International safety standards
       Surrounding air temperature
   0 to 50 °C [32 to 122 °F]
       Storage temperature
   -20 to +60 °C [-4 to 140 °F]
       Ambient humidity
   85 % RH (Wet bulb temperature: 39 °C [102.2 °F] max. - no condensation)
       Storage humidity
   10% to 90% RH (Non condensing, wet bulb temperature 39 °C [102.2 °F] or less)
       Dust
   0.1 mg/m3 (10-7 oz/ft3) or less (non-conductive levels)
       Pollution degree
   For use in Pollution Degree 2 environment
       Air pressure (altitude range)
   800 to 1,114 hPa (2,000 m [6,561 ft.] above sea level or less)
       Vibration resistance
   IEC/EN 61131-2 compliant, 5 to 9 Hz single amplitude 3.5 mm [0.14 in.]
       Electrostatic discharge immunity
   IEC61000-4-2, 6 kV direct contact, 8 kV air contact
       Drop resistance
   IEC/EN 61131-2 compliant, 147 m/s2, x,y,z 3 directions