TRICONEX DO2401 safety-grade digital output (DO) module
The TRICONEX DO2401 is a safety-grade digital output (DO) module developed by Triconex (a brand under Rockwell Automation), exclusively designed for Triconex Triple Modular Redundancy (TMR) safety control systems. It converts digital control commands from safety controllers into on/off signals to drive on-site executive devices—such as solenoid valves, contactors, and alarm buzzers—ensuring reliable execution of safety interlock actions (e.g., emergency shutdown, equipment isolation) in high-risk industrial environments. It is a core component of Safety Instrumented Systems (SIS) and widely used in sectors like petroleum, chemicals, and power. Below is its detailed information:
TMR Redundancy & SIL 3 Safety Compliance
- Adopts the Triple Modular Redundancy (TMR) architecture consistent with Triconex safety systems. Three independent output channels process the same digital control command in parallel and implement a 2-out-of-3 (2oo3) voting mechanism. This design automatically shields single-channel faults (e.g., relay sticking, circuit open) to avoid incorrect on/off actions, preventing safety accidents caused by module failures.
- Fully meets international safety standards: TÜV-certified SIL 3 (Safety Integrity Level 3), compliant with IEC 61508 (general safety standard) and IEC 61511 (process industry safety standard). It is suitable for critical safety loops requiring "zero false operation" and "zero missed operation" (e.g., emergency shutdown of chemical reactors, fire protection system activation).
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Triconex
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