Description
Product Overview
TRICONEX 3625C1 is a 24 VDC Triple Modular Redundant (TMR) Digital Output Module used in the Tricon Safety Instrumented System (SIS) platform by Triconex (Schneider Electric / former Invensys). It provides safety-critical digital output control for field devices such as shutdown valves, solenoids, relays, and actuators in high-availability industrial applications.
The 3625C1 is a 32-point supervised or non-supervised digital output module designed for energize-to-trip (ETT) and de-energize-to-trip (DTT) safety applications. It uses Tricon’s TMR architecture, where three redundant processing paths independently control and monitor outputs to provide fault tolerance and continuous operation.
The module is commonly applied in Emergency Shutdown (ESD), Fire & Gas (F&G), Burner Management Systems (BMS), turbine protection, and process safety systems where reliable output actuation is essential.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | TRICONEX 3625C1 |
| Manufacturer | Triconex (Schneider Electric / Invensys) |
| Product Type | TMR Digital Output Module |
| System Platform | Tricon Safety Instrumented System |
| Output Type | 24 VDC digital output |
| Output Channels | 32 points |
| Architecture | Triple Modular Redundant (TMR) |
| Output Mode | Supervised / Non-supervised |
| Nominal Voltage | 24 VDC |
| Operating Voltage Range | 16–32 VDC |
| Maximum Voltage | 36 VDC |
| Maximum Current | 1.7 A per output point |
| Surge Current | Approx. 5–7 A (short duration) |
| Minimum Load | Approx. 10 mA |
| Isolation | High-voltage field isolation |
| Output Monitoring | Voltage/current loopback diagnostics |
| Diagnostics | Open circuit, short circuit, load fault detection |
| Field Applications | ESD, SIS, shutdown control |
| Mounting | Tricon chassis I/O slot |
| Front Panel Color Code | Dark Blue |
Main Features and Advantages
Triple Modular Redundant (TMR) Design
The primary advantage of the TRICONEX 3625C1 is its TMR architecture. Three independent output channels operate together with majority voting, allowing the system to continue operation even if one internal channel experiences a fault.
Benefits include:
- High availability
- Fault tolerance
- Reduced spurious trips
- Improved safety integrity
- Online fault detection
32-Channel 24 VDC Digital Output
The module provides 32 digital output points for controlling external field devices, including:
- Solenoid valves
- Shutdown valves
- Motor contactors
- Relays
- Alarm devices
- Interlock circuits
The outputs are designed for industrial safety applications requiring dependable switching performance.
3625C1
Output Supervision and Diagnostics
The 3625C1 continuously monitors output circuits to detect abnormal conditions such as:
- Open field wiring
- Short circuits
- Loss of field power
- Output switch failures
- Load problems
These diagnostic capabilities help maintenance teams identify faults before they affect plant operation.
Energize-to-Trip and De-Energize-to-Trip Support
The module supports both common safety philosophies:
Energize-to-Trip (ETT):
- Output energizes to initiate a trip action.
De-Energize-to-Trip (DTT):
- Output removal initiates a safe shutdown condition.
This flexibility allows use across different SIS design standards and plant philosophies.
Applications
Emergency Shutdown Systems (ESD)
The TRICONEX 3625C1 is widely used for controlling:
- Emergency isolation valves
- Shutdown solenoids
- Process trip circuits
- Safety interlocks
Oil & Gas Facilities
Typical applications include:
- Offshore platforms
- Refineries
- Gas processing plants
- Pipeline systems
- Compressor stations
Chemical and Petrochemical Plants
Used for safety outputs associated with:
- Reactor protection
- Pressure shutdown systems
- Valve isolation systems
- Process interlocks
Power Generation
Applications include:
- Turbine trip systems
- Boiler protection
- Fuel shutdown systems
- Generator auxiliary protection
Fire & Gas Systems
Used for activation of:
- Fire suppression systems
- Emergency ventilation
- Alarm systems
Related Products
- TRICONEX 3624 — 24 VDC digital output module variant
- TRICONEX 3625 — Base 32-point 24 VDC TMR digital output module
- TRICONEX 3625A — Enhanced version with separated field power groups
- TRICONEX 3503E / 3503EN — Digital input modules
- TRICONEX 3700A — Analog input module
- TRICONEX 3008 — Main processor module
- TRICONEX 4119A — Communication module
