From 1fac6f9a27c7b3716f6ac1bf30bff0a4b5820a9f Mon Sep 17 00:00:00 2001 From: Christian Ehlers Date: Mon, 29 Jun 2020 21:05:14 +0200 Subject: [PATCH] Update PoE warnings (#287) * Update PoE warnings --- .gitignore | 1 + content/tutorials/all/PoE.md | 70 +++++++++++++++++++++++++++++------- 2 files changed, 58 insertions(+), 13 deletions(-) diff --git a/.gitignore b/.gitignore index aeb25b3..b0f719b 100644 --- a/.gitignore +++ b/.gitignore @@ -14,3 +14,4 @@ static/gitbook/.DS_Store static/gitbook/assets/.DS_Store static/gitbook/assets/pybytes/.DS_Store scripts/githubToken.json +.project diff --git a/content/tutorials/all/PoE.md b/content/tutorials/all/PoE.md index 2394a21..ffc3cd9 100644 --- a/content/tutorials/all/PoE.md +++ b/content/tutorials/all/PoE.md @@ -6,17 +6,61 @@ aliases: - chapter/tutorials/all/PoE --- -The PyEthernet module has onboard Power over Ethernet (PoE) power supply. This means that you can power your hardware with only an ethernet cable coming from a power injector. However, since the PoE is non-isolated, you must adhere to the following warning! - -WARNING: - -PoE power supply of PyEthernet module has no galvanic isolation. This means, that in accordance with -IEEE 802.3-2005 standard you must make sure that when powered from PoE power injector there are no other external connections to any part of the module or other hardware where it is installed. Such as USB cable, serial to USB bridge, logic analyser, an oscilloscope, etc. - -As in certain hardware configurations it can lead to unrecoverable damage of not only the PyEthernet module but all hardware connected to it. - -Be aware - violation of that requirement voids Pycom warranty. - -The use of battery with PoE is allowed. - ![](/gitbook/assets/PoE-NI.png) + +The PyEthernet module offers an optional onboard Power over Ethernet (PoE) power supply circuit. This means that you can power your hardware with only an ethernet cable coming from a power injector or PoE enabled Ethernet switch. However, since the PoE is non-isolated, you must adhere to the following warning! + +{{% hint style="danger" %}} +WARNING: Before you use the PoE adapter for the first time, please make sure you read and follow the below instructions as failure to do so might damanage your devices! +{{% /hint %}} + +The PoE power supply integrated in the PyEthernet module has no galvanic isolation. This means that in accordance with +IEEE 802.3-2005 standard, you must NOT connect any other devices / cables / chargers if the GND connection is connected to mains earth! +This is typically the case with PCs, Oscilloscopes, Logic Analysers, current consumption measurement devices etc. + +Incorrect usages of Power over Ethernet can lead to unrecoverable damage of not only the PyEthernet module but all hardware connected to it. + +A battery can be connected to the PyGate without issues. The battery can be charged via both USB-C and PoE power. + + +

Setup Options

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Connectivity option Power over Ethernet Power over USB-C / external supply
USB-C cable connected to a PC with mains ground protection NOT OK OK
USB-C cable connected to a Notebook without mains ground protection OK OK
USB-C charger with mains ground protection NOT OK OK
USB-C charger without mains ground protection OK OK
Oscilloscope / Logic Analyser / Other equipment with mains ground protection NOT OK OK
Battery OK OK