AI-Tek Instruments无源速度传感器70085-1010-007图片在线

Digital Signal Distance Amplifier  (DSDA)

The newest member of the AI-Tek family.  The new AI-TEK DSDA’s are designed for  use with active sensors and serve to reduce  line impedance, allowing cable runs of up to  3000ft. In some cases this represents a 10X  improvement over installations not currently  using a DSDA.  Line impedance plays a major role in the distance an active sensor signal can be transmitted  through cable and wire. Mutual capacitance of 25 Pico-farads/foot or more can exist between  conductors. When sufficient resistance from the sensor, cabling and output load is placed in  series with that capacitance signal rise times can increase to the point where the sensor can  no longer switch. This condition becomes even worse due to higher target speeds that cause  output signal frequency rises Two versions were developed to allow use with either TTL or supply tracking output options.  The DSDA will work with any AI-TEK active sensor and many other brands that support these  output styles. Construction is rugged. Each DSDA is potted into a cast aluminum box. Cables enter the box  through weather-tight strain relief bushings and allow all cable connections, including shield,  to be terminated inside the box.  42 AI-Tek Instruments, Cheshire, CT USAEA79880-100 TTL** EA79880-200 SUPPLY TRACKING  INPUT POWER 8 – 24 VDC 4.5 – 18 VDC  SIGNAL INPUT 2.4 – 18 VDC 3.5 – 18 VDC  OUTPUT SIGNAL: Logic 1   Logic 0  3.5 – 5.5 VDC  0.6 VDC max  4.5 – 18 VDC  0. 6 VDC max.  OUTPUT CURRENT 100mA max 100mA max  LOAD IMPEDANCE 240 Ÿ min. 240 Ÿ min.  OUTPUT CABLE LENGTH Up to 3000ft* (914 m) Up to 3000ft* (914 m)  specifications, load specifications, and signal frequency. Keep capacitance, resistance  and inductance as low as p