The Triconex 3625A is a 16-point TMR Digital Output module for the Tricon safety system. Providing reliable 24V DC control, it features quad-voter technology and SIL 3 certification for mission-critical fail-safe applications.
The Triconex 3625A is a high-availability digital output module designed for the Tricon Triple Modular Redundant (TMR) safety system. This module is engineered to drive critical final control elements, such as solenoid valves, motor starters, and signaling lamps, which require a 24V DC signal. By utilizing a “quad-voter” circuit architecture, the 3625A ensures that a single hardware failure—whether it be a short circuit or an open circuit—does not result in an unintended state change of the field device. This level of fault tolerance makes the module a standard component for Safety Instrumented Systems (SIS) globally.
Control engineers specify the 3625A because it actively monitors the health of the output circuit while the system is running. The module performs a continuous “Output Voter Test,” which briefly pulses the output switches to verify they can change state without actually cycling the field device. If the module detects a discrepancy between the commanded state and the measured state at the field terminal, it triggers a diagnostic alarm. Because the 3625A supports hot-swapping, maintenance personnel can replace a faulty module without shutting down the process, maintaining the plant’s production continuity while restoring full redundancy.
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