Switches The utilized switches can also supply either a "0" or "1" signal. Depending on whether you have planned them as normally-closed or normally-open contacts (see Reference list), they supply a "1" or "0" signal when not actuated. The signal changes to "0" or "1" when the switch is actuated. This signal is present as long as the switch is not actuated again. Feedback from EMERGENCY STOP pushbutton EMERGENCY STOP pushbuttons are pushbuttons with an additional mechanical lock and are connected to a safety relay. They thus behave like a switch. The EMERGENCY STOP feedback from the safety relay is planned as a normally closed contact for safety reasons. If a wire break occurs, therefore, this feedback is no longer present and the station responds as if an EMERGENCY STOP has tripped. Sensors Position switches A main switch is actuated to switch on the station. This energizes a relay and supplies the power to the station. A position switch provides feedback on the operation of the relay. Limit switches The switches supply a signal when the cylinder is either fully retracted or extended. The limit switches are implemented as normally-closed or normally-open contacts. Light barriers / optical sensors The light barriers supply a "1" signal as soon as an object is in the sensing range. Metal detection / Inductive sensor The inductive sensor supplies a "1" signal as soon as a metallic object enters its sensing range. In the case of non-metallic objects, the signal remains at "0". Motor speed The motor speed is recorded by an incremental encoder at the conveyor motor and provided as an analog value via a transducer. The speed falls within the range from -50 rpm to 50 rpm. That corresponds to a conveyor belt speed of -10 m/s to +10 m/s.
Switches The utilized switches can also supply either a "0" or "1" signal. Depending on whether you have planned them as normally-closed or normally-open contacts (see Reference list), they supply a "1" or "0" signal when not actuated. The signal changes to "0" or "1" when the switch is actuated. This signal is present as long as the switch is not actuated again. Feedback from EMERGENCY STOP pushbutton EMERGENCY STOP pushbuttons are pushbuttons with an additional mechanical lock and are connected to a safety relay. They thus behave like a switch. The EMERGENCY STOP feedback from the safety relay is planned as a normally closed contact for safety reasons. If a wire break occurs, therefore, this feedback is no longer present and the station responds as if an EMERGENCY STOP has tripped. Sensors Position switches A main switch is actuated to switch on the station. This energizes a relay and supplies the power to the station. A position switch provides feedback on the operation of the relay. Limit switches The switches supply a signal when the cylinder is either fully retracted or extended. The limit switches are implemented as normally-closed or normally-open contacts. Light barriers / optical sensors The light barriers supply a "1" signal as soon as an object is in the sensing range. Metal detection / Inductive sensor The inductive sensor supplies a "1" signal as soon as a metallic object enters its sensing range. In the case of non-metallic objects, the signal remains at "0". Motor speed The motor speed is recorded by an incremental encoder at the conveyor motor and provided as an analog value via a transducer. The speed falls within the range from -50 rpm to 50 rpm. That corresponds to a conveyor belt speed of -10 m/s to +10 m/s.
SCE_EN_020-100%20Process%20Description%20Sorting%20Station_R1709.docx