ETAS ES1337.2, User Manual

Page: 14 / 29

Hardware Features 14
2.1.3 Type “ DF10-RotDir”
The sensor of type “DF10-RotDir” differs from “DF10” in that a third current
level is output with reverse movement:
When the vehicle is not moving (speed level < v
min
), the current I
idle
= 7 mA is
output. The currents in forward movement and reverse movement are shown
in Fig. 2-3.
Fig. 2-3 Output Signals of a “DF10-RotDir” Sensor
A reverse movement is shown when the sensor outputs a current
I
reverse
= 28 mA for a short time t
reverse
.
I
forward
t
reverse
I
idle
I
reverse
Forward Rotation
Reverse Rotation
I
idle
I
reverse
= 28 mA
I
forward
= 14 mA
I
idle
= 7 mA
I
forward
Gear Wheel