Triconex 3351 TMR Analog Input Module

Technical Specifications

Model:3351(AI3351)

Brand:Triconex

Product Type:TMR triple modular redundant analog input module

Channel Count:32 commoned analog input channels

Signal Range:Nominal 4‑20mA DC,working range 2‑22mA DC,max 50mA DC absolute input

Input Bandwidth:16Hz (-3dB)

Resolution:12‑bit A/D conversion

Accuracy:±0.15%FS @20mA full scale

Input Impedance:250Ω with mating baseplate

Max Field Voltage:33VDC

Isolation:500VDC functional‑earth isolation

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

Diagnosis:Per‑channel open‑circuit,short‑circuit,fault detection

Safety Level:SIL3 IEC61508 TÜV certified

Feature:Hot‑swap supported,hot‑spare standby module compatible,front‑panel PASS/FAULT/ACTIVE/FIELD PWR LED indicator

System Compatibility:Triconex Trident SIS system; mating baseplate 2351 / 2354

Remark:Must install with matched baseplate;legacy EOL spare component

Module Form:Standard rack plug‑in module

Weight:3.00 kg

Dimension:267 mm×107 mm×302 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 SIS safety system,collect 4‑20mA signal from field transmitters,pressure/temperature/flow measurement acquisition,system maintenance and spare‑part replacement.

Product Details

3351 also named AI3351,is TMR triple‑modular‑redundant analog input module for Triconex Trident SIS safety instrumented system. It acquires analog current signals from field transmitters and sends voting‑processed data to main processor.

32‑point common‑reference input design,high‑density channel layout saves cabinet space. Adopts 2oo3 hardware voting mechanism,three independent circuit paths process field signals respectively,single‑path hardware fault will not affect module normal operation. Each channel supports open‑circuit and short‑circuit fault diagnosis,real‑time monitoring field instrument loop status. Supports hot‑spare redundant backup configuration.

Hot‑swap design allows module replacement without SIS system shutdown. Front‑panel multi‑LED indicates module running,fault,active and field power supply status. Must cooperate with dedicated baseplate 2351 or 2354 for field wiring. Widely deployed in petrochemical,oil‑gas and thermal‑power Trident SIS safety racks for mass process analog signal collection.

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