ICS TRIPLEX T8403C Digital Input Module

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Technical Specifications

Model:T8403C

Brand:ICS TRIPLEX

Product type:TMR 40-channel digital input module

System series:Trusted T8000 SIS

Bus type:Triple redundant parallel backplane bus

Compatible modules:T8300 / T8314 expander chassis,T8310 expander processor,T8311 expander interface

Redundancy:TMR triple modular redundant hot swap architecture

Field input:24VDC,40 channels

Input type:Dry contact, NPN / PNP field sensors

Per channel current:2mA

Galvanic isolation:2500V

SOE resolution:1ms

Coating:Conformal coated PCB for harsh environment

Operating temperature:0~+60℃

Relative humidity:5~95% non-condensing

Weight:0.55kg

Certification:CE,TÜV,SIL3

System compatibility

T8403C belongs to ICS TRIPLEX Trusted SIS safety instrumented system and installs inside T8300 or T8314 expander rack. It collects mass discrete digital signals from field safety switches,proximity sensors and relay contacts,transmits triplicated validated input data to expander processor. The conformal coating improves resistance to moisture,dust and corrosive gas for tough industrial sites. Widely deployed in oil & gas,petrochemical and chemical plants for ESD emergency shutdown and fire & gas safety protection.

Function

T8403C serves as high integrity 40-channel digital input unit of Trusted TMR SIS. It samples field 24V discrete signals and adopts TMR 2oo3 hardware voting logic to judge real input status. It supports 1ms high precision SOE sequence of events recording for incident trace analysis. Each channel continuously monitors open circuit and short circuit faults. It supports hot swap replacement without rack power off.

Installation

Insert T8403C vertically into dedicated I/O slot of T8300/T8314 expander chassis. Connect field sensor wiring to terminal assembly. Check channel status and SOE records via Trusted Workbench engineering software.

Interface

‑Gold finger connector for triple redundant backplane bus

‑Field termination interface for 40-channel 24V digital input wiring

‑Front panel LED indicators for per-channel run,alarm and fault status

‑Onboard TMR sampling,channel diagnosis and SOE timestamp circuit

Circuit feature

Conformal coated multi-layer PCB design,built-in surge and overvoltage protection circuit. Triple slice independent signal acquisition and hardware voting design,fully compliant with SIL3 functional safety hardware specifications.

Feature

T8403C is spare coated 40-channel digital input board for ICS TRIPLEX Trusted SIS. Common faults include input channel burnout,field wiring short circuit and backplane contact fault. Confirm field voltage and chassis compatibility before replacement.

Diagnostic

When channel open circuit,short circuit or onboard hardware failure is detected,the module triggers fault alarm and uploads diagnostic messages and SOE event logs to safety workstation.

Built‑in function

Mass field discrete signal acquisition,per-channel line fault monitoring,1ms SOE timestamp recording and TMR signal voting for Trusted TMR expansion rack,used as SIS digital input spare replacement.

Product Brief

T8403C is ICS TRIPLEX Trusted SIL3 TMR conformal coated 40-channel 24VDC digital input module with SOE function,hot swappable for T8300/T8314 expander chassis. Verify system firmware compatibility before ordering. ESD anti-static protection must be followed during handling installation.