Relays often scare me a bit because they almost never
have a diagram on them about what their terminals
do--power, common, coil, normally-open, normally-closed.
And on the older units that have them, the schematic
is often unreadable or not there or not helpful.
Is there a conventional way that terminals are
numbered and assigned duties on relays so
that I don't need to depend on any information
at the unit? (If so, could you please tell me what