RUNRACE : Service & Maintenance Manual - rev. 2.0
Page 3.10
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Limit switch signal
This is the signal from the 2 limit switches which determine the machine’s range of up-down
motion. The lower microswitch is a NC contact input to the up-down board (pin 4-6 of
connector CN3). When this contact opens the circuit board inhibits movement in the down
direction. The upper microswitch is a NO contact input to the up-down board (pin 3-6 of
connector CN3). The upper microswitch is always pressed therefore it provides a NC contact.
When this contact opens the circuit board inhibits movement in the up direction.
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