# General
Product type: Heavy-duty optical incremental encoder
Brand: Pepperl+Fuchs
Housing diameter: 93 mm (ENI90HD) · 110 mm (ENI11HD)
Pulse count: up to 5000 (ENI90HD) · up to 2500 (ENI11HD)
Shaft: Recessed hollow Ø 12…17 mm (ENI90HD) · hollow or recessed hollow Ø 16…28 mm (ENI11HD), insulated versions
# Electrical
Output: Push-pull 5…30 V or 10…30 V · RS-422 5 V, 5…30 V or 10…30 V
Dielectric strength: up to 2.5 kV (ENI11HD)
# Mechanical
Connection: 1…10 m cable · M12 connector · M23 · terminal compartment with cable gland
Rotational speed: max. 6000 rpm (ENI90HD) · max. 3000 rpm (ENI11HD)
# Environmental
Degree of protection: IP65 · IP66/IP67 · IP69K (ENI11HD)
Operating temperature: -40…+85 °C (ENI90HD) · -40…+80 °C (ENI11HD)
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