ICS T3491 Regent Multiplexed I/O Modules – Discontinued PLC I/O Module

Technical Dossier

Product Details And Specifications

ICS T3491 Regent Multiplexed I/O Modules: Sourcing Strategy & Asset Value in a Constrained Supply Chain

The ICS T3491 is a legacy Regent-series multiplexed I/O module originally manufactured by Industrial Control Services (ICS) for use in distributed control and safety-critical automation environments — most commonly found in oil & gas processing, petrochemical plants, and heavy industrial facilities. As a discontinued component, the T3491 represents one of the most challenging procurement scenarios for maintenance engineers and plant managers: the OEM no longer supports it, yet the installed base remains operational and replacement is cost-prohibitive.

DriveKNMS specializes in exactly this scenario. We maintain a verified global sourcing network for end-of-life PLC and DCS components, and the T3491 is a unit we actively track. If you are managing an aging Regent system and need to extend its operational life without a full migration, this page is your procurement reference.

Procurement Specifications

Make vs. Buy Decision: Some facilities attempt to repair failed T3491 units in-house. Without OEM schematics and calibration tools, this approach introduces unacceptable risk in safety-rated environments. A tested, warranted replacement from a specialist supplier eliminates that liability.

Global Sourcing Network: We maintain active relationships with surplus dealers, OEM channel partners, and plant decommissioning networks across North America, Europe, and Asia-Pacific. When a T3491 becomes available anywhere in the world, we know about it.

Part Number Verification & Cross-Reference: Regent I/O modules have multiple revision levels and compatible substitutes. Our technical team verifies firmware compatibility, backplane pinout, and revision history before recommending any unit — preventing costly mismatches that generic distributors routinely miss.

Q: How are commercial terms confirmed?
A: Commercial terms are confirmed during RFQ review based on model, quantity, destination, documentation and sourcing route.

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

Q: Can you support multi-unit or repeat RFQ requests?
A: Yes. Send the model list, target quantity and destination so DRIVEKNMS can review sourcing options and quote the requirement as a project RFQ.

Q: What if the T3491 is not compatible with my system revision?
A: Our technical team will review your system configuration and identify compatible alternatives within the Regent I/O family. We do not ship units without confirming compatibility first.