Stair light delay switch, 1 normally open contact not potential-free 16A/250V AC, suitable for incandescent lamps up to 2000W, with delay off feature and optional permanent light via push button. Also suitable for energy-saving lamps (ESL) up to 200 watts. Bidirectional. Standby loss only 0.2 watts. Din rail-mounted device for installation on mounting rails. Connection to the Eltako RS485 bus. Cross-wiring for bus and power supply with jumper. Switching voltage 230V. Contact switching at zero crossing to protect contacts and loads. In the event of a power failure, the switching state is maintained. When power is restored, the timing begins, at the end of which the device will turn off. In addition to the bus control input, this stair light delay switch can also be controlled locally with a conventional 230V control button. Glow lamp current up to 5mA, depending on the ignition voltage of the glow lamps. The upper rotary switch LRN is needed for programming. After that, the delay time can be set from 1 to 30 minutes. The middle rotary switch is used in the LRN position to program radio buttons and/or radio motion brightness sensors (FBH), including one or more central control buttons. After that, the desired function of this stair light delay switch can be selected: NLZ = delay switch with adjustable response delay. The LED under the upper rotary switch guides the programming process according to the user manual and indicates control commands during operation by briefly flashing.