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ROTARY ENCODER OPTICAL 8PPR
Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element.
An encoder is classified into four types: mechanical, optical, magnetic, and electromagnetic induction types.
Pulses per revolution (or PPR) is a parameter associated with encoders. Basically, it is a measure of the number of pulses per full revolution or turn of the encoder, with a full revolution being 360 degrees. In essence, it is a measure of an encoder's resolution.
IP (or "Ingress Protection") ratings are defined in international standard EN 6529 (British BS EN 6529:1992, European IEC 659:1989). They are?used to define levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies?(tools, dirt etc) and moisture.