Slow action (T) Snap action with end-position latching (R) With slow action, there is a differential travel between the opening of the NC contact and the closing of the NO contact; the contacts are not switched simultaneously. The switching points are in exactly the same position during actuation and return switching of the position switching. The switching movement depends on the actuating speed. Slow action is possible with overlapping or with staggered contacts. In case of overlapping contacts, the NO and the NC contacts are si- multaneously closed for a short moment during the switching process. Staggered contacts are possible for two contacts of the same type (i.e. two NC or two NO contacts); the contacts are switched one after the other. An end-position latching function is not pos- sible. Position switches with end-position latching have no return spring and therefore must be put back into the initial position manually after each operation. The end-position latching is only available with snap action position switches.

Position switches according to DIN EN 50047 and DIN EN 50041 Contact variants and switching behaviour Contact variants

Snap action Z Slow action T

Switching behaviour

1 NO contact 1 NC contacts -110 NO contact 2 NC contacts -02 2 NO contact 0 NC contacts -20 Slow action with overlapping contacts T, W1 T, W3 Snap action (Z) Slow action with staggered contacts Latching function R With snap action there is no differential travel between the opening of the NC contact and the closing of the NO contact, i.e. the NC and NO contacts are switched simultaneously. The switching movement occurs snap wise and independent from the actuating speed. Becau- se of the switching hysteresis, the switching points are different when actuating or releasing the switch. This switching system is used when the NC and NO contact must operate simultaneously and no intermediate positions (i.e. either one or the other circuit must be closed) are desired. A latching function is possible. Switching point after ...mmPositive break travel Switching contacts
Pre-travelAfter-travel
13-1421-2221-22

63,52,5

13-14

3,3

21-22 13-14

162,54,3

63,53,5 13-14 23-24 Contact variantsSnap actionSlow action with latching functionwith overlap-ping contactswith stagge-red contacts SÖZRTT..W1T..W3 11 zzzz 20 z 02 zzzz

9