SIPART PS2 smart electropneumatic positioner for pneumatic linear and part-turn actuators; 2-,3-,4-wire; 4...20mA with HART-interface; single action; Enclosure Aluminium, small Standard Type of protection (Ex): Intrinsic safety (Ex i). Output isolator SITRANS I200 separately orderable (7NG4131-1AA00). Connection thread el.: 1/2" NPT / pneu.: 1/4" NPT Without limit monitor. 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.