TRICONEX 3625A TMR SIL 3 Supervised Digital Output Module

Description

Brand‌: TRICONEX (Schneider Electric EcoStruxure Tricon Safety Automation)
‌Model‌: 3625A
‌Official Full Title‌: TRICONEX 3625A TMR SIL 3 Supervised Digital Output Module for Tricon/Tricon CX Safety Instrumented Systems

Product Description

The TRICONEX 3625A is a fault-tolerant, TMR-voted supervised digital output module purpose-built for safety-critical industrial applications, delivering full loop diagnostic coverage for high-integrity discrete signal execution. Designed as the upgraded generation of the 3625 digital output series, it integrates dedicated voltage and current loopback circuitry to verify the entire output circuit from module terminal to field actuator, eliminating blind spots in traditional digital output monitoring. Fully compatible with Tricon and Tricon CX main/expansion chassis, it supports hot-swappable online maintenance without system shutdown, making it ideal for ESD, F&G and other high-risk safety loops that demand 100% output integrity.

TRICONEX 3625A

Technical Specifications

• ‌Output Channels‌: 32 independent sinking digital output channels
• ‌Nominal Operating Voltage‌: 24 VDC
• ‌Supported Voltage Range‌: 16–32 VDC, maximum 36 VDC
• ‌Logic Power Consumption‌: <13 watts
• ‌Per-Point Current Rating‌: 1.70 ±10% A/point; 5 A surge for 7 ms
• ‌Total Module Output Current‌: 10 A per matched termination panel
• ‌Minimum Required Load‌: 10 mA
• ‌Maximum Output Leakage‌: 2.0 mA @ 24 VDC; 2.5 mA @ 32 VDC
• ‌System-to-Field Isolation‌: 1,500 VDC minimum
• ‌Maximum Output Toggle Rate‌: 60 ms
• ‌Safety Certification‌: IEC 61508 SIL 3 certified
• ‌Physical Indication‌: Dedicated LED status indicators for module health, channel active status, voting results and diagnostic alarms (Pass/Fault/Load/Active)

Main Features and Advantages

1. ‌Full Loop Supervision & Diagnostics‌
   Built-in voltage and current loopback circuitry verifies the entire output circuit, enabling real-time detection of open circuits, short circuits and abnormal load conditions that traditional non-supervised modules cannot identify.
2. ‌TMR 2-out-of-3 Fault-Tolerant Voting‌
   Patented triple modular redundant majority voting logic ensures output signal integrity, guaranteeing correct actuator control even if one output channel experiences a fault.
3. ‌Per-Channel Configurable Operation Modes‌
   Each individual channel can be independently set to supervised or non-supervised output mode, adapting flexibly to different field actuator monitoring requirements.
4. ‌Inductive Kick-Back Self-Protection‌
   Integrated output protection automatically suppresses inductive kick-back from solenoid valves and motor loads, eliminating the need for external fuses and improving long-term operational reliability.
5. ‌Zero-Downtime Hot-Swap Design‌
   The module supports online replacement without system shutdown or safety loop isolation, drastically reducing planned maintenance downtime and avoiding unplanned production interruption risks.

TRICONEX 3625A

Application Fields

• Safety-critical industrial applications requiring high-integrity discrete signal execution with full loop diagnostics
• Oil and gas onshore/offshore ESD emergency shutdown solenoid valve control loops
• Petrochemical and chemical plant fire & gas (F&G) system alarm and actuator control
• Thermal power generation turbine safety protection and burner management system output control
• Hazardous zone classified industrial installations requiring SIL 3 certified supervised digital output performance
• Industrial sites that demand full visibility of the entire field output loop status for safety compliance

Related Product Recommendations

• TRICONEX 3625 Non-Supervised TMR Digital Output Module
• TRICONEX 3625C Enhanced Supervised Digital Output Module
• TRICONEX 3721 TMR 32-Channel Differential Analog Input Module
• TRICONEX 3009A Tricon TMR High-Performance Main Processor Module
• TRICONEX 8312 230VAC TMR Safety Power Supply Module

Installation and Maintenance

1. ‌Pre-Installation Validation‌
   Confirm the 3625A 24VDC output rating matches your field actuator operating specification before wiring, avoid connecting loads that exceed the 1.7A per-channel continuous current limit to prevent permanent channel damage.
2. ‌Rack Mounting Procedure‌
   Align the module with the designated Tricon/Tricon CX backplane slot, push firmly until the locking latch clicks into place, then tighten the captive mounting screws to ensure stable electrical contact.
3. ‌Field Wiring Best Practice‌
   Use shielded cables for all field output wiring, separate high-power output cables from low-voltage analog signal cables to minimize electromagnetic interference, and confirm all wiring meets the 1500VDC isolation safety requirements.
4. ‌Routine Preventive Maintenance‌
   Conduct periodic inspections to verify all front-panel status LEDs show normal operation, check field wiring terminals for loose connections, and confirm the minimum 10mA load requirement is met for every supervised channel.
5. ‌Fault Troubleshooting & Replacement‌
   When a diagnostic fault alarm appears in the system interface, first verify field loop integrity for open/short circuit issues. Confirm the remaining two TMR output channels are fully operational before initiating hot-swap replacement, and validate all connected actuators return to normal state after the new module is seated.
6. ‌Spare Part Management‌
   Store backup 3625A modules in a temperature-controlled ESD-safe industrial cabinet, and perform annual bench functionality validation on spare units to guarantee immediate operational readiness when on-site replacement is required.