Triconex 3503E TMR Digital Input Module

Technical Specifications

Model:3503E

Brand:Triconex

Product Type:TMR triple modular redundant digital input module

Channel Count:32 digital input channels,grouped by 8 channels per group

Input Signal:24V AC/DC,dry contact / wet contact compatible

Input Voltage Range:20‑42.5V AC/DC(Nominal 24V)

Frequency Range:DC,47‑63Hz AC

On‑threshold:＞15V‑18V;Off‑threshold:＜5V‑6V

Isolation:1500VDC group‑to‑system isolation

Architecture:2‑out‑of‑3 TMR voting,three independent signal processing paths

Safety Level:SIL3 IEC61508 TÜV certified

Feature:Hot‑swap support,comprehensive self‑diagnosis,stuck‑on fault detection,front‑panel LED indicator

System Compatibility:Tricon SIS safety system rack

Remark:Must install inside Tricon rack,match Tricon CPU,power supply and backplane;legacy EOL spare component

Module Form:Standard rack plug‑in module

Weight:4.0 kg

Dimension:490 mm×453 mm×68 mm

Protection Grade:IP20

Certification:SIL3,TÜV,CE

Working Temperature:‑40℃ ~ +70℃,non‑condensing

Storage Temperature:‑40℃ ~ +85℃

Humidity:5%‑95% non‑condensing

Application:Petrochemical,oil & gas,power plant ESD emergency shutdown,F&G fire‑gas,BMS burner management safety interlock system,collect field switch signal,system maintenance and spare‑part replacement.

Product Details

3503E is high‑density TMR triple‑modular‑redundant digital input module for Triconex Tricon safety instrumented system. It collects 32‑point field discrete switch signals,adopts 2oo3 hardware voting mechanism,each signal processed by three independent circuit paths,single‑channel fault will not cause system mis‑operation or signal loss.

Supports dry‑contact and 24V AC/DC wet‑contact input,group isolation design,built‑in stuck‑on dangerous fault detection and continuous background self‑diagnosis function. Hot‑swap design allows module replacement without SIS system shutdown. Front‑panel LED displays PASS,FAULT,ACTIVE and test status.

Mainly used for collecting field interlock switch,fire‑gas sensor,valve feedback and other discrete signals for safety‑critical loop. Widely deployed in petrochemical,oil‑gas,thermal‑power SIS safety interlock racks.

Note:This is legacy EOL spare component,widely used for safety system spare‑part replacement.