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Simply pull and turn ...
Like the original fire handles you need to pull the lever first, and then turn it either to left or right.
On the picture left you can see the lever in its off position, as well as pulled and turned. Have an eye at the mechanism. The tiny little bolt is used to press a micro switch after pulling the lever. Connect this switch to your IO-card, and you know when the lever is pulled. The rotary switch on the bottom of the black housing is used to sense the left or right position of the rotated handle. |