Phoenix contact mcr voltage measuring transducers contactors and amplifiers phoenix contact 2865984 the phoenix contact macx mcr ex sl 2nam r up 2 channel isolation amplifier has been designed with wide range power supply for proximity sensors and switches every channel has a relay with pdt contact as a signal output line fault detection lfd 3 way isolation sil 2 phoenix contact 2865984 macx mcr ex sl 2nam r up 2 channel isolation amplifier