Product Description

The Triconex 3704E is a high-density analog input module designed for the Tricon Triple Modular Redundancy (TMR) safety platform. Featuring 64 commoned input points, this module is ideal for large-scale signal acquisition where space efficiency and fault-tolerant reliability are critical. Signals are processed through three independent, isolated paths, ensuring continuous mission-critical logic execution even if a single hardware failure occurs.

Designed for SIL 3 safety systems, the 3704E combines high channel density with the robust fault-tolerant architecture of Tricon TMR controllers.

Key Features

• 64 commoned analog input channels in a single slot for high-density monitoring

• Selectable voltage ranges: 0–5 VDC or 0–10 VDC with 6% overrange headroom

• Triple Modular Redundant (TMR) 2-out-of-3 (2oo3) voting logic for fault-tolerant operation

• Compact, space-saving design for large-scale installations

• Easy visual identification via copper-colored handle for correct chassis placement

Technical Specifications

Applications

• High-density monitoring of non-isolated industrial sensors

• Safety Instrumented Systems (SIS) requiring high channel count

• Large-scale process control in petrochemical, chemical, and power generation facilities

• Emergency Shutdown (ESD), Burner Management Systems (BMS), and Fire & Gas (F&G) applications

• Compact installations requiring efficient use of rack space