Triconex AO3481 TMR Analog Output Module

Technical Specifications

Model:AO3481(3481)

Brand:Triconex

Product Type:TMR triple modular redundant analog output module

Channel Count:4 analog output channels,common‑return DC‑coupled

Output Signal:4‑20mA controlled range,0‑22mA over‑range

Resolution:12‑bit

Accuracy:＜0.25%FSR (0‑70℃)

External Loop Power:Nominal 24VDC,Max 32VDC,reverse polarity protection

Loop Over‑voltage Protection:36VDC continuous

Isolation:No channel‑to‑channel isolation

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

Diagnosis:Loop fault detection,open‑circuit,short‑circuit monitoring

Safety Level:SIL3 IEC61508 TÜV certified

Feature:Hot‑swap supported,front‑panel PASS/FAULT/CHANNEL LED indicator

System Compatibility:Tricon Classic SIS rack

Remark:Must install inside Tricon rack,match Tricon CPU,power supply and backplane;AO3481 is alias designation for 3481,no hardware difference;legacy EOL spare component

Module Form:Standard rack plug‑in module

Weight:2.95 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 safety interlock system,drive 4‑20mA valve positioners,control valves and field actuators,system maintenance and spare‑part replacement.

Product Details

AO3481 is the alias of 3481 TMR triple‑modular‑redundant analog output module for Triconex Tricon Classic safety instrumented system. It converts safety‑logic digital signals into 4‑20mA analog field signals for process control valve and positioner driving.

4‑channel common‑return DC‑coupled output without channel‑channel isolation; adopts 2oo3 hardware voting mechanism,three independent circuit paths control each output,single‑path fault will not produce unsafe output state. 12‑bit resolution,＜0.25% full‑scale accuracy guarantees stable analog control performance. Supports 0‑22mA over‑range output,external loop powered by 24VDC with reverse‑voltage protection.

Hot‑swap design allows module replacement without SIS system shutdown. Front‑panel LED displays module running,fault and channel status,with built‑in loop fault diagnosis function. Widely deployed in petrochemical,oil‑gas and thermal‑power SIS safety racks for safety‑related analog control loop.

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