Emerson SP1406 AC Drive – Obsolete Control Techniques Spare Part

Technical Dossier

Product Details And Specifications

Emerson SP1406 AC Drive – Obsolete Control Techniques Spare Part

DriveKNMS reviews sourcing options for this model through RFQ handling before quotation.

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

Technical Specifications

Note: Electrical parameters (voltage rating, current rating, power output) vary by sub-variant. Confirm your exact nameplate data before ordering. DriveKNMS will cross-reference your unit specifications prior to shipment.

Solving the Discontinued Hardware Crisis

The Emerson SP Series drives were widely deployed across process industries — paper mills, water treatment facilities, material handling systems, and HVAC plant rooms — throughout the 1990s and 2000s. Many of these installations remain operational today, embedded within control architectures that were engineered around the SP platform's specific communication protocols and control logic.

Replacing an SP1406 is not simply a matter of installing a newer drive. Modern replacement drives require re-engineering of the control panel, reprogramming of PLC logic, recalibration of process parameters, and in many cases, updated motor cabling. For a single drive replacement, this engineering overhead can cost more than the original installation. For a facility running multiple SP Series units, the exposure is compounded.

Facilities that have adopted this approach consistently report the ability to extend the operational life of legacy automation assets by five to ten years beyond the point at which spare parts became commercially unavailable. The arithmetic is straightforward: the cost of a verified spare part is a fraction of the cost of an unplanned system upgrade.

Condition & Reliability Assurance

Every SP1406 unit processed by DriveKNMS passes a structured five-stage inspection protocol before it is offered for sale. This process is designed specifically for discontinued industrial components, where age-related degradation is the primary reliability risk.

• Stage 1 – Electrolytic Capacitor Assessment: Capacitor aging is the most common failure mode in drives of this generation. Each unit is inspected for capacitor bulging, leakage, and ESR degradation. Units with compromised capacitors are either reconditioned with matched replacements or removed from inventory.
• Stage 2 – Firmware Version Verification: The installed firmware version is confirmed and documented. Where applicable, compatibility with the customer's existing control system version is verified prior to dispatch.
• Stage 3 – Terminal and Pin Corrosion Inspection: All control terminals, power terminals, and connector pins are inspected under magnification for oxidation, corrosion, and mechanical damage. Affected contacts are cleaned and treated.
• Stage 4 – Functional Power-On Test: Units are powered and tested under controlled conditions to confirm basic drive functionality, fault-free startup, and parameter access.
• Stage 5 – Packaging and Storage Audit: Units are stored in anti-static, humidity-controlled conditions and packaged for transit in accordance with industrial electronics handling standards.

Key Features for System Maintenance

Should I hold more than one unit in reserve?
For facilities operating more than three SP Series drives, holding a minimum of two SP1406 units in reserve is a standard risk mitigation practice. The probability of a second failure during the period required to source a replacement from the secondary market is not negligible, and the cost of a second unplanned outage is identical to the first. A structured spares holding strategy is the lowest-cost form of insurance available for legacy drive infrastructure.