Triconex 3704E TMR Analog Input Module

Technical Specifications

Model:3704E

Brand:Triconex

Product Type:TMR triple modular redundant analog input module

Channel Count:64 common‑ended single‑ended analog input channels

Input Range:0‑5VDC /0‑10VDC software selectable;external 250Ω/500Ω shunt resistor for 0‑20mA current signal

Resolution:12‑bit

Update Rate:75 ms

Accuracy:＜0.25%FSR (0℃‑60℃)

Input Impedance:30kΩ typical DC

Over‑range Protection:150VDC continuous

Isolation:No channel‑to‑channel isolation;field‑to‑system isolation

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

Safety Level:SIL3 IEC61508 TÜV certified

Feature:Hot‑swap supported,per‑group self‑diagnosis,front‑panel PASS/FAULT/ACTIVE LED indicator

System Compatibility:Tricon SIS rack

Remark:Must install inside Tricon rack,match Tricon CPU,power supply and backplane;common‑ended type,field side requires common ground reference;legacy EOL spare component

Module Form:Standard rack plug‑in module

Weight:1.29 kg

Dimension:273 mm×213 mm×25 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 safety interlock system,collect pressure,temperature,flow analog process signals,system maintenance and spare‑part replacement.

Product Details

3704E is high‑density TMR triple‑modular‑redundant analog input module for Triconex Tricon safety instrumented system,64‑point single‑ended common‑ended input greatly saves cabinet slot space.

Adopts 2oo3 hardware voting mechanism,each signal processed by three independent circuit paths,single‑path fault will not affect safety signal acquisition. Voltage range 0‑5V /0‑10VDC selectable by TriStation software;external shunt resistor can convert 0‑20mA current signal into voltage signal for acquisition.

It is common‑ended design without channel‑channel isolation,field sensors need to share common ground reference. Hot‑swap design allows module replacement without SIS system shutdown. Front‑panel LED indicates module running,fault and group channel status. Widely deployed in petrochemical,oil‑gas,thermal‑power SIS safety interlock racks for mass analog signal acquisition.

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