TRICONEX 3721 Product Introduction
TRICONEX 3721 is a high-integrity Triple Modular Redundant (TMR) digital output module purpose-built for TRICONEX safety instrumented systems (SIS). Engineered for harsh industrial environments such as oil and gas, petrochemical processing and power generation, this module delivers fail-safe control signals for emergency shutdown (ESD), fire and gas (F&G) systems, and critical safety interlock operations. It adopts a 2oo3 voting mechanism to ensure reliable output execution even under component faults, paired with full galvanic isolation to resist electromagnetic interference. With hot-swappable installation and comprehensive diagnostics, it enables non-disruptive maintenance and consistent fault-tolerant performance for safety-critical actuation tasks.
TRICONEX 3721 Technical Specifications
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Product Model: 3721 (TRICONEX TMR Safety System Series)
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Product Type: TMR Digital Output Module
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Channel Count: 16 isolated digital output channels
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Output Type: Source-type transistor output, 20–32 V DC rated voltage
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Load Current: 100 mA max per channel, 1.2 A total module current
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Redundancy Architecture: 2oo3 TMR voting design for superior fault tolerance
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Isolation: Full galvanic field-to-system and channel-to-channel isolation
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Safety Compliance: IEC 61508 SIL 3 certified for high-integrity safety applications
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Operating Temperature: 0°C to +60°C, industrial-grade rugged design
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Installation: Hot-swappable chassis-mounted design for non-disruptive maintenance
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Diagnostic Features: Real-time output status monitoring, fault detection and LED alarm indication
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Protection: Short-circuit, over-current and reverse polarity protection for stable operation
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