Triconex 3451 SRO Module | 32-Point Relay Output 24V | Schneider

Global PLC Spare HUB's Insight

• The Triconex 3451 serves as a specialized interface for non-critical signaling within high-availability environments.
• While the Triconex system architecture prioritizes TMR, this SRO module offers a practical solution for driving annunciators.
• It effectively bridges the gap between sophisticated logic and standard electrical indicators.
• The internal voting mechanism ensures that the Main Processors maintain control integrity before reaching physical outputs.
• This module is essential for plants requiring reliable status feedback without the cost of fully triplicated hardware.

Product Overview

• The Triconex 3451 is a high-density Solid-State Relay Output (SRO) module for non-triplicated functions.
• It integrates seamlessly with the Triconex platform to handle non-critical points efficiently.
• Each module manages 32 individual relay outputs grouped in pairs.
• This hardware effectively interfaces with external devices incompatible with standard high-side switches.
  

Technical Specifications

• Brand: Schneider Electric / Triconex
• Model Number: 3451
• Series: Triconex Series
• Module Type: Solid-State Relay Output (SRO)
• Output Points: 32 channels commoned in pairs
• Nominal Input Voltage: ±24 VDC
• Operational Voltage Range: ±30 VDC
• Maximum Switching Voltage: ±33 V peak
• Maximum Switching Power: 15 W (Resistive Load)
• Maximum Nominal Current: 0.5 A per channel
• Voltage Drop at Baseplate: <0.25 V at 0.5 A
• Off-State Leakage: <100 µA
• Logic Isolation: 800 VDC minimum (Functional Earth to Logic)
• Protective Isolation: 500 VDC minimum (Functional Earth to PE)
• Fusing: 0.75 A fast-acting fuse per output (mounted on baseplate)

Installation and Compatibility

• The Triconex 3451 module requires the Model 2451 SRO Baseplate for operation.
• Mechanical keying prevents the insertion of the module into incorrect baseplate slots.
• The design supports a hot-spare module configuration for increased availability.
• Each output includes a loop-back circuit to verify relay operation independently.
• The module provides ongoing diagnostics for every internal channel.

Shipping and Warranty

• Packaging List: Includes one Triconex 3451 module in original factory packaging.
• Warranty: Standard 12-month comprehensive warranty coverage applies to all units.
• Dispatch Time: We guarantee shipment within 24 to 48 hours after payment confirmation.
• Courier Services: Fast global delivery via FedEx, UPS, and DHL.

Typical Application Scenarios

• Driving industrial annunciator panels and status light columns.
• Interfacing with non-critical sequence-of-events (SOE) recorders.
• Signaling to third-party control systems or remote monitoring stations.
• Controlling low-power auxiliary relays in non-safety-critical loops.

Purchase Guidance

• Verify your baseplate model is the Triconex 2451 before purchasing this module.
• Assess the load wattage to ensure it stays below the 15W resistive limit.
• Ensure your system software version supports the 3451 hardware revision.
• Consider purchasing a spare module to utilize the hot-spare slot capability.

FAQ

How does the voting mechanism work in this non-triplicated module?

The module receives signals from three Main Processors and performs internal voting before driving the relays.

What happens if a channel fails during operation?

The Fault indicator illuminates and triggers the system alarm while maintaining operation through remaining healthy channels.

Can I use this module for high-speed switching applications?

The 3451 uses solid-state relays suitable for signaling; always check frequency limits for inductive loads.

How do I replace a faulty fuse for this module?

The fuses are located on the Model 2451 baseplate rather than inside the 3451 module itself.

Is the loop-back circuit dependent on the connected load?

No, the diagnostic loop-back verifies the relay status even without an active external load.