Triple modular redundant digital input module, collects 115VAC/DC discrete contact signals, optical isolation per channel, three-way voting logic ensures reliable signal acquisition for emergency shutdown and fire gas interlock.

Model: 3501T Brand: Triconex Channels: 32 Input Voltage: 115V AC/DC Architecture: TMR Isolation: Opto-isolated System: Tricon SIS Certification: SIL3, CE

Three redundant signal boards, optocoupler isolation circuit, channel status LED and backplane connector. Common faults: channel open circuit alarm, inconsistent TMR voting, signal sampling failure.

3501T digital input module, Triconex Tricon SIS safety spare widely used in petrochemical, oil & gas and power safety interlock monitoring.