On this page
- Choose the published European reference
- What the document addresses
- Separate the three supplier responsibilities
- Questions that reveal an incomplete quotation
- Example: a packaging-machine access door
- Define the document package before ordering
- Frequently asked buying questions
- Related guidance
- Explore more standards buying guides
Choose the published European reference
What the document addresses
The public catalogue scope covers principles for interlocking devices associated with guards, including measures to minimise foreseeable defeat. It distinguishes guard construction and control-signal processing from this device subject. The European publication adopts ISO 14119:2024; the two publication years therefore differ.
For a buying brief, describe what a person opens, why they open it and what happens before access. A small adjustment door and a large maintenance entrance may require different discussions even when a supplier proposes the same switch family. Record who can resolve those questions before inviting quotations.
Separate the three supplier responsibilities
| Assignment | Information to request |
|---|---|
| Device selection | Exact device, actuator, accessories and the intended access arrangement. |
| Mechanical installation | Drawings identifying mounts, alignment, doors and responsibilities for alterations. |
| Control integration | Named owner of the machine response, configuration and associated evidence. |
| Operational use | Instructions covering access tasks, replacement and reporting of problems. |
This table is a purchasing responsibility map. It does not select an interlock or prescribe a safety function. The design team should explain how these assignments connect, particularly where separate companies supply the guard, device and control panel.
Questions that reveal an incomplete quotation
- Which access tasks and foreseeable working practices were provided to the device supplier?
- Does the offer include application selection, installation drawings and support, or only supply of components?
- Who reviews arrangements that could encourage bypassing, such as repeated inconvenient access?
- Which versions of the device, actuator and control configuration will appear in the handover record?
- What evidence must be reconsidered when a door is relocated or a spare device substituted?
Ask for answers against your own drawing numbers. Generic product literature can explain a component family, but it cannot show that a particular door and its installed device have been considered. A quotation that names the standard without defining the application leaves a commercial gap to resolve.
Example: a packaging-machine access door
A packaging operator frequently opens a side door to clear jams. The buyer receives an offer for a new interlocking device and another for a complete door modification. To compare them, the buyer supplies the same task description, photographs and machine drawing to both bidders. Each must identify the selection work, installation work and control work included.
The buyer also asks who will assess the resulting machine arrangement and document any unresolved assumptions. This makes the offers comparable: a lower component price is no longer mistaken for the price of a completed modification. The example illustrates purchasing discipline; it does not determine which device or machine response is suitable.
Define the document package before ordering
Write the European reference and amendment list in the purchase request. Do not infer that an ISO copy contains the European amendment, or that a base-document button includes it. Ask the seller to confirm the supplied package and retain that confirmation with the project document register.
For the engineering assignment, link the interlocking decision to the risk assessment, guard drawings and control specification. Those records should share a configuration identifier. A later repair then has an understandable starting point instead of a folder of unrelated supplier certificates.
Frequently asked buying questions
Does this replace a guard-design document?
No. Treat the physical guard design and the interlocking assignment as connected purchasing packages with defined owners. The scope identifies guard construction as a separate subject.
Is the European edition dated 2024?
The verified European record is EN ISO 14119:2025. ISO 14119:2024 is the international reference from which it was adopted; preserve the reference your project specifies.
Can I buy the device and leave the rest until installation?
You can obtain an early component quotation, but record the unresolved application and integration work. Decide who will complete it before treating the quotation as a finished solution.
Related guidance
Continue with EN ISO 14120 guard purchasing, EN ISO 13849-1 control design and the machinery standards overview.
Explore more standards buying guides
Browse standards by reference and subject to compare related document choices.