Allen-Bradley 1746-NO4V SLC Analog Output Module – Obsolete SLC 500 Spare Part

Technical Dossier

Product Details And Specifications

Allen-Bradley 1746-NO4V SLC Analog Output Module – Obsolete SLC 500 Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Solving the Discontinued Hardware Crisis

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

The 1746-NO4V specifically handles voltage analog outputs, driving actuators, variable-speed drives, and control valves that are calibrated to the existing SLC program. Replacing this module with a non-drop-in alternative requires analog scaling changes in ladder logic, re-calibration of field devices, and in many cases, a full Factory Acceptance Test. None of that is free.

How to extend your SLC 500 asset life by 5–10 years at low cost:

Condition & Reliability Assurance

Every 1746-NO4V unit shipped by DriveKNMS passes a documented 5-step inspection protocol before dispatch:

Key Features for System Maintenance

• Drop-in replacement: The 1746-NO4V installs directly into any SLC 500 chassis slot. No wiring changes, no program modifications, no re-commissioning of field devices.
• No re-programming required: The module communicates over the SLC backplane using the same data file structure as the original. Your existing ladder logic addresses remain valid.
• Avoids engineering reconstruction costs: A verified replacement module eliminates the need for a change management process, P&ID revision, or control narrative update — all of which are mandatory steps in a platform migration.
• Supports 24/7 production environments: Spare availability means maintenance teams can execute a module swap during a scheduled micro-shutdown rather than an unplanned line stop.

How do I confirm the unit is genuine and not counterfeit?
All units are sourced through established industrial surplus and OEM channels. Catalog number, series letter, and date codes are verified against Rockwell documentation. We do not sell units where provenance cannot be established.

Should I buy more than one unit?
For any SLC 500 system running a continuous process, holding a minimum of two 1746-NO4V spares is a defensible maintenance strategy. Global inventory of this module is finite and declining. The cost of a second spare is fixed; the cost of a future emergency sourcing event is not.

Can you supply other SLC 500 modules?
Yes. DriveKNMS specializes in obsolete and hard-to-find Allen-Bradley, Siemens, ABB, Honeywell, and Schneider Electric industrial components. Contact us with your full BOM for a consolidated quote.