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T9401

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The ICS TRIPLEX T9401 is an 8-channel, 24Vdc isolated digital input module designed for the AADvance safety controller platform, delivering SIL 3 capability for mid-sized safety instrumented systems (SIS) in emergency shutdown and fire & gas applications.
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Technical specifications for T9401

  • Manufacturer:
    ICS Triplex
  • Part Number:
    T9401
  • Product Family:
    AADvance Controller
  • Product Type:
    Digital Input Module
  • Number of Channels:
    8 (isolated)
  • Nominal Voltage:
    24 Vdc
  • Operating Voltage Range:
    18 – 32 Vdc
  • Backplane Current Draw:
    260 mA max
  • Module Power Consumption:
    3.3 W (typical worst case)
  • Heat Dissipation:
    3.3 W (11.3 BTU/hr)
  • Input On/Off Threshold:
    >16V ON / <8V OFF (nominal)
  • Line Monitoring:
    Open circuit & short circuit detection
  • Input Slew Tolerance:
    See AN-T90001 for filtering requirements
  • Storage Temperature:
    -40°C to +70°C
  • Humidit:
    10% – 95% RH, non-condensing
  • Weight:
    0.36 kg
  • Estimated shipping dimensions:
    3x30.3x26.4cm
  • 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 Operating Environment Safety & Compliance

Features:

  • True SIL 3 Scalability Without Hardware Change
  • Intelligent Field Line Monitoring Reduces False Trips
  • Hazardous Area Ready with Global Certifications
The ICS TRIPLEX T9401 supports simplex, dual (1oo2D), and triple (2oo3D) voting configurations using the same module. This allows you to upgrade from fail-safe to fault-tolerant operation by simply adding identical modules and changing the termination assembly (T9801→T9802→T9803), no application rewrite required.

Each channel on the ICS TRIPLEX T9401 continuously measures input voltage and distinguishes between valid ON/OFF states, open-wire faults, short circuits, and out-of-range conditions. The module reports both digital status and analog voltage value to the processor, giving maintenance teams diagnostic evidence before a nuisance trip occurs.

The ICS TRIPLEX T9401 carries ATEX, IECEx, and UL Class I Division 2 certifications (File E251761), enabling direct installation in Zone 2/Division 2 environments. Combined with an IP54 tool-accessible enclosure, the module meets the strictest requirements for oil & gas, chemical, and power generation sites without external barriers.

The T9401 ICS-TRIPLEX 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 T9401 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 T9401 Digital Input Module

General

  • Manufacturer ICS-TRIPLEX
  • Model T9401
  • Condition New Original ready stock
  • Product Family T9402,T9432,T9802
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 Systems (ESD):The ICS TRIPLEX T9401 monitors field contacts (pressure switches, emergency pushbuttons) and triggers safety actions with SIL 3 integrity. Its dual/TMR capability ensures no single point of failure disables the shutdown function.
  • Fire & Gas Detection (F&G):With line monitoring for open/short circuits, the ICS TRIPLEX T9401 is ideal for smoke detectors, manual call points, and flame sensors. It can distinguish between a genuine alarm and a wiring fault, reducing false plant evacuations.
  • Burner Management Systems (BMS):Boilers and furnaces require fast, predictable input response. The ICS TRIPLEX T9401 provides <5ms update and 1ms SOE timestamping, meeting NFPA 85/86 requirements for flame scanner and limit switch monitoring.
  • Critical Process Interlocks:For high-speed packing lines, compressors, or turbine auxiliaries, the ICS TRIPLEX T9401 offers redundant input voting (1oo2D) to prevent spurious trips while maintaining fail-safe behavior.
  • Temperature Extremes:Operates from -25°C to +60°C (hazardous area) and -25°C to +60°C (non-hazardous), suitable for outdoor cabinets in arctic or desert sites.
  • Humidity & Condensation:10–95% RH non-condensing; conformally coated (MIL-I-46058C) to resist moisture and airborne contaminants.
  • Pollution Degree:Designed for Pollution Degree 2 environments per IEC 60664-1 (typical control rooms and light industrial). Requires IP54 enclosure for Zone 2/Div 2.
  • Vibration & Shock:Withstands 0.5g endurance vibration and 15g shock (11ms half-sine), meeting IEC 61131-2 requirements for skid-mounted or compressor-adjacent installation.
  • Functional Safety (SIL):Certified by TÜV Rheinland to IEC 61508:2010 for use in safety functions up to SIL 3 (simplex, dual, or triple configurations). Baseplate diagnostics achieve >90% safe failure fraction (SFF).
  • Hazardous Locations:ATEX: Ex ec IIC T4 Gc (Zone 2). IECEx: UL 12.0032X. UL: Class I, Division 2, Groups A, B, C, D (File E251761). Requires vertical mounting and 85°C-rated wiring.
  • EMC & Electrical:Tested to EN 61326-1 Class A, EN 61131-2, and EN 54-4. Provides ±1.5kVdc isolation between channels and backplane, eliminating ground loop problems.
  • Environmental Compliance:RoHS compliant; WEEE recycling scheme available through Rockwell Automation. No hazardous substances above threshold limits.
Description
The ICS TRIPLEX T9401 belongs to the Rockwell Automation AADvance® family, a scalable safety controller platform specifically engineered for applications requiring up to SIL 3 (IEC 61508). Unlike the larger Trusted® TMR systems, the ICS TRIPLEX T9401 offers a cost-effective, modular entry into high-integrity control, making it ideal for burner management, boiler control, and distributed safety logic.

Each ICS TRIPLEX T9401 module provides 8 isolated 24Vdc input channels, supporting simplex, dual (1oo2D), or triple (2oo3D/TMR) configurations without changing the base hardware. Comprehensive line monitoring (open-circuit/short-circuit detection) ensures that field wiring faults are detected before they compromise the safety function. The module dissipates only 3.3W, allowing natural convection cooling in IP54 enclosures.

Field engineers value the ICS TRIPLEX T9401 for its hot-swappable design and standardized termination assemblies (T9801 simplex, T9802 dual, T9803 TMR). The module reports both digital state and analog voltage values to the processor, enabling predictive diagnostics and reducing false trips. For global projects, the ICS TRIPLEX T9401 carries ATEX, IECEx, and UL Class I Div 2 certifications, simplifying hazardous area approvals.
Alternative Names
T94O1 T940I T8431 T9402 T9432 T9802 T9852 T9300
Technical notes
The ICS TRIPLEX T9401 operates within the AADvance™ platform, not the Trusted® TMR chassis; it uses a dedicated backplane (T9300) and termination assembly (T98xx series). Ensure firmware revision consistency across T9110 processors when deploying the ICS TRIPLEX T9401 in redundant groups.
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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.
Can the ICS TRIPLEX T9401 be used interchangeably with other I/O modules on the same T9300 host?
The ICS TRIPLEX T9401 can be installed in any slot of a T9300 I/O base unit alongside analog input (T9431/32), digital output (T9451), or analog output (T9482) modules. The AADvance Workbench software automatically configures bus timing.
Which termination assembly should I use for a 2-out-of-3 (TMR) configuration with the ICS TRIPLEX T9401?
For TMR voting, you must use the T9803 termination assembly. It accommodates three ICS TRIPLEX T9401 modules and provides individual field wiring for each channel group. The T9801 (simplex) and T9802 (dual) are not electrically compatible with triple configurations.
How do I access the raw analog voltage value from the ICS TRIPLEX T9401 in my logic?
The ICS TRIPLEX T9401 automatically maps both the digital state (ON/OFF) and the actual measured voltage (0–32V scaled) into the I/O connection structure. In AADvance Workbench, create a variable referencing the channel's RawInputValue parameter for diagnostic trending.
What is the maximum cable length for field wiring to the ICS TRIPLEX T9401?
For reliable line monitoring, keep total loop resistance below 100Ω (approx. 1,200m of 1.5mm² copper). The ICS TRIPLEX T9401 can detect open circuits up to 0.75MΩ isolation, but excessive capacitance may slow fault detection.