| 摘要 |
<p>The device (1) has an output part to output an object detection signal, and internal tests implementing unit for implementing internal tests and provided in a light grid (2). A testing and evaluation device (3) is connectable to the light grid, and a test input (13) is provided at a receiver unit (5). Test signals generated for implementing external tests in the testing and evaluation device are read by a test input, and response signals generated from the light grid to the test signals are outputted at the testing and evaluation device.</p> |
