Staircase timer ASO-203 Un=24V AC/DC Io<16A with anti-blockage, surface mounting

Staircase timer – reliable lighting control

This compact ASO-203 staircase timer is an ideal solution for controlling lighting in corridors, stairwells, halls or other rooms where automatic light switching after a set time is required. The device is designed for both residential and commercial installations. 24V AC/DC power supply makes it universal and can be used in various systems.

Functionality and safety

The ASO-203 timer offers a wide range of light-on time adjustment – from 0.5 to 10 minutes – allowing it to be adapted to individual needs and user preferences. Equipped with an anti-blocking function, it prevents continuous lighting in the event of a switch being blocked (e.g. with a match), which increases safety and saves energy. The anti-blocking function works by automatically disconnecting the circuit after the set time, even if the switch is still blocked.

Installation and compatibility

Surface mounting simplifies installation and allows for quick implementation of the staircase timer in existing electrical installations. The device works with 3- and 4-wire circuits, ensuring wide compatibility with different types of installations. Screw terminals allow connection of wires with a cross-section of up to 4 mm², ensuring a safe and stable connection. The maximum switching capacity for incandescent bulbs is 1500 W, and for fluorescent lamps – 350 VA (without DUO compensation) and 650 VA (with DUO compensation), respectively. Please note that when using fluorescent lamps with parallel compensation, the maximum switching capacity is 500 VA. The rated inrush current is 10A.

Good to know: Due to the low supply voltage (24V AC/DC), it is not recommended to use illuminated buttons, as they may interfere with the correct operation of the device. If it is necessary to switch larger surge currents, it is recommended to use an external switching element (e.g. a contactor).