Siemens makes a power relay model #3TG1001-0BB4 that has a toggle switch on the front...looks like 1 or 0... I am assuming power on and off...would that be correct? Why would it have an on or off...could this switch mean
something else?

The link to view the relay on page 30 of 32 of the link.:

http://www2.sea.siemens.com/NR/rdon.../0/SIRIUSRelays_e20001a370p302v77600.pdf

Thanks