What is meant by response time of a light curtain?
The response time of the light curtain is the time it takes for the light curtain to transmit the output (alarm) signal to the safety interface or machine control element after the protection field has been interrupted. The overall response time of the light curtain safety system includes the response time of the light curtain, the response time of any interposed interface (such as a safety controller or safety PLC), and the response time of the machine primary control elements (e.g. motor contactor or control relay). Response time is one of the important factors that must be considered when calculating the proper minimum safety distance.
