Siriuswe PoE

Hi,

Quick query regarding injecting PoE into a Siriuswe via a PoE ethernet switch, I note that the Sirius input voltage is 9-36V, as such is it safe to use a auto negotiation PoE switch or does it require a Passive PoE injection wit a voltage of 9-36V.

I appreciate that you sell numerous PoE injectors, I'm just looking at simplifying some of our planned test setups that will utilise a PoE switch for other non-dewesoft equipment in the same test setup. Due to the needed data rate for the testing we are conducting we will be connecting to an sbox via USB so we cant utilise the ethercat connector on the sbox.

Thanks

Tristan

Thank you for reaching out.

To answer your question directly: our EtherCAT devices (including the Sirius) do not officially support PoE, and it is not safe to use an auto-negotiation (active) PoE switch.

While passive PoE (9-36V) could theoretically power the unit because our pinout is somewhat similar to Mode B PoE, we strongly advise against this approach for a couple of critical reasons:

• Hardware Compatibility: You would need a custom adapter cable to match the pinouts correctly.
• Network Flooding: Even though you are using USB to send data to the SBOX, the Sirius unit will still broadcast EtherCAT traffic out of its EtherCAT port. If you plug this into a standard PoE switch shared with other non-Dewesoft equipment, the EtherCAT traffic will very likely flood the switch and disrupt your entire network setup (unless you can completely isolate that specific port on the switch).

Because of these risks, powering the Sirius via a standard PoE switch is done entirely at your own risk, and we cannot guarantee functionality or cover any resulting equipment damage.

If you are looking to simplify your test setup while keeping the SBOX USB connection, we highly recommend powering the Sirius directly using our standard 8-pin EtherCAT power supply, an open-end cable, or by using the IOLITE power injector (connecting the cable only to the Sirius, and keeping it disconnected from the PC/switch side to avoid data flooding).