| • Duties: Suitable for 2 channel control, for increase in capacity or number of contacts by means of contactors or relays with positive-guided contacts. • If the feedback circuit © is not needed, the inputs X1 and X2 must be bridged. • The NC contact of the buttons A and B must have opened before the NO contact closes. No contact overlapping, otherwise protections F1 and F2 would be triggered. |