ICS-TRIPLEX-T8850C
ICS-TRIPLEX-T8850C
ICS-TRIPLEX-T8850C
ICS-TRIPLEX-T8850C
ICS-TRIPLEX-T8850C
ICS-TRIPLEX-T8850C
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T8850C

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The ICS-Triplex T8850C Trusted FTA module reliably and efficiently distributes the output signals of a triple redundancy (TMR) system to field actuators and instruments.
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Technical specifications for T8850C

  • Manufacturer:
    ICS Triplex
  • Part Number:
    T8850C
  • Product Family:
    Trusted Triple Modular Redundant
  • Product Type:
    Field Termination Assembly
  • Stock:
    1
  • Number of channels:
    40 (analog/digital available)
  • Group configuration:
    5 groups, 8 channels per group
  • Power consumption:
    approx. 0.5 W per group
  • Operating temperature:
    0°C ~ +60°C
  • Storage temperature:
    -25°C ~ +70°C
  • Relative humidity:
    10% ~ 95% (non-condensing)
  • Weight:
    0.6 kg
  • Estimated shipping dimensions:
    30x12.5x6.3cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, 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 Application Diagnostics Upgrade Guide

Features:

  • 8-channel 24 Vdc digital output with 2A per channel, electronic short-circuit protection, and 2oo3 TMR voting architecture .
  • Diagnostic feedback for open-wire and short-circuit detection with load current monitoring and hot-swap capability .
  • IEC 61508 SIL 3 certified for ESD and BMS; operates 0°C to 60°C with PASS/FAULT/ACTIVE status LEDs .
The T8850C is built upon ICS Triplex's patented TMR architecture, where three independent output channels are provided for each of the 8 field outputs, and a hardware-based 2oo3 (two-out-of-three) voter determines the final output state. For each field output point, the three internal channels process the command from the controller independently. The voter compares the results; if all three agree, the output is energized or de-energized as commanded.

The T8850C includes extensive onboard diagnostics that continuously monitor the health of each output channel and the connected field wiring. Diagnostic feedback circuits detect open-wire conditions (broken field wiring) and short-circuits between conductors or to ground. When an open-wire is detected, the module reports the fault to the controller, allowing maintenance to be scheduled before the fault affects a safety function. Short-circuit detection immediately reports the condition, and the electronic current limiting prevents excessive current from damaging the output transistor or wiring.

The T8850C is certified to IEC 61508 Safety Integrity Level 3 (SIL 3), the highest level for digital output modules in safety instrumented systems (SIS). This certification confirms that the module meets the rigorous requirements for hardware fault tolerance, diagnostic coverage, and systematic capability required for applications such as emergency shutdown (ESD), fire & gas (F&G) logic solvers, and burner management systems (BMS).

The T8850C ICS TRIPLEX Field Termination Assembly may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

ICS TRIPLEX T8850C Field Termination Assembly Manuals, Datasheets, Drivers, 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 T8850C Field Termination Assembly Specs

General

  • Manufacturer ICS TRIPLEX
  • Model T8850C
  • Condition New Original ready stock
  • Product Family T8830C,T9082U,TC-304-01,TC-306-02
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): Driving safety valves, isolation dampers, and trip solenoids to execute deterministic SIL 3 fail-safe shutdowns when process metrics run out of bounds.
  • Burner Management Systems (BMS): Controlling main and pilot Safety Shutoff Valves (SOVs) for large utility boilers, thermal oxidizers, and gas turbines to guarantee instant flame-failure protection.
  • Critical Process Control (PRC): Running within high-availability zones like offshore platforms, subsea tiebacks, and chemical reactors where false trips are economically damaging and hidden failures are dangerous.
  • Isolated Power Grouping: The 40 output channels are strictly divided into 5 fully isolated Power Groups (8 channels per group). Each group features a dedicated green field power LED indicator. If a field short-circuit or voltage sag crashes one group, the remaining 32 channels remain completely unaffected, and the fault can be quickly identified visually.
  • Per-Channel Fuse Protection: The assembly is board-mounted with 40 independent 2 A fast-acting fuses. Each field loop is fused separately, blocking high electrical fault currents (e.g., a shorted solenoid coil) from reaching the internal system backplane and controllers.
  • SmartSlot Online Hot-Replacement Link: Features an integrated [SmartSlot diagnostic interface (SK1/JDH1)](1.2.3, 1.2.4) that communicates with the active and standby I/O modules. During module maintenance, the configuration software checks slot readiness, enabling bumpless online module hot-swapping without dropping live output states to the field.
  • DIN Rail Mounting: The T8850C is designed to clip securely onto standard TS32 or TS35 DIN rails and can be mounted horizontally or vertically depending on cabinet space.
  • Field Terminations: Supports a 2-wire field execution structure routing out to dual-row, high-density screw clamp terminal blocks (TB2). Terminals accept wire gauges from 12 AWG to 28 AWG. Screw terminations must be tightened to official torque specifications to prevent loose connections over time under high-vibration or high-temperature conditions.
  • ESD and Lockout/Tagout (LOTO): The board contains electrostatic-sensitive components. Before handling, always execute standard Lockout/Tagout (LOTO) field power isolation procedures. Maintenance personnel must wear properly grounded anti-static wrist straps and gloves. Never connect or disconnect the main 96-pin high-density interface cable while the system is energized.
Description
The ICS-Triplex T8850C is a Trusted Field Termination Assembly (FTA) module designed for high-reliability industrial control systems. It stably and efficiently distributes the output signals of Triplex TMR systems to field actuators and instrumentation.

The T8850C features 40 channels, flexibly configurable for analog or digital outputs, and supports various load types, greatly enhancing system adaptability and scalability. The T8850C's internal design follows a triple redundancy (TMR) architecture, ensuring high fault tolerance in critical control paths. It also employs PCB coating protection to enhance resistance to corrosion, humidity, and harsh industrial environments. As an enhanced version of the "C" model, it also features cold-start surge clamp and group-level overvoltage protection (OVP) functions, effectively protecting the module and downstream equipment and ensuring long-term safe and reliable system operation.

The T8850C can be easily installed on standard DIN rails or Triplex output architectures, simplifying wiring and maintenance processes. It is widely used in safety instrumented systems (SIS), emergency stop systems (ESD), and industrial process control scenarios that require high-channel, high-reliability outputs.
Alternative Names
T8830C T8850 T8800 T8830 T8431CX T885OC T9082U T9084U
Technical notes
The T8850C is a Trusted TMR (Triple Modular Redundancy) digital output module providing 8 channels of 24 Vdc output for safety-critical applications . It features 2 amps per channel with electronic short-circuit protection and current limiting . The module operates in a 2oo3 (two-out-of-three) voting architecture, ensuring fault tolerance .
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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.
What is the difference between T8850C and T8850?
T8850C is an enhanced version of T8850 (
What types of loads can T8850C connect to?
It can connect both digital (switch/relay) and analog (voltage/current) loads, as its channels are selectable between analog and digital (software/hardware design).
Does the T8850C each channel have a fuse?
There are no internal fuses; external protection is required depending on the specifications.