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Description
Triconex 3625A
(Digital Input Module for Safety Instrumented Systems)
Product Overview
The Triconex 3625A is a digital input module designed for Schneider Electric’s Tricon and Trident safety systems. It provides fault-tolerant, high-integrity input processing for critical industrial applications such as emergency shutdown (ESD), fire and gas systems, and turbine control. Compliant with IEC 61508 SIL 3 standards, this module ensures reliable monitoring of field devices (e.g., switches, sensors) in oil and gas, chemical, and power generation industries.
Key Features
- Redundant Architecture: Triple Modular Redundant (TMR) design for fault tolerance and voting logic.
- Input Compatibility:
- 24 VDC or 48 VDC dry/wet contact inputs.
- Supports NAMUR sensors for hazardous areas.
- Diagnostics: Continuous monitoring for open circuits, short circuits, and signal integrity.
- Hot Swap: Replaceable without system downtime.
- Certifications: ATEX/IECEx (optional), UL, CE.
Technical Specifications
| Parameter | Details |
|---|---|
| Channels | 16 digital inputs |
| Input Voltage | 24/48 VDC (configurable) |
| Isolation | 1,500 VAC (channel-to-system) |
| Response Time | ≤10 ms per channel |
| Power Supply | 24 VDC via Tricon chassis |
| Operating Temp | -40°C to +70°C |
| Enclosure | IP20 (rack-mounted) or IP66 (harsh environments) |
Application Areas
- Emergency Shutdown (ESD): Monitors safety switches and pressure sensors in pipelines.
- Fire & Gas Systems: Detects flame or gas detection alarms.
- Turbine Protection: Tracks overspeed or vibration trip signals.
- Process Interlocks: Safeguards reactors and pumps via permissive logic.
Installation & Configuration
- Mounting: Installs in a Tricon V9/V11 chassis or Trident cabinet.
- Wiring: Uses shielded cables; terminals support 12–24 AWG.
- Programming: Configured via TriStation 1131 software for debounce filtering and alarm thresholds.
- Testing: Validate with simulated inputs to ensure SIL 3 compliance.
Related Products
- Triconex 3626X: Digital output module for actuator control.
- Triconex MP3008: Main processor for Tricon CX systems.
- Triconex 4351B: Analog input module for SIL 3 applications.
- Trident Safety System: Modern platform for next-gen safety logic.
Why It Matters
The 3625A ensures fail-safe operation by accurately monitoring critical signals in high-risk environments. Its TMR design minimizes spurious trips and guarantees operational continuity, aligning with global safety standards like API 670 and IEC 61511.
Product Assurance
- Warranty: 5-year lifecycle support with firmware updates.
- Compliance: Meets IEC 61508/61511, ANSI/ISA 84, and NAMUR NE 43.
- Support: Access Schneider Electric’s 24/7 Critical Care Support for urgent troubleshooting.
For technical details, refer to Triconex Manual D042741 or contact Schneider Electric’s Process Safety Team. Always validate configurations with HAZOP/LOPA studies.
Note: Legacy modules like the 3625A may require migration to Tricon CX or Trident for enhanced features.
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