What happens to the lynx BMS cerboGX power output in case of a shutdown

DIY
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In my setup I have a Lithium NG battery, a lynx BMS, a cerboGX, an Orion charger and an AGM buffer battery

The Orion charger maintains the AGM buffer battery at 100% at all times
In the event of a Lynx BMS shutdown, the buffer battery can keep vitals systems powered until things can be fixed.

I want to know if the CerboGx would stay up in the event of a BMS shutdown. Is the BMS power output before or after the lynx BMS Contactor?

If not, I’ll consider wiring the cerboGx to the buffer battery instead …

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Hopefully you have a NG version of the Lynx BMS to go with your NG batteries.

I suggest you wire the Cerbo to the AGM buffer battery because the manual in Section 1.2 states that the Aux terminal on the Lynx power down 5 minutes after a BMS low voltage shut down. From this I conclude that the Aux power is the battery side of the contactor but has its own separate shut down.

AUX terminal

The Lynx Smart BMS NG is equipped with an auxiliary power supply. This supply outputs the same voltage as the system battery voltage and is rated at a maximum continuous current rating of 1.1A.

The purpose of the auxiliary power supply is to keep certain systems powered, for example a GX device, after the BMS has turned off loads in case of a low cell voltage event.

Note

It is recommended that the system includes a GX device powered by the AUX port. This keeps the GX device supplied with power until the AUX port is finally switched off (max. 5 minutes after a low cell voltage event) to preserve energy for battery self-discharge.

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thank you, I didnt see this when I read the docs !
yes I do have a NG BMS with the NG batteries.
thank you for your answer

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