Siemens SIMATIC S7 300 6AG1322-1HH01-2AA0 Plastic Cover

The S7-300 6AG1 322-1HH01-2AA0 Module HMI Case, for example, must not be used without taking additional measures:
 in locations exposed to a high degree of ionizing radiation
 in hostile environments caused, for instance, by
– dust accumulation
– corrosive vapors or gases
– strong electric or magnetic fields
 in installations requiring special monitoring, for example
– elevators
– electrical installations in particularly hazardous areas
An additional measure might be, for instance, installation of the S7-300 6AG1322-1HH01-2AA0 Plastic Case in a cabinet or in a housing.

Digital input module SM 322; DI 16 x 24 VDC; with hardware and diagnostic interrupts 6AG1322-1HH01-2AA0 Housing Body Properties
Properties of SM 322; DI 16 x DC 24 V with hardware and diagnostic interrupts:
• 16 inputs, electrically isolated in groups of 16
• Rated input voltage 24 V DC
• Input characteristics to IEC 61131, Type 2
• suitable for switches and 2- /3-/4-wire proximity switches (BEROs)
• 2 short circuit proof sensor supplies for each group of 8 channels
• external redundant sensor supply is supported
• "Sensor supply (Vs)" status display
• Group error display (SF)
• Supports isochronous mode
• Supports parameter reassignment in RUN
• Programmable diagnostics
• Programmable diagnostic interrupt
• Programmable hardware interrupts
• Programmable input delays