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.