Heidenhain 1144018-22 (ERM 2489) Scanning head for incremental built-in Encoder with magnetoresistive scanning, 2048 line count, 1Vpp Output and 5V ±10% Line Count (2048) Drum outside diameter (257.50mm) Grating period (395.00um) Output (1Vpp) Reference mark (analog) Power supply (5V±10%) Cable length (1.0m)