1-channel, Input Ex ia, Mounting in Zone 2, Class I/Div.2 or in the safe area, Converter for 2-, 3- and 4-wire Pt100, slide wire sensors, Explosion protection: Ex ia, Field device: resistance thermometer, Field device [3]: slide-wire sensors, Connection: 2-wire sensor, Connection [2]: 3-wire sensor, Connection [3]: 4-wire sensor