Xtium2-CL MX4 User's Manual
Declarations of Conformity
•
111
Note 3: RS-422/TTL Shaft Encoder Input Specifications
Dual Quadrature Shaft Encoder Inputs (phase A and phase B) connect to differential signals
(RS-422), single ended signals, or TTL signals. The figure below shows the simplified
representation of these inputs.
WARNING
:
When connecting shaft encoders to Xtium2-CL MX4, make sure to
connect a common ground between the shaft encoder and the frame grabber.
See
RED
boxed connections in the diagram below.
Failure to follow the described instructions could damage the board resulting in the
shaft encoder functionality not working properly.
Ensure that these grounding measures are followed when migrating from boards
with opto-coupled shaft encoders (such as the Xcelera).
Figure 36: RS-422 Shaft Encoder Input Electrical Diagram
•
The shaft encoder ground and the Xtium2-CL MX4 computer system ground must be connected
together.
•
RS-422 Input Specifications:
•
Input signals must meet the following
•
Maximum differential input voltage is +/- 7V.
•
Minimum differential voltage level is +/- 200mV.
•
Both inputs have a 100-ohm differential resistor.
•
TTL Input Specifications:
•
Input signals must meet the following
•
Input voltage high minimum = 2V
•
Input voltage low maximum = 0.8V
•
Input Current Max = 5mA
Shaft Encoder
1
0
0
?
Phase
B
+
Phase
B
-
1
0
0
?
Phase
A
+
Phase
A
-
Phase B
Phase A
Xtium2
-
CL MX
4
GND
Frame Grabber
/
System Ground
V
+
V
-
