Triple modular redundant analog input module, collects 4-20mA field instrument signals, three-channel voting mechanism ensures reliable signal acquisition for safety interlock logic.

Model: 3721 Brand: Triconex Architecture: TMR Signal Type: 4-20mA System: Tricon SIS Certification: SIL3, CE

Three redundant acquisition boards, signal conditioning circuit, status LED and backplane connector. Common faults: signal deviation, channel open circuit alarm, TMR voting mismatch.

3721 analog input module, Triconex Tricon SIS safety spare widely used in petrochemical and power industry process safety monitoring