IM12-22EX-R Isolating Switching Amplifier 2-channel Intrinsically Safe Input Circuits. For Application In Zone 2 , Fm, Nepsi, Sil 2, Application Areas [Exia] Iic/Iib Und Ex Na Nc [Nl] Iic/Iib T4, Selectable Output Mode (N.O./N.C. Mode), Signal Fan-out