USB3-FRM13 User’s Manual
17
2-6-2 A, B, Z Encoder
USB3-FRM13 board can be controlled with using four pair Isolated Photo coupler
input signals. Photo-coupler circuit is shown below. Output current should be used less
than 10mA.
EA, EB, EZ,
REV
EA+, EB+, EZ+,
REV+
EA-, EB-, EZ-,
REV-
680
[Figure 2-15. Photo-coupler Circuit]
Caution) As Trigger Control can change according to kinds of Motion Controller or
Camera, when you want use this function, contact to DAQ system
Rotary Encoder is used to detect a speed and turn direction of the electric volume or
Motor. When turning the axis of rotation, two pulse signals that are able to distinguish
between left and right, come out proportional to the speed. A single phase, A / B
phase, A / B / Z phase are separated, the resolution can be determined according to
the A / B pulse number by one turn.
USB3-FRM13
OUT
TTL(3.3V)
Line Drive
Encoder
Encoder IN
Line Driver
PHOTO
FPGA Core Logic
Camera
Motion Controller
Or
Digital I/O
A, B phase : Forward movement
A, B phase : Backward movement
A Phase
B Phase
A Phase
B Phase
[Figure 2-16. Encoder A/B Phase Clockwise/Counter Clockwise]
