Mechanical timer switch EMOS P5504 24-hour 15A (model 15FD/3A) - programmable on/off cycles

Mechanical timer switch EMOS P5504 24-hour 15A (model 15FD/3A) is a compact, electromechanical device for scheduling daily on/off cycles of electrical loads. The unit is built around a 24-hour dial with mechanical segments (pins) to set switching intervals and a manual override to turn the connected appliance on or off without changing the programmed schedule. Rated for up to 15 A, the timer is intended for recurring, time-based control of lighting, pumps, heaters and similar household or light-commercial equipment.

Advantages

The EMOS P5504 timer offers a straightforward mechanical setup that does not require programming knowledge or batteries. Its 24-hour dial with physical segments provides visible and tactile confirmation of set intervals, and the manual override allows immediate control when needed. The device's 15 A switching capacity supports a variety of common electrical appliances. Its construction is suitable for wall or DIN-rail mounting depending on the installation variant and simplifies automated daily operation without complex configuration.

Suitable for

• Automating indoor and outdoor lighting circuits on a daily schedule
• Controlling circulation pumps and small water pumps for timed operation
• Managing electric heaters, convectors or fan units with recurring schedules
• Switching aquarium equipment, ventilation or other small appliances

Key specifications

• Operating cycle: 24-hour mechanical dial with repeating daily schedule
• Switching capacity: up to 15 A resistive load
• Setting method: mechanical segments/pins for on/off intervals
• Control options: manual override for immediate on/off
• Typical mounting: wall or panel compatible mechanical housing
• Power supply: mains AC operation (standard household voltage)

How to use

Install the mechanical timer switch according to local electrical regulations and ensure power is disconnected before wiring. Set the current time by rotating the 24-hour dial to align the present time with the reference marker. Push down or lift the mechanical segments at the dial positions corresponding to the desired on/off intervals; each segment represents a fixed time increment. Restore power, then use the manual override switch on the unit to operate the load immediately or leave it in automatic mode to follow the programmed daily schedule.

Usage recommendations

Verify the connected appliance's current draw does not exceed 15 A and avoid inductive loads that create large startup currents unless adequately protected. For outdoor installations, use a weatherproof enclosure and comply with IP rating requirements. Periodically check the mechanical segments and dial alignment to ensure the programmed schedule remains accurate.