Overview

The TRICONEX RO3451 Relay Output Module is a high-integrity control output module for Triconex safety instrumented systems (SIS). It provides electrically isolated and reliable outputs for mission-critical applications. Each of the 32 channels is independently driven and monitored, ensuring precise actuation of field devices while maintaining system integrity.

The RO3451 supports triple modular redundancy (TMR) with a voting mechanism that enhances fault tolerance and output reliability. It also features hot-swap capability, allowing for online replacement without system interruption. Therefore, it is widely used in emergency shutdown systems, fire and gas protection, and high-integrity process control.

For instance, in a petrochemical plant, the RO3451 can control shutdown valves and audible alarms, ensuring rapid and safe response during abnormal conditions.

Technical Data

Typical Applications

• Emergency Shutdown Systems (ESD): Controls final elements such as shutdown valves and relays in hazardous process areas.

• Fire and Gas Systems (F&G): Activates alarms, beacons, and suppression systems in response to fire or gas detection.

• High-Integrity Pressure Protection Systems (HIPPS): Provides output control for pressure relief and isolation devices.

• Power Generation and Utilities: Interfaces with turbine trip systems and auxiliary safety controls.

• Chemical and Refining Plants: Drives interlocks, contactors, and safety relays for process control and protection.

The RO3451 is also commonly deployed in offshore platforms and nuclear facilities where system availability and fault tolerance are critical.

FAQ

Q1: What type of outputs does the RO3451 provide?
A1: It provides 32 Form A (SPST-NO) relay outputs with dry contact switching.

Q2: Is the module hot-swappable?
A2: Yes, it supports online replacement without shutting down the system.

Q3: What is the maximum load per channel?
A3: Each channel supports up to 2 A at 30 VDC or 250 VAC for resistive loads.

Q4: Does it support redundancy?
A4: Yes, it uses triple modular redundancy (TMR) with a voting mechanism for fault tolerance.

Q5: What kind of field devices can it control?
A5: It can drive solenoids, alarms, contactors, motor starters, and other discrete actuators.