The Triconex 3451 acts as a versatile output interface for auxiliary systems within the Tricon platform. Specifically, the module features 32 output points that are commoned in pairs. Unlike standard TMR output modules, the SRO is a non-triplicated module, making it a cost-effective solution for non-safety-critical points while still benefiting from the Tricon's robust voting logic. The module receives redundant signals from the Main Processors (MPs) across three channels, votes on the data internally, and then drives the individual solid-state relays. Therefore, the Triconex 3451 is the preferred choice for driving status lamps, sirens, and remote annunciators.
Regarding operational reliability, the module features advanced self-monitoring capabilities to ensure point integrity. Specifically, the Triconex 3451 includes a loop-back circuit for every output that verifies the relay switch operation regardless of whether a load is currently connected. Ongoing diagnostics continuously test the status of each of the three internal channels. If a fault is detected, the "FAULT" indicator triggers a system alarm, identifying a channel-specific issue rather than a total module failure. Consequently, the hardware provides a highly transparent output stage that simplifies troubleshooting and maintenance.
The Triconex 3451 is built to handle standard ±24 V signals with high precision and low leakage. For instance, the module maintains a maximum off-state leakage of less than 100 µA, preventing "ghost" signaling in sensitive annunciator circuits. Specifically, each channel supports a maximum nominal current of 0.5 A, with over-current protection up to 0.7 A. To protect the hardware from field-side faults, the associated baseplate includes individual 0.75 A fast-acting fuses for every output. Therefore, the module delivers a rugged electrical interface that protects the internal logic from external short circuits.
Regarding hardware specifications, the Triconex 3451 operates within a voltage range of up to ±30 V, with peak switching capability at ±33 V. Specifically, the module provides strong electrical isolation, with a minimum of 800 VDC between the functional logic and the functional earth. Furthermore, the unit is compatible strictly with the Model 2451 SRO Baseplate, ensuring correct electrical termination and fusing. In addition, the low voltage drop at the baseplate (<0.25 V) ensures that maximum power reaches the field devices. These specifications allow the module to function reliably as a high-density signaling interface.
Specifically, the Triconex 3451 features mechanical keying to prevent improper installation into non-SRO configured baseplates. The module supports hot-spare functionality, allowing for the installation of a redundant module that can take over control without process interruption. Furthermore, the front panel includes diagnostic LEDs that provide immediate visual feedback on module health and channel status. Besides its switching performance, the module is housed in a standard Tricon chassis-mount enclosure for easy integration into existing racks. Finally, the total weight of 2.15 kg reflects the high-quality relays and diagnostic circuitry contained within.
First, verify that the Model 2451 SRO Baseplate is installed and that the 0.75 A fast-acting fuses are in place for all used points. Next, align the Triconex 3451 with the mechanical keys on the baseplate and slide it into the slot until it is fully seated. After that, engage the module's locking levers to ensure a secure backplane connection. Furthermore, verify the field wiring polarity, as the module supports ±24 V operation. Finally, use the TriStation software to monitor the loop-back diagnostics and confirm that all 32 relay points are responding correctly to the Main Processor commands.
1 x Triconex 3451 Solid-State Relay Output Module (32-Point)
1 x Baseplate Compatibility Verification Tag
Shipping Carrier: Fedex, UPS, DHL
Q: Is the 3451 module triplicated like other Triconex modules? Specifically, the Triconex 3451 is a non-triplicated module intended for non-critical points, though it still utilizes voted data from the MPs to drive the relays.
Q: What is the maximum current each channel can switch? Each channel supports a nominal current of 0.5 A, with a maximum over-current limit of 0.7 A.
Q: Can this module detect if a relay has failed if no load is attached? Yes, the integrated loop-back circuit allows the module to verify relay operation independently of the field load.
Q: Which baseplate is required for the 3451 module? The module is strictly compatible with the Model 2451 SRO Baseplate.
Q: Does the module support online replacement? Yes, the Triconex 3451 supports hot-spare modules, enabling maintenance and replacement while the system is powered and active.
| Brand Name | Allen‑Bradley |
| Model No. | Triconex 3501T |
| Product Type | Solid-State Relay Output (SRO) |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
