Symmetra PX 250/500: What happens when EPO is activated?

Symmetra PX 250/500; What does the EPO (Emergency Power Off) trip

Symmetra PX 250/500

All serial numbers

What occurs when the EPO on a Symmetra PX 250/500 button is engaged?

When the EPO is activated, UPS output breaker Q2 and the battery breakers are tripped. The Power Modules (inverter), and if in Static Bypass operation, the UPS  will turn off.