Exposed Linear Encoders - DR. JOHANNES HEIDENHAIN GmbH - #39

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39 Specifi cations LIDA 489 LIDA 479 Measuring standard Coeffi cient of linear expansion Steel scale-tape with METALLUR graduation Þtherm .. 10 · 10–6 K–1 Accuracy grade ± 15 ìm or ± 5 ìm after linear length-error compensation in the subsequent electronics Measuring length ML* in mm 70 120 170 220 270 320 370 420 520 620 720 820 920 1 020 Reference marks One at midpoint of measuring length Incremental signals » 1 VPP « TTL Grating period 20 ìm Integrated interpolation* Signal period – 20 ìm 5-fold 4 ìm 10-fold 2 ìm 50-fold 0.4 ìm 100-fold 0.2 ìm Cutoff frequency –3dB ‡ 400 kHz – Scanning frequency* – † 400 kHz † 200 kHz † 100 kHz † 50 kHz † 200 kHz † 100 kHz † 50 kHz † 25 kHz † 50 kHz † 25 kHz † 12.5 kHz † 25 kHz † 12.5 kHz † 6.25 kHz Edge separation a1) – ‡ 0.100 ìs ‡ 0.220 ìs ‡ 0.465 ìs ‡ 0.950 ìs ‡ 0.100 ìs ‡ 0.220 ìs ‡ 0.465 ìs ‡ 0.950 ìs ‡ 0.080 ìs ‡ 0.175 ìs ‡ 0.370 ìs ‡ 0.080 ìs ‡ 0.175 ìs ‡ 0.370 ìs Traversing speed1) † 480 m/min † 480 m/min † 240 m/min † 120 m/min † 60 m/min † 240 m/min † 120 m/min † 60 m/min † 30 m/min † 60 m/min † 30 m/min † 15 m/min † 30 m/min † 15 m/min † 7.5 m/min Limit switches L1/L2 with two different magnets; output signals: TTL (without line driver) Power supply Current consumption DC 5 V ± 5 % < 100 mA DC 5 V ± 5 % < 170 mA (without load) DC 5 V ± 5 % < 255 mA (without load) Electrical connection Cable length Cable 3 m with D-sub connector (15-pin), interface electronics for LIDA 479 in the connector † 20 m (with HEIDENHAIN cable) Vibration 55 to 2 000 Hz Shock 11 ms † 200 m/s2 (EN 60 068-2-6) † 500 m/s2 (EN 60 068-2-27) Operating temperature 0 °C to 50 °C Weight Scanning head Scale tape Connecting cable Connector 20 g (without connecting cable) 31 g/m 22 g/m LIDA 489: 32 g, LIDA 479: 140 g * Please indicate when ordering 1) At the corresponding cutoff or scanning frequency