TRICONEX Tricon Digital Input Modules 3502EN2

Technical Dossier

Product Details And Specifications

TRICONEX Tricon Digital Input Module Series Technical Notes

The TRICONEX Tricon Triple Modular Redundancy (TMR) platform is the dominant safety-rated control architecture deployed across global heavy industry. Tricon systems are certified to IEC 61511 SIL 3 and are the standard of record in petrochemical complexes, nuclear power generation facilities, LNG terminals, offshore platforms, and refinery critical process units. The 3502EN2 is a 24 VDC digital input module within the Tricon I/O subsystem, designed for field-side signal acquisition in high-availability safety instrumented systems (SIS). Its TMR architecture ensures no single-point failure can compromise system integrity, making it a mandatory component in facilities where process shutdown must be deterministic and auditable.

Tricon Full Catalog & Functionalities — SKU List

Digital Input Modules (DI)

Digital Output Modules (DO)

• 3601E: 16-channel 24 VDC digital output module, solid-state, TMR voted output
• 3603E: 16-channel 120 VAC digital output module, relay-isolated field side
• 3604E: 16-channel 240 VAC digital output module, high-voltage DO
• 3625: 16-channel 24 VDC DO, earlier generation, discrete relay output

Analog Input Modules (AI)

• 3700A: 8-channel analog input module, 4–20 mA, 12-bit resolution, TMR
• 3703E: 8-channel AI, 4–20 mA / 1–5 V, enhanced diagnostics, SIL 3
• 3704E: 8-channel AI, thermocouple/RTD input, cold junction compensation
• 3706A: 8-channel AI, high-speed analog input, 16-bit resolution

Analog Output Modules (AO)

• 3805E: 8-channel analog output, 4–20 mA, TMR voted, loop-powered field side

Communication & CPU Modules

• 4351B: Tricon Main Processor Module (MP), dual-redundant CPU, Tricon 3000 chassis
• 4119A: Tricon Communication Module (TCM), Ethernet/Modbus gateway
• 4329A: Enhanced Intelligent Communication Module (EICM), multi-protocol