4-channel, Inputs Ex ia, Mounting in Zone 2, Class I/Div.2 or in the safe area, Power supply for 2-wire transmitters with 4 mA ... 20 mA, Explosion protection: Ex ia, Field device: pressure converter, Field device [2]: flow converter, Field device [3]: level converter, Field device [4]: Temperature Converter, Connection: 2-wire transmitter, Connection [2]: 3-wire transmitter, Connection [3]: 4-wire transmitter, HART communication