I have a PowerMax+ Security system that has a maximum output of 550mA at 12dc volts for a remote siren. I have a large 6v bell that requires .5 A.dc I hooked the bell up and tried it for about 5 seconds and it is really loud. I am conserned that damage may be done to either the bell or the security system, main consern is security system. I guess what I am asking is 550mA considerably less then .5 amp. I am also aware that I am using a 6volt bell with a 12volt source.