacturer ICS Triplex
        • Model T8451C
        • Condition New Original ready stock
        • Product Family T8451,T8461,T8461C
        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.
        • Large Solenoid Valve Array Control in Petrochemical Plants: Specifically designed for centralized triggering and rapid release control of 40 safety shut-off valves (ESD valves) in high-risk hydrogenation units.
        • Safety Venting Interlock for Boiler Gas Systems: In large thermal power units, it serves as a core output component controlling multiple sets of gas electromagnetic vent valves to prevent gas accumulation and potential explosions.
        • Offshore Platform Audible and Visual Alarms and Sprinkler Drives: Used on drilling platforms in harsh environments with high levels of salt spray, linking alarms and fire extinguishing valves in the fire and gas (F&G) system.
        • Steel Plant Blast Furnace Fan Emergency Shutdown System: Performs emergency tripping outputs of the high-voltage electrical switches for the fans without malfunction in environments with high temperature vibrations and conductive dust.
        • Triple Fault-Tolerant Control: Utilizing a unique TMR (Triple Modular Redundancy) 3-to-2 architecture, the output logic continues to execute correctly and without interruption even if a single channel hardware fails.
        • Multi-Channel Concurrent Drive: Supports up to 40 independent output channels, enabling concurrent driving of external 24 Vdc solenoid valves, relays, and indicator lights across all channels.
        • Online Hot-Swap Replacement: Supports live module insertion and removal with seamless replacement; backup cards can instantly take over the current operating state, ensuring uninterrupted production line operation.
        • Real-Time Intelligent Cable Monitoring: Equipped with Automatic Open and Short Circuit Detection (OSSD) functions, enabling milliampere-level micro-current detection of field circuits in both closed and open states.
        • SIL3 Functional Safety Specification: Hardware and firmware design strictly comply with the IEC 61508 international standard, meeting the highest level of SIL 3 integrity requirements for safety instrumented systems.
        • G3 Harsh Environment Resistance: The circuit board surface is 100% coated with industrial-grade anti-corrosion conformal coating, passing the G3 gas erosion test under the ISA-S71.04 standard.
        • Nuclear Power and Special Equipment Standards: The manufacturing process and seismic redundancy meet the nuclear power safety-grade control equipment access specifications, allowing deployment in the periphery of nuclear islands with extremely high reliability requirements.
        • CE and Industrial EMC Calibration: Passes high-intensity radiation and transient burst tests, complying with general industrial heavy-duty electromagnetic compatibility standards such as EN 61000-6-2.
        Description
        The ICS Triplex T8451C belongs to the Trusted range of I/O modules and is engineered to interface directly with field devices in safety-critical control systems. Installed in T8100 or T8300 chassis slots, the module communicates through the Inter-Module Bus (IMB), which supplies 20–32 Vdc power and supports system-level data exchange. With a backplane power consumption of 27 W, ICS Triplex T8451C maintains stable operation under demanding industrial conditions. The module supports field supply voltages from 18 Vdc to 32 Vdc, ensuring compatibility with standard industrial power systems.

        ICS Triplex T8451C provides 40 digital output channels organized into five isolated power groups, each containing eight channels. Each channel supports up to 2 A continuous current, with a minimum load requirement of 50 mA. The module incorporates electronic latching short-circuit protection and allows a maximum load capacitance of 3000 μF. Output performance includes 1.6 Ω on-state resistance and less than 1% channel-to-channel crosstalk, ensuring precise and stable signal delivery. Voltage measurement ranges from 0 to 30 Vdc with ±2 V accuracy, while current monitoring covers 0 to 2.7 A with ±5% tolerance.

        A defining capability of ICS Triplex T8451C is its Triple Modular Redundant (TMR) architecture, where each output channel is driven by three independent switch paths distributed across three Field Interface Units (FIUs). This configuration ensures that even in the event of a single component or slice failure, two operational paths continue powering the load. Diagnostic routines continuously monitor current, voltage, and switching behavior, detecting conditions such as stuck-on or stuck-off faults. Automatic line monitoring identifies both open circuit and short circuit issues in field wiring and connected devices.

        ICS Triplex T8451C integrates Sequence of Events (SOE) reporting with 1 ms resolution and ±10 ms timestamp accuracy, enabling precise tracking of output state changes. Each channel is equipped with front-panel LEDs indicating output status and wiring faults, while additional module LEDs display operational states such as Active, Standby, or Educated. Electrical isolation includes 50 V reinforced isolation between power groups and up to 2500 V impulse withstand capability, enhancing system protection and reliability.

        Operational reliability is further supported by environmental and installation features. ICS Triplex T8451C operates within a temperature range of 0 °C to +60 °C and supports storage from -25 °C to +70 °C with 10–95% non-condensing humidity. The module supports online hot replacement using Companion Slot or SmartSlot configurations, minimizing downtime in continuous processes. Designed for use with Intrinsic Safety Barrier devices, ICS Triplex T8451C is suitable for integration into high-integrity safety systems requiring SIL 3 certification under IEC 61508.
        Alternative Names
        T845IC T8451 T8461 T8461C T8471 T8471C T8472 T8472C
        Technical notes
        The ICS Triplex T8451C is a SIL 3-certified, conformal-coated Trusted TMR digital output module delivering 40 highly supervised 24 Vdc channels with comprehensive line monitoring for critical fail-safe industrial operations.
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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 does ICS Triplex T8451C use TMR architecture?
        Triple Modular Redundant design in ICS Triplex T8451C ensures fault tolerance by maintaining operation even if one channel path fails.
        How does ICS Triplex T8451C detect wiring faults?
        ICS Triplex T8451C performs automatic line monitoring, identifying both open circuits and short circuits through continuous voltage and current measurements.
        Does ICS Triplex T8451C support event logging?
        ICS Triplex T8451C includes onboard Sequence of Events reporting with 1 ms resolution, enabling accurate tracking of output state changes.
        Where should ICS Triplex T8451C be installed?
        ICS Triplex T8451C is installed in T8100 or T8300 I/O module slots and connects to field devices through appropriate cable assemblies and termination units.

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