Patent ID: 6847030

Claim:
A scanning device for a position measuring system for scanning a scale graduation comprising: a probe being operatively connected with the scale graduation; an electronic module being electrically coupled to the probe via conductor strips; the conductor strips supplying electric current to the probe; a housing of the electronic module for shielding the electronic module from the surroundings, the probe being placed completely outside the housing, and at least parts of the conductor strips, leading from the electronic module to the probe, being disposed outside the housing; and means for limiting the supply of current to the probe, wherein at least one fuse is provided in the conductor strips, leading from the electronic module to the probe, within the housing, for interrupting the flow of current to the probe when the temperature produced as a result of the current flow exceeds a specific value, wherein the at least one fuse is formed by a sectional constriction of the conductor strips and wherein the housing of the electronic module further forms the housing of the at least one fuse.