Phoenix contact mcr voltage measuring transducers contactors and amplifiers phoenix contact 2864406 the phoenix contact mini mcr sl i i 3 way isolating amplifier is 62mm wide and is used for electrical isolation amplification and filtering of standard signals on the input and output side the analog standard signals 020ma or 420ma are available electrically isolated power 192vdc to 30vdc can be supplied through connection terminal blocks on the modules or in conjunction with th