TRICONEX 2301 safety-grade digital input (DI) module
The TRICONEX 2301 is a safety-grade digital input (DI) module developed by Triconex (a brand under Rockwell Automation), exclusively designed for Triconex Triple Modular Redundancy (TMR) safety control systems. It specializes in collecting on-site safety-related digital signals (such as dry contact or low-voltage signals from emergency devices) and converting them into stable digital data for the safety controller. As a front-end data acquisition component of Safety Instrumented Systems (SIS), it ensures accurate capture of critical status signals in high-risk industries, laying a foundation for reliable safety interlock logic execution. Below is its detailed information:
TMR Redundant Design & SIL 3 Compliance
- Integrates with Triconex’s signature Triple Modular Redundancy (TMR) architecture. Three independent signal acquisition channels process the same on-site input in parallel, and validate data via a 2-out-of-3 (2oo3) voting mechanism. This design automatically masks single-channel faults (e.g., circuit drift, interference-induced errors) to avoid false alarms or missed safety triggers caused by signal inaccuracies.
- Meets strict 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 core safety input loops, such as emergency stop (E-Stop) signal collection and fire detector status monitoring.
Dual-Type Input Compatibility
- Supports two mainstream industrial digital input formats, eliminating the need for additional signal converters and adapting to most on-site safety devices:
- Dry contact input: Compatible with normally open (NO) or normally closed (NC) dry contacts, used for devices like emergency stop buttons, limit switches, and signal valves. It detects contact "on/off" states to reflect device working conditions.
- Low-voltage signal input: Optimized for 24V DC voltage signals (common in industrial automation), suitable for sensors like photoelectric switches or proximity sensors. It identifies signal states through voltage presence (e.g., 18–30V DC = "active", 0–5V DC = "inactive").
- Each channel supports independent software configuration (e.g., contact type, voltage threshold), flexibly matching the signal characteristics of different on-site devices.
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