According to Volume 8/1, a manufacturer may replace the physical layer of his product by another physical layer of the same medium provided that the following conditions are met:
Replacing a TP certified physical layer
| Replacement |
Repercussions? |
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Replacement of a digital transceiver by another digital transceiver:
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- Re-registration/retesting not required
- Inform the Certification department of KNX Association of this change
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Replacement of a digital transceiver by an analog transceiver (ASIC or discrete solution)
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- Re-registration and re-testing is required for new combination of analog transceiver and stack
- This implies that the physical part of the Link Layer needs to be implemented in the stack, as analog transceivers only provide a bit interface to the KNX TP Physical layer.
- Extra tests required: In order to check the compliance of this extra implementation, a witness testing is done at the premises of the manufacturer as laid down in Volume 8/2/2 of the KNX Specifications. The following tests will be carried out:
- tests for coding/decoding/collision of the Physical Layer.
- tests for the Physical part of the Link Layer.
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Replacing an RF certified physical layer
Reference is made to 08_01 System Conformance Testing - Introduction, Clause 4.
