Hardware manual

Operating Specifications AGR Series Stage Hardware Manual
3.5. Limit Switch Wiring
AGR series stages are provided with a optical limit switch. The limit switch signals when the stage has
reached its maximum useable travel distance in all directions. The limit switch is mounted to a small circuit
board within the stage. A reflective surface is used as a trigger.
3.5.1. Limit Switch Operation
The limit switch is mounted on a small, printed circuit board. AGR stages with the limit option include a limit
switch connector. Limit switches on AGR series stages can be configured as normally-open or as normally-
closed. Typically, the input to the controller is seen as a logic 0 (typical 0.4V at 12.8 mA) 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.
Normally Closed (NC)
NC Limit
Switch
Pull-Up
Resistor
STAGE CONTROLLER
+5V
Normally Open (NO)
NO Limit
Switch
Pull-Up
Resistor
STAGE CONTROLLER
+5V
Figure 3-2: Limit Switch Wiring
Table 3-18: Limit Switch Connector Pin Assignment
Pin # Pin Output Description Connector
1 LMT +5V +5V supply input for optical limit switch boards (the typical
requirement is 50 mA).
1
5
9
6
2 LMT COM Common ground to limit switch.
3 CW/+ LMT Signal indicating maximum travel produced by
positive/CW stage direction.
4 Home LMT Home reference limit output
5 CCW/-LMT Active high signal indicating stage maximum travel
produced by negative/CCW stage direction.
6 SIG SHLD Signal shield connection
NOTE:Pins not shown are reserved.
Table 3-19: Limit Switch Mating Connector
Aerotech P/N 3rd Party P/N
Backshell ECK01021 Amphenol DE24657
Connector ECK00340 Cinch DE-9S
36 Chapter 3 www.aerotech.com