SR74 SR75 多原點磁尺:為工作機械所開發(fā)的最適合用在精密平臺定位的磁尺,輸出信號為增量式A/B相/原點差動信號（符合EIA-422）及增量式串列雙方向信號（符合EIA-485）；精度(3+3ML/1000)μm，測量長度：70-2040mm，分辨率0.01μm，響應速度：200m/min，適用工控系統(tǒng)：FANUC、三菱電機、松下。

技術參數(shù)：

Model	SR74	SR75
Measuring length (ML)	70~2040mm 70, 120, 170, 220, 270, 320, 370, 420, 470, 520, 570, 620, 720, 770, 820, 920, 1020, 1140, 1240, 1340, 1440, 1540, 1640, 1740, 1840, 2040	70~2040mm 70, 120, 170, 220, 270, 320, 370, 420, 470, 520, 570, 620, 720, 770, 820, 920, 1020, 1140, 1240, 1340, 1440, 1540, 1640, 1740, 1840, 2040
Thermal expansion coefficient (/ °C)	12 ± 1 x 10-6/ °C	12 ± 1 x 10-6/ °C
Output signal	A/B, Reference point line driver signal (compliant with EIA-422)	Incremental serial bidirectional signal, compliant with EIA-485
Accuracy (at 20 °C) ML:mm	3+3ML/1,000 μm p-p or 5+5ML/1,000 μm p-p	3+3ML/1,000 μm p-p or 5+5ML/1,000 μm p-p
Resolution	Selectable from 0.05,0.1,0.5 and 1.0 μm ( Set at factory shipping)	Selectable from 0.01,0.05,0.1,0.5 and 1.0 μm ( Set at factory shipping)
Reference point	None, Center point, Multi-point (40 mm pitch), Reference mark (standard pitch: 20 mm), User-selected point (1 mm pitch)	None, Center point, User-selected point (1 mm pitch)
Power supply voltage	DC4.75 - 5.25V(At cable connection end)	DC4.75 - 5.25V(At cable connection end)
Consumption current	200 mA (at 120 Ω terminal) max.	200 mA (at 120 Ω terminal) max.
Imrush current	2A max. (When the power supply rise time is 10 ms)	2A max. (When the power supply rise time is 10 ms)
Maximum response speed	50m/min(Resolution: 0.1 um, Minimum phase difference: at 100 ns)	200m/min (User-selected resolution setting)
Vibration resistance	150m/s2 (50Hz~3kHz)	150m/s2 (50Hz~3kHz)
Impact resistance	350m/s2 (11ms)	350m/s2 (11ms)
Protective design grade	IP54 (Air purge not included), IP65 (Air purge included)	IP54 (Air purge not included), IP65 (Air purge included)
Other protections	Oil lubricant can also be used under severe environmental conditions.	Oil lubricant can also be used under severe environmental conditions.
Power supply protection	In the case of errors such as a reverse-connected power supply or over-voltage, the internal fuse is cut to protect the power being supplied and wiring.	In the case of errors such as a reverse-connected power supply or over-voltage, the internal fuse is cut to protect the power being supplied and wiring.
Safety standards	FCC Part15 Subpart B Class A. ICES-003 Class A Digital Device. EN55011 Gp1 Class A, EN61000-6-2. Safety standards not applicable (60 V DC or less).	FCC Part15 Subpart B Class A. ICES-003 Class A Digital Device. EN55011 Gp1 Class A, EN61000-6-2. Safety standards not applicable (60 V DC or less).
Operating temperature range( °C)	0 ~ +50 °C	0 ~ +50 °C
Storage temperature range( °C)	-20 ~ +55 °C	-20 ~ +55 °C
Mass	Approx.0.27kg + 1.36kg/m	Approx.0.27kg + 1.36kg/m
Slider sliding resistance	1N or less	1N or less