The product is an incremental encoder with an outer diameter of 100mm. Please purchase according to the inner hole distance and pulse. The hole pitch is 30, 40, 45mm, etc. A30-1024r30el, a30 is the hole pitch, 1024 is the pulse, and 30el is the broadband voltage. For different brands, the corresponding hole pitch and pulse can be used in common, which can replace Huitong's EI100H30C. The conventional line is red, blue, white and yellow plus a shielded mesh,corresponding to positive, negative, A, B and shielded mesh