10/100/1000 auto-sensing ports that automatically detect optimal network speeds IP40 slim-type metal housing to withstand harsh industrial conditions Suitable for extreme operating temperatures of -40 to 75ºC (-40 to 167ºF) Option for DIN-rail installation Two small form-factor pluggable GBIC module slots (SFP) Two redundant DC inputs (12 - 48 V) with I/O terminal block Power failure alarm (one-way relay output, current load capacity 1 A @ 24 V DC) Port surge protection up to 6 kV Grounding point to protect equipment from external electrical surges