The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
a count of all of the component leads (or pins)
The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.
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.