Product Overview

The Triconex 3636R is a high-integrity Relay Output Module designed for use within the Triple Modular Redundant (TMR) architecture of the Tricon safety system. This module provides 32 independent, non-commoned Single-Pole Double-Throw (SPDT) relay outputs, offering a versatile interface for switching both AC and DC loads. Engineered for safety-critical applications, the 3636R facilitates galvanic isolation between the controller logic and field circuitry, protecting the system from electrical transients. By leveraging triplicated internal logic and hardware voting, the module ensures that critical control commands are executed with the highest level of availability and fault tolerance, making it a staple in SIL 3 rated safety loops.

Technical Specifications and Hardware Architecture

The 3636R is built to provide robust switching performance and comprehensive diagnostics for demanding industrial electrical environments.

• Output Configuration: 32 isolated SPDT (Form C) relay points.

• Redundancy Logic: Triple Modular Redundant (TMR) circuitry with internal hardware voting.

• Switching Capacity: Designed to manage a variety of current loads for interposing relay or direct actuator control.

• Environmental Resilience: Operational stability within a wide thermal gradient, ensuring performance in unconditioned control rooms.

• Isolation: High-level galvanic separation between field-side contacts and logic-side electronics.

• Status Monitoring: Integrated LED indicators for active channel tracking and fault detection.

Strategic Industrial Implementations

The 3636R module is utilized in complex automation scenarios where mechanical dry-contact switching is preferred for signal clarity and isolation.

Emergency Shutdown (ESD) SystemsIn oil and gas upstream facilities, the 3636R provides the fail-safe contact closure required to actuate master valves and isolate high-pressure flow lines. Its TMR architecture ensures that the safety function is never compromised by a single point of failure.

High-Voltage Interposing LogicThe module acts as a reliable interface between the low-voltage Tricon logic and high-voltage motor control centers (MCC). By using the SPDT relays to drive larger contactors, the 3636R allows the safety system to manage heavy industrial motors and pumps securely.

Fire and Gas (F&G) System NotificationUsed to trigger audible and visual notification appliances across a plant. The 3636R manages the activation of sirens, strobes, and fire suppression release solenoids, ensuring these critical life-safety devices operate precisely when a hazard is detected.

Nuclear Power Control Rod DriveIn nuclear energy applications, the 3636R is frequently applied to safety-related logic where isolated relay contacts are required for control rod positioning and reactor protection feedback loops, adhering to the most stringent safety standards.