Rope contact for roller shutters with electronic pulse counter The system, in addition to allowing the replacement of traditional appliances equipped with only two wires, it allows the connection of the alarm contact in series, also with volumetric detectors. The system is PATENTED rolling shutters art. LE SW also already equipped with a further mechanical patent against false alarms. The electronic board powered by a lithium battery of very long duration, it allows the selection of the discrimination of the impulses, and signals with the sound of a buzzer that the battery is low, approximately 15 days before reaching the lower threshold. Once this threshold is reached, the relay opens and remains open until the battery is replaced. • Battery life, over 10 years with 4 daily activations, 6.