SIPART PS2 Smart, electropneumatic positioner, 4...20mA (3/4-wire), HART, Ex/nEx, single-acting, polycarbonate enclosure, for pneumatic linear and part-turn actuators. Standard Type of protection (Ex): Intrinsic safety (Ex i). Output isolator SITRANS I200 separately orderable (7NG4131-1AA00). Connection thread el.: M20x1.5 / pneu.: 1/4" NPT Digital I/O Module (DIO), 1 digital input, 3 digital outputs (2 min. or max. limit values, 1 fault indicator). " Without option module. . Brief instructions English / German / Chinese. Standard / Fail-Safe - Depressurizing the actuator in case of failure of electrical auxiliary power (single acting only). Without Manometer block / Booster.