Buyer Support Center

Frequently Asked Questions About Industrial Automation Parts

Clear answers for buyers sourcing PLC, DCS, HMI, TSI, drive, control and other industrial automation parts—including obsolete, discontinued and hard-to-find models.

The written quotation, pro forma invoice and confirmed order requirements define the product supplied. Website information and images are for reference.

01 · Before You Order

Sourcing & Product Identification

Where can I buy obsolete or discontinued PLC parts?

Stockoems sources obsolete, discontinued and hard-to-find industrial automation parts through an established supply network. Send the manufacturer, complete part number, required revision or firmware, quantity, preferred condition and delivery destination. Availability, condition and lead time are confirmed in writing before the order.

Can Stockoems source a part that is not listed on the website?

Yes. Online listings do not represent every available part. Use our contact and RFQ page to send the exact model and technical requirements. We will check availability and provide a written quotation where sourcing is possible.

What information should I include in an RFQ for automation parts?

For a faster and more accurate quotation, provide the manufacturer, full part number including suffixes, hardware revision, firmware or software version, quantity, acceptable product condition, destination country and required delivery date. Clear photos of the existing product label or nameplate are especially helpful when a specific series, revision or date code is required.

How do I verify PLC module compatibility before ordering?

Check the complete part number, suffix, hardware revision, firmware or software version, controller or rack series, communication protocol, power requirements and system documentation. A similar product name does not prove compatibility. Customers are responsible for confirming system compatibility before ordering, but we can compare the information and label photos you provide with the item being quoted.

Are hardware revision, firmware version and product revision the same?

Not necessarily. Manufacturers use different naming systems, and a hardware revision can be separate from the installed firmware or software version. These differences may affect compatibility, features and replacement suitability. State every revision or version requirement in the RFQ and obtain written confirmation before purchase.

Can you help identify a part from a damaged or incomplete label?

We can review clear photos of the product, front and side labels, connectors, rack position and any visible serial, catalog or model information. System information and the original equipment manual may also help. Identification is not guaranteed until the complete product requirement has been confirmed in writing.

02 · What You Receive

Product Condition, Inspection & Trust

Are all Stockoems products brand new and factory sealed?

No. Depending on availability, products may be Brand New, Surplus New, or Used/Refurbished. Packaging condition, date code and included accessories can vary unless specifically agreed. The offered condition is disclosed in the quotation or order confirmation, so please review it before payment.

Is Stockoems an authorized distributor for the manufacturers shown?

Stockoems is an independent reseller and is not an authorized distributor, dealer or representative of the manufacturers displayed on the website. Manufacturer names, product names, trademarks and logos are used only for identification and compatibility reference.

How do you verify a part number and product condition?

Our quality-control process compares the manufacturer, model, suffix, revision and quantity with the purchase order. We inspect the packaging, housing, connectors, terminals, labels, seals and visible storage or use marks. Serial numbers, date codes and revision information are recorded when present and applicable. See the full quality-control process.

Can I request actual product photos, serial numbers, revisions or date codes before shipment?

Yes, product and label photos can be supplied before shipment on request, subject to availability and access to the item. If a particular serial number, revision, firmware, date code, certificate or original sealed package is essential, state that requirement before the order is confirmed.

Are all industrial automation parts functionally tested before shipping?

Not every part can receive the same functional test. Electrical or functional checks are performed where suitable equipment and test conditions are available. The exact test scope depends on the product and can be confirmed before purchase. Identity, visible condition, quantity, accessories, documentation and protective packing are checked before dispatch.

How can buyers reduce counterfeit or misidentification risk?

Use the complete part number, request clear label and product photos, confirm the offered condition and test scope, and compare the revision or firmware with the installed system. Keep the written quotation and order confirmation as the controlling product record. You can also review our company-verification information before ordering.

03 · From RFQ to Delivery

Quotes, Orders & Worldwide Shipping

How quickly can I receive a quotation?

Quotation time depends on product availability and the detail of the technical requirement. Supplying the complete part number, revision or firmware, quantity, condition and destination reduces clarification time. Price, availability, lead time, offered condition and trade terms are confirmed in the written quotation.

How long does order processing take?

In-stock products are normally processed within 1–3 business days after payment, product specifications, shipping address and applicable trade terms are confirmed. Processing may take longer for discontinued, specially sourced, made-to-order or export-controlled products. The estimated dispatch date is stated in the quotation or order confirmation.

Do you ship industrial automation parts worldwide?

Yes. Worldwide shipping is available subject to carrier service, product size and classification, export and import restrictions, destination customs requirements, sanctions and applicable trade regulations. We may decline or modify a shipment where a legal, carrier or customs restriction applies.

Which carriers and Incoterms are available?

Depending on the order, shipment may use FedEx, DHL, UPS, PDE, BRE or another express, air-freight, sea-freight or local logistics provider. International orders are normally supplied under EXW or CPT, as stated in the quotation and interpreted under Incoterms® 2020 unless otherwise agreed in writing.

How are international shipping costs calculated?

International shipping is calculated for each order using the destination and postal code, package weight and dimensions, product classification, carrier and service level, insurance, special handling, applicable Incoterms and destination-specific requirements. The charge and trade terms are shown before payment or shipment.

Can I use my own carrier account, and how long does delivery take?

A customer-approved carrier account may be used subject to confirmation. After dispatch, international express delivery typically takes approximately 3–10 business days, while air, sea, oversized or special freight is confirmed separately. Delivery estimates are not guaranteed because customs, carrier disruption, weather, holidays and other events may cause delays. Read the complete global shipping policy.

04 · After-Sales Support

Warranty, Returns & Quality Claims

What warranty do Stockoems products include?

Unless otherwise agreed in writing, products have a limited warranty for 12 months from the carrier-recorded delivery date. If the quotation, pro forma invoice, sales contract or other written agreement states a different period, that specifically agreed period takes precedence. Review the warranty policy applicable to your order.

Can I return a product if I ordered the wrong model or it is incompatible?

No. Because sales are primarily B2B, returns and refunds are not accepted without a confirmed quality defect. Ordering the wrong model, version, specification or quantity, a change of decision, or incompatibility with the buyer’s equipment, software or operating environment does not by itself qualify. Buyers must verify all technical and compatibility requirements before ordering.

What happens if a product has a confirmed quality defect?

After inspection and verification, we determine the appropriate remedy in this order: inspect and test the product; repair it where reasonably possible; replace it with the same or a reasonably equivalent product if repair is not reasonably possible; or provide an appropriate refund if neither repair nor replacement is reasonably available. A refund is not automatic when a claim is submitted.

How is a suspected quality defect verified?

The product may be inspected and tested by Stockoems, the original manufacturer, or a testing organization or technical service provider designated by us. The review may consider stated specifications, physical condition, serial number, operating conditions, installation, wiring, configuration, use history and available technical evidence. A report of incompatibility or unsuitability alone does not establish a quality defect.

How do I submit a warranty claim or request a return?

Notify us within 7 calendar days after discovering the suspected defect. Provide the order reference, product name and model, serial number, affected quantity, detailed issue description, product and packaging photos, relevant videos, error codes, test results and installation, wiring, power, configuration and operating-condition information. Obtain written authorization and return instructions before shipping anything. Unauthorized returns may be refused. See the complete Return Policy.

Need Help Confirming a Part?

Send the complete part number, quantity, revision or firmware requirement, destination and label photos. We will review the request and confirm the offered product details in writing.

Request a Quote

Last reviewed: August 2026

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