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"around the corner", in crevisses or through holes.
• Necessity of flush mounted installation.
• Required minimum distance between several adjacent proximity sensors. 9.4
considerations • Ambient temperature
• Effect of dust, dirt, particles, humidity, splashing water, water jets inter alia, see
IP protection classes.
• Influence of magnetic or electric fields, e.g. in a welding environment.
• Influence of external light emissions (peculiarities of ambient lighting).
• Area with explosion hazard
• Clean room environment
• Requirements for hygiene or sterilisation for use with food packaging or in a
• Application in high pressure or vacuum conditions. 9.5
Safety applications • Application in areas with explosion hazard
• Application for the purpose of accident prevention
• Application where increased safety measures are required against breakdown © Festo Didactic GmbH & Co. KG • FP 1110 139 9. Selection criteria for proximity sensors 9.6
proximity sensors 140 • Design/type with specification of dimensions
• Voltage supply (direct current, alternative current)
• Type of switch output and type of protective circuits:
– Positive switching (PNP output)
– Negative switching (NPN output)
– Short circuit protection
– Reverse polarity protection
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.
- Spring '12