The operating mode with contactor control serves for monitoring the triggered follow-up contactors. After each interruption of the optical path and before each release of the switching outputs the follow-up contaction are checked whether they dropped. If the contactors don´t dropped with in 300ms the light curtain output contacts go into lock status.

If the operating mode with restart control is adjusted, a push-button must be connected for the start release of the working movement. With a free protection field the yellow LED lights up. After actuating the start push-button the two outputs of the ULVT are activ.

In the operating mode bivalent outputs both PNP outputs are errorproof and internally monitored on short circuit ad transverse. With free optical path, both outputs are high (+24V). In the operating mode antivalent outputs with free optical path output1 is high (+24V) and output2 is low (0V). Output2 is not error-proof in this operating mode. This operating mode is only allowed in connection with the control-units LSUW N1-Muting Koder or another safe secondary control, which monitors the Output 2!