TRICONEX 3623 – TMR 24 VDC Discrete Output Module for Safety-Critical Shutdown Control

Emergency Shutdown (ESD) and High-Integrity Protective Functions in oil & gas and petrochem.

Fire & Gas systems that need deterministic control of beacons, sounders, and deluge solenoids.

Boiler/BMS and burner management where proof-testing and online diagnostics save turnaround time.

Turbomachinery and compressor protection where fast, clean 24 VDC actuation is essential.

Power generation balance-of-plant interlocks and process shutdown sequences.

High availability – TMR design maintains control through single faults and aids rapid root cause isolation.

Lifecycle-friendly – Hot-repair support and modular field terminations reduce outage duration and spares exposure.

Proven compatibility – Works within the Tricon ecosystem alongside existing processors and communication modules.

Cost control – In many cases, the 3623 lets you keep 24 VDC at the field, minimizing interposing hardware and wiring complexity.

Safety performance – SIL3 capability when applied per IEC 61508 simplifies functional safety justifications.

Panel environment – Install in a Tricon chassis inside a well-ventilated cabinet; maintain clear airflow and stable 24 VDC supply quality.

Wiring practices – Segregate safety I/O from noisy power runs, use ferrules, label rigorously; add flyback diodes for inductive loads unless handled by the ETA.

Load ratings – Match output current and inrush limits; for higher loads, drive interposing relays rated for the duty.

Proof testing – Periodically function-test outputs and final elements per the safety plan; capture timestamps in your SIS maintenance records.

Hot-repair – Replace modules using the manufacturer’s online maintenance procedure; verify leg health and output permissives before returning to service.

Firmware/config management – Keep a controlled baseline of system firmware and configuration; update only under MOC with rollback plans.

IEC 61508 SIL3 certification when used in a TRICONEX system and applied per the safety manual.

CE compliance for EMC and low-voltage directives (typical for Tricon modules).

UL/CSA industrial control equipment listings in many configurations.

RoHS-conscious design where applicable.

Manufacturer warranty: typically 1 year; extended service agreements available through lifecycle support programs.

TRICONEX 4351B Tricon Communication Module (TCM) – Handles peer-to-peer and host connectivity for the Tricon system, letting you keep the 3623 focused on deterministic I/O.

TRICONEX 3503E Main Processor (MP) – High-availability CPU module executing the safety logic and coordinating I/O voting across A/B/C legs.

External Termination Assemblies (ETAs) for 24 VDC DO – Field wiring interface boards matched to the 3623; choose versions with integral fusing or surge suppression depending on load type.

Interposing relay boards – Recommended where loads exceed the electronic output’s rating or require galvanic isolation from field power.