MK Magnetic Absolute Linear Encoderby Precizika MetrologyNon contact absolute magnetic linear encoder MK has measuring length up to 30 m. The encoder is used to convert linear displacements of key machine components into electrical signals containing information about components absolute position. Encoder consists of metal based magnetic band MP, reading head and protective steel cover CV. Encoder also could be supplied with protective aluminum support SP (instead of protective cover CV), which is mounted on machine for magnetic band protection. The encoder has two versions of serial interface SSI or BiSS C. On option third encoder version is available: with 2 analog sinusoidal signals with phase shift 90º C and amplitude approx. 1Vpp. MK PARAMETERS Pole pitch 2+2 mm Measuring length up to 30 m Incremental Signal sine wave 1 Vpp (optional) Resolution 1 Vpp up to 1 µm (depending on CNC division factor) Repeatability ±1 increment Signal period 2 mm Serial interface SSI or BiSS Resolution absolute position 500, 100, 50, 10, 5, 1 µm Accuracy ± 15 µm Max. traversing speed 300 m/min Power supply (5...28 V) DC ±5% Current consumption with load 150 mA max. (with R=120 Ohms) Protection (EN 60529) IP67 Operating temperature 0...+50 °C Storage temperature -20...+70 °C Permissible humidity 100% Permissible vibration (55...2000 Hz) 200 m/s² Permissible shock (11 ms) 1000 m/s² Weight of reading head 80 g Electrical protections from inversion of power supply polarity and from short circuit on output port Standard cable length / max. cable length 2.0 / 25.0 m (100m if power supply is 5V) OUTPUT SIGNALS Interface SSI Binary - Grey BiSS C unidirectional Signals level EIA RS 485 EIA RS 485 Clock frequency 0.1 ÷ 1.25 mhZ 0.1 ÷ 4 MHz n Position bit 26 + 2 + bit Tc 12 ÷ 65 µs 12 ÷ 20 µs
