ICS TRIPLEX T8402 Digital Input Module

Technical Specifications

Model:T8402

Brand:ICS TRIPLEX

Product type:TMR 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,16 channels

Input type:Supports NPN / PNP field sensors and dry contact switches

Response time:≤1ms

Operating temperature:0~+60℃

Relative humidity:5~95% non-condensing

Weight:0.40kg

Certification:CE,TÜV,SIL3

System compatibility

This digital input hardware belongs to ICS TRIPLEX Trusted SIS safety instrumented system and installs in T8300 or T8314 expander rack. It collects discrete digital status signals from field switches, proximity sensors and contact devices,transmits validated triplicated input data to expander processor. Widely deployed in oil & gas,petrochemical and chemical plants for ESD emergency shutdown and fire & gas safety protection.

Function

T8402 serves as high integrity 16-channel digital input unit of Trusted TMR SIS. It samples field 24V discrete signals and applies TMR voting logic to determine true input state. Each channel carries continuous diagnostic detection for open circuit,short circuit and signal abnormality. It supports hot swap replacement without powering down the safety rack.

Installation

Insert T8402 vertically into dedicated I/O slot of T8300/T8314 expander chassis. Wire field sensor cables to corresponding terminal assembly. Check channel status and fault alarms via Trusted Workbench engineering software.

Interface

‑Gold finger connector for triple redundant backplane bus

‑Field termination interface for 24V digital input wiring

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

‑Onboard TMR input sampling and channel diagnostic circuit

Circuit feature

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

Feature

T8402 is spare 16-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 to safety workstation.

Built‑in function

Field discrete signal acquisition,per-channel fault monitoring and TMR signal voting for Trusted TMR expansion rack,used as SIS digital input spare replacement.

Product Brief

T8402 is ICS TRIPLEX Trusted SIL3 TMR 16-channel 24VDC digital input module,hot swappable for T8300/T8314 expander chassis. Verify system firmware compatibility before ordering. ESD anti-static protection must be followed during handling installation.