TRICONEX 3704E (High-density Analog Input Module · TMR Triple Modular Redundancy) Brand / Series: TRICONEX (A brand under Schneider Electric), Tricon Safety Control System Model: 3704E (V7768-322001 is the spare part number / firmware version number) Type: 64-channel high-density voltage-type Analog Input (AI), TMR triple modular redundancy, SIL 3, designed for high-channel-count voltage signal acquisition. ## I. Basic Parameters Number of Channels: 64 channels, differential, DC-coupled, non-isolated Input Range (Software Selectable): 0–5V DC or 0–10V DC Resolution / Accuracy: 12-bit; ±0.25%FSR (0–60℃) Update Rate: 75ms (all channels) Input Protection: Continuous overvoltage protection of 150VDC/115VAC Operating Temperature: -20℃～+70℃; Storage Temperature: -40℃～+85℃ Power Consumption / Dimensions / Weight: Approx. 6W; 273×213×25mm; Approx. 1.29kg Certifications: CE, UL, FM, CSA, ATEX, IECEx (SIL 3) ## II. TMR Redundancy & Diagnosis Triple Modular Architecture: Triple independent acquisition for each channel, 2-out-of-3 (2oo3) voting logic, single-point fault tolerance. On-board Diagnosis: Input open circuit / short circuit / over-range detection Self-inspection for power supply, internal circuits and voting logic Front Panel LED: PASS/FAULT/ACTIVE status indication Hot Swap: Supports live replacement without system shutdown ## III. Interface & Wiring Connector: 56-pin, matched with dedicated terminal boards (e.g. 9753-240) TriBus: High-speed redundant communication with Tricon main controllers (3501E/3008) Signal Type: Voltage only (0–5V/0–10V), no current (4–20mA) input ## IV. Typical Applications High-channel-count Monitoring: Voltage sensors for temperature, pressure, liquid level, flow rate and other parameters SIS/ESD: Safety Instrumented System, Emergency Shutdown System, Fire & Gas System (F&G) Compatible Series Modules: Main Controller 3501E/3008, DI 3503E, DO 3604E, AI 3721, AO 3805E, Power Supply 8312