Engineering notes
ATS and generator contacts the BMS should see
Mains, generator and ATS status into the BMS: dry contacts, never 230 V into a digital input.
The shift needs to see the source, not start the generator
Most files only ask the BMS to watch: on mains, on generator, generator fault, fuel float if listed. Start/stop stays on the ATS panel — not on a weak controller output.
- Mains present / mains lost
- Generator running, generator fault
- ATS on mains or on generator
One dry contact per status. Never feed 230 V into a digital input. Interposing relays · Technical infrastructure