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SI4 Hardware Manual
2.2.2. End of Travel Limits
End of Travel (EOT) limits are required to define the end of the physical travel on linear axes. Positive or
clockwise motion is stopped by the clockwise (CW) end of travel limit input. Negative or counterclockwise
motion is stopped by the counterclockwise (CCW) end of travel limit input. All of the end-of-travel limit
inputs accept 0-5 VDC level signals. Limit directions are relative to the encoder polarity in the diagnostics
display (refer to
Figure
Table 2-8:
End of Travel Limit Pins on the Axis Connector
Pin # Description
3
Limit Common
7
Clockwise End of Travel Limit
8
+5 V Supply (500 mA)
20
Counterclockwise End of Travel Limit
The active state (High/Low) of the EOT limits is software selectable (by the EndOfTravelLimitSetup axis
parameter).
Figure 2-4
switches and the parameter setting to use for each configuration. Use NPN-type normally-closed limit
switches (Active High) to provide fail-safe behavior in the event of an open circuit.
www.aerotech.com
1-1).
shows the possible wiring configurations for normally-open and normally-closed
Figure 2-4:
End of Travel Limit Input Connections
Figure 2-5:
End of Travel Limit Input Schematic
2.2.2. End of Travel Limits
In/Out/Bi
N/A
Input
N/A
Input
33
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