Operating Specifications
ABL/ABLH9000 Series Stage User's Manual
3.3. Load Capability [TBD]
3.4. Limit Switch Wiring
ABL/ABLH9000 series stages are provided with a series of optical limit switch assemblies. The limit
switches signal when the stage has reached its maximum useable travel distance in all directions.
3.4.1. Limit Switch Operation
Each limit switch has a light source and detector mounted to a small printed circuit board. Each limit switch
board is mounted at the ends of an axis with their emitter–detector axes perpendicular to the direction of axis
motion. The limit switch itself can be configured as normally closed (NC) or normally open (NO).
If the stage is driven approximately 6 mm beyond the electrical limit, it will encounter a
mechanical stop. Although the operating speed of the stage may be relatively slow, damage
to the stage could result.
3.4.2. Limit Switch Wiring
Limit switches are open-collector, TTL–compatible, electro–optical devices powered by 5 Volts that change
output states when the stage approaches its maximum travel distance and breaks the light beam. Since they
are open-collector devices, they may be interfaced to 24Volt logic inputs. Each limit switch is mounted on a
small printed circuit board. Standard ABL/ABLH9000 Stages include limit switch wiring integrated into the
feedback connector.
Assuming a NC limit configuration, the input to the controller is seen as a logic 0 (typical 0.4V @ 12.8mA)
when no limit condition is present. When the limit switch is activated, a 5V source through a pull-up resistor
causes a logic 1 (typically 4.8-5V) to be seen by the controller input. The limit switch operation for a NO limit
configuration is the exact opposite as described above. See Figure 3-2 for a diagram of limit switch wiring.
Figure 3-2:
Normally Closed (NC) and Normally Open (NO) Limit Switch Wiring
16
Chapter 3
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Summary of Contents for ABL9000 Series
Page 4: ...Table of Contents ABL ABLH9000 Series Stage User s Manual iv www aerotech com...
Page 6: ...List of Figures ABL ABLH9000 Series Stage User s Manual vi www aerotech com...
Page 8: ...List of Tables ABL ABLH9000 Series Stage User s Manual viii www aerotech com...
Page 18: ...Installation ABL ABLH9000 Series Stage User s Manual 10 Chapter 2 www aerotech com...
Page 26: ...Operating Specifications ABL ABLH9000 Series Stage User s Manual 18 Chapter 3 www aerotech com...
Page 34: ...ABL ABLH9000 Series Stage User s Manual Index 26 Index www aerotech com...
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