Security through switch off prewarning (flashing light). Extension of the illumination time through button actuation. Lamp-preserving zero-voltage switching (longer service life). Can also be used as a current surge switch (3 programmes). The device has the following programmes: BE: Early restart of lighting period. Time restart on button actuation (opening) possible during period of preselected time. BP: Early restart of lighting period and early warning function (flashing lamp). Time restart on button actuation (opening) possible during period of preselected time and warning time of 20 s.IT: Output contact closes after button is pressed. The lighting can be switched off early during the preselected time period.IP: Early switch-off facility and prewarning function. The lighting can be switched off early during the preselected time period and before the shutdown warning system is engaged. RI: Current surge switch (ON and OFF switch through button actuation).ON: Continuous light The output contact remains closed independent of button actuation with the continuous light function. Module type for 35 mm. DIN rail mounting.