We have noticed the TSW202 provides PoE power to other PSE devices.
PSE devices should NOT provide Power to other PSE deices if Chipset does first & second level handshakes correctly.
Connect one 202 to 48v DC, connect it to a second 202 and the first 202 will power the second 202.
Add a full 280-watt load to both 202 and let the first one power the second [no DC connection to the second 202].
When it gets so hot, then you know it is overloaded, the feeding 202 blew up/fried after a few hours as it is not designed to carry two separate 280 watt loads with the primary feed only connected to the first / primary 48v power system.
We note the 202 does NOT provide PSE power to Cisco [and some TrendNet/Siemens] industrial switches, they have, those devices, I assume, the intelligence not to link Power when connected to other PSE devices.
It does [that is a yes] provide power to most the China Microchip/Vitek chip based low cost PoE PSE switches when connected to it.
One good note, the 202 is one of the few devices with this defect that does not burn the Non-PoE ethernet ports of connected equipment.
Next issue:
When a RUT type router is connected to a 202, the router cannot be power cycled as it derives its power from tat least one of the connected 202s. [LAN1-2-3].
Same holds true for any connected 202 which power each other via PoE irrespective of any 48v DC input.
Each Teltonika device is connected to a SCADA Contactor to allow for hard power resets.
When we open the contact to any connected (same local bus) RUT{x} or 202, they will not power cycle as the power is coming from the connected 202’s.
All contactors connected to Telktonikas in a site have to be opened at the same time to reset any individual device.
Obviously, that drops every and all connected services at the client’s site for around 2-3 mins while the 202 reboots.
Ideas?