Emerson SP1406 AC Drive – Obsolete Control Techniques Spare Part

Technical Dossier

Product Details And Specifications

Emerson SP1406 AC Drive – Obsolete Control Techniques Spare Part

When an Emerson SP1406 drive fails on a production line, the consequences extend far beyond the cost of the component itself. The SP Series platform has been discontinued, and sourcing a verified replacement through standard distribution channels is no longer possible. For plant managers operating legacy automation infrastructure built around Control Techniques SP Series drives, a single unplanned failure can trigger a forced system-wide upgrade — a capital expenditure that routinely runs into hundreds of thousands, or millions, of dollars when engineering, rewiring, reprogramming, and production downtime are factored in.

DriveKNMS maintains verified stock of the Emerson SP1406. Securing a spare now is not a procurement exercise — it is an asset protection decision.

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.

The most cost-effective strategy for plant managers facing this situation is a structured spare parts inventory. Holding one or two verified SP1406 units on the shelf eliminates the risk of extended downtime while engineering resources are mobilised. It also preserves the option to defer a full system upgrade until it is planned, budgeted, and executed on the facility's own schedule — not forced by an emergency failure.

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

• Drop-in replacement: The SP1406 is a direct mechanical and electrical replacement for the same model position within an existing SP Series installation. No panel modifications are required.
• No reprogramming required: Parameters can be transferred from the failed unit (where recoverable) or re-entered from existing commissioning records. The drive does not require new PLC logic or software changes.
• Avoids engineering reconstruction costs: Using a verified like-for-like replacement eliminates the need for control system redesign, motor cable upgrades, or HMI reconfiguration — costs that routinely exceed the value of the original installation.
• Preserves production continuity: A stocked spare enables same-shift or next-day restoration of drive function, compared to weeks or months of lead time for a full system upgrade.
• Supports long-term asset lifecycle planning: Holding verified spares allows maintenance teams to schedule system upgrades on a planned basis, aligned with capital budgets and production windows.

FAQ

What warranty applies to a discontinued part?
DriveKNMS provides a 90-day functional warranty on all inspected and tested units. This covers failure under normal operating conditions and excludes damage resulting from incorrect installation or electrical fault conditions external to the drive.

How do I confirm the unit is new or quality-refurbished?
Each unit is accompanied by a condition report detailing its inspection stage results and functional test outcome. Units are classified as New Old Stock (NOS) or Inspected & Tested Refurbished (ITR). Classification is confirmed in writing prior to purchase.

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.

Can DriveKNMS source additional units if I need more?
Yes. DriveKNMS operates an active global sourcing network for discontinued industrial components. Contact us with your quantity requirement and we will advise on availability and lead time.

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