Programmable Analogue Timer Switch Vertical Dial Daily with Power Reserve

The Legrand 412790 programmable time switch is a modular analog timer designed to automate the switching on and off of electrical circuits according to a daily schedule. It features a vertical dial, 15-minute programming intervals, a 16-amp output, and a 100-hour power reserve that keeps the clock running during temporary power outages.

With a 230-volt AC supply and a compact 1-module format, it can be installed on a DIN rail in electrical panels to automatically control loads such as lighting or heating. Its three-position front selector lets you choose between permanent, automatic, or off operation.

Analog time switch with daily programming

Reference 412790 belongs to Legrand's range of programmable time switches and uses 24-hour analog programming.

The vertical dial represents a full day cycle and is divided into 15-minute segments. These segments make it possible to set the periods during which the output should remain on or off.

Once programmed, the cycle repeats automatically every 24 hours, making it especially practical for installations that need to maintain the same operating schedule every day.

Minimum programming interval of 15 minutes

Each segment of the timer corresponds to 15 minutes, which is also the minimum switching interval allowed by the device.

This resolution makes it possible to set different operating periods throughout the day without needing more complex digital programming systems.

Legrand specifies a switching accuracy of plus or minus 5 minutes for this analog time switch.

100-hour power reserve

One of the main features of the Legrand 412790 is its 100-hour power reserve. The device includes a rechargeable accumulator that keeps the clock running when the power supply is temporarily interrupted.

This means a power outage does not require immediate resetting of the timer, provided the interruption remains within the specified reserve capacity.

Legrand identifies the integrated storage element as a nickel-metal hydride rechargeable accumulator.

16-amp output

The time switch has 1 channel and 1 potential-free normally open contact. The rated switching current is 16 amperes at 250 volts AC for a load with power factor cos phi equal to 1.

This capacity makes it suitable for automating different compatible circuits, although the nature and power of the intended load should always be checked.

Automatic control of lighting and heating

Legrand recommends this timer for applications such as time control of lighting or heating. It allows daily on and off periods to be set without having to operate the switch manually every day.

It can be used, for example, to control circuits that should operate only during certain time slots, always respecting the electrical rating of the contact and the characteristics of the connected load.

Front selector ON, AUTO and OFF

The front panel includes a three-position manual selector that allows you to choose between different operating modes:

• ON: permanent manual activation of the output.
• AUTO: operation according to the schedules set on the programming dial.
• OFF: manual disconnection of the output.

This function makes it possible to temporarily override the programming when needed without changing the previously configured time segments.

Manual summer/winter time change

The Legrand 412790 allows for a manual summer/winter time change. The adjustment is not automatic, so it must be changed manually when required.

Time setting is also carried out directly on the device's analog mechanism.

Quartz-controlled clock

The time mechanism is quartz-controlled, providing a stable reference for the daily programming cycle.

The combination of the quartz mechanism and the integrated power reserve helps keep the clock operational during temporary power interruptions.

230-volt power supply

The time switch operates with a 230-volt AC power supply and supports a frequency of 50 or 60 hertz.

Electrical supply is connected from the top of the device, following the wiring diagram provided by Legrand.

Compact 1-module format

The Legrand 412790 occupies only 1 module of 17.5 millimeters width, allowing it to be installed in electrical panels with minimal space usage.

It is designed for DIN rail mounting and can be installed alongside miniature circuit breakers, residual current devices, contactors, and other modular control and protection devices.

Dimensions of the Legrand 412790

The dimensions specified by the manufacturer are:

• Width: 17.5 millimeters.
• Height: 83 millimeters.
• Depth: 60 millimeters.
• Number of modules: 1.

Its especially compact format makes it easy to add time programming even in panels with limited modular space.

Terminals for conductors up to 4 square millimeters

The time switch terminals accept conductors with cross-sections between 1.5 and 4 square millimeters.

The device also includes terminal markings to make identification easier during wiring and commissioning.

IP20 protection

Reference 412790 has an IP20 protection rating and is intended for installation inside electrical panels and suitable enclosures.

Its operating ambient temperature ranges from -10 to 55 degrees Celsius, while the permitted storage temperature ranges from -10 to 60 degrees Celsius.

Technical specifications of the Legrand 412790

• Brand: Legrand.
• Reference: 412790.
• EAN: 3245064127905.
• Product type: analog programmable time switch.
• Programming type: daily.
• Programming cycle: 24 hours.
• Dial type: vertical.
• Number of channels: 1.
• Number of outputs: 1.
• Contact type: potential-free normally open.
• Rated switching current: 16 amperes at 250 volts AC.
• Minimum programming: 15 minutes.
• Segment duration: 15 minutes.
• Switching accuracy: plus or minus 5 minutes.
• Power reserve: 100 hours.
• Clock control: quartz.
• Power supply: 230 volts AC.
• Frequency: 50 to 60 hertz.
• Manual selector: ON, AUTO and OFF.
• Summer/winter time change: manual.
• Mounting: DIN rail.
• Number of modules: 1.
• Width: 17.5 millimeters.
• Height: 83 millimeters.
• Depth: 60 millimeters.
• Protection rating: IP20.
• Accepted terminal cross-section: 1.5 to 4 square millimeters.
• Power feed direction: top.
• Operating temperature: -10 to 55 degrees Celsius.
• Storage temperature: -10 to 60 degrees Celsius.
• Integrated accumulator: yes, rechargeable.
• Accumulator technology: nickel-metal hydride.
• Color: gray RAL 7035.

Daily time programming in just 1 module

The Legrand 412790 time switch makes it possible to automate lighting, heating, and other compatible loads on a daily basis using simple analog programming in 15-minute intervals.

Its 100-hour power reserve, 16-amp output, ON–AUTO–OFF manual selector, and compact 1-module format provide a practical solution for installations that need to control repetitive operating schedules directly from the electrical panel.