Zone 1
Explosive gas atmosphere likely to occur in normal operation
Zone 2
Explosive gas atmosphere unlikely to occur and, if it does, only for a short period
Zone 21
Explosive dust atmosphere likely to occur in normal operation
Zone 22
Explosive dust atmosphere unlikely to occur and, if it does, only for a short period
# General
Type: Copper-free aluminium limit switch boxes with large terminal compartment
Available models: 5
# Technical features
Interface: VDI/VDE 3845
Housing: copper-free aluminium (Cu max 0.05%)
Cable entries: 4x M20x1.5
Terminal block: spring-cage
SIL level: SIL 1-3
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