TELE AID push-button switch, function - GF82.95-P-4101-04PM

In rest mode, electrical current flows through the control resistor (in parallel with the switch contact) installed in the SOS push-button switch (S93/3). When current is flowing through the resistor, the emergency call system control unit (N123/4) knows that the voltage supply line and the ground line are functioning properly. When the SOS push-button switch (S93/3) is pressed, the control resistor is bridged by the switch contact.

The SOS push-button switch (S93/3) signal is read in by the emergency call system control unit (N123/4) over a discrete line. When the SOS push-button switch (S93/3) is pressed, the emergency call system control unit (N123/4) detects a manual emergency call and sends it off.