Provision of electrical monitoring for guards on machinery that meets the requirements of safety standard prEN1088 are simplified by using XCK limit switches.
From Telemecanique, a brand of the Schneider group, the three ranges of XCK guard limit switch prevent machinery from starting until the guard is fully closed. There is a positive stop signal if the guard is moved from the fully closed position and an anti-tamper feature.
As the guard closes, a special key enters the switch head. Only when the key is fully inserted does it actuate a multiple interlock device which allows the switch’s normally open contact to close. Opening the guard disengages the key and forces the positively driven switch contact to open.
The XCK-P and XCK-T ranges have plastic bodies to provide double insulation and turret heads which can be rotated in 90 degrees steps. XCK-P switches have a single cable entry and the XCK-T units two. Both are suitable for light duty applications. The XCK-J metal-bodied range is for heavy duty jobs. There are versions to automatically lock the operating key in the fully inserted position, preventing the guard from being opened until released.
TELEMECANIQUE ON EXPRESS ENQUIRY CARD 210