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4. FUNCTION DESCRIPTIONS
Three-position button
The three-position button provides signals, which:
When activated, allow the machine or equipment to be activated using a
separate start control signal.
When deactivated, initiate a stop function which prevents the machine or
equipment from starting.
Two three-position switches are used and controlled simultaneously to create a two-
channel architecture.
An important feature of the three-position button is that when it is released from
position 3, the ON position is never reached, i.e. the contacts remain open. The three-position button always
go back to position 1 when released.
The three-positions functionality:
Position 1 (O):
OFF mode
Position 2 ( I ):
ON mode
Position 3 (O):
OFF mode
1
2
3
Note on operation
To ensure a correct and safe operation, the three-position
button must be pressed to the middle position with two or
three fingers.
2TLC010052M0201_A
the button is not pressed, contacts are open.
the button is pressed in the middle position, contacts are closed
the button is fully pressed to bottom position, contacts are open.
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