Digital Timer Switches Wiring Diagram


The control points are push buttons with indicator light to be able to locate them in case of extinction.

A time switch also known as a timer contactor or simply a timer is a device that controls an electric switch. The time switch is an electronic device that controls the ‘on’ and ‘off’ time of electrical equipment. The electronic timer switch can be built into an existing power circuit connected to the mains power, including a relay or a contactor

It is particularly used in the corridors and stairwells of buildings but is also found in individual residential corridors. A simple timer is typically adjustable from 30 sec to 7 min.

Some timers predict a gradual decrease in intensity before stopping. Others, instead of causing the extinction of the lamps, transform them into night lights. The device is installed in the distribution board and can control several push buttons, with lights or not.

The timer makes it possible both to control the lighting from several points distant from each other, and to ensure the lighting for a determined period, that is to say during the normal time of use of the room concerned: long hallway or staircase in general.

The timing of a Legrand timer (our diagram) is thus adjustable from 0.5 to 12 minutes using a button which can be operated with a small screwdriver. Another notched button allows continuous operation if required. It is a kind of programmer on the electrical panel or timer with multiple control buttons.

The timer module can be located near the room concerned or remote from the subscriber panel, which simplifies the wiring of the timer. Parameterised according to its needs, the electric timer is a device that allows one or more electrical circuits to be powered on.

Thus, it is similar to an electric clock that can control the automatic switching on or off of several appliances or electrical outlets. It is therefore a device that will help you a lot in managing your electrical energy consumption. In this article, learn how and how to hook up an electric timer to reduce your electricity bills.

How a timer works

Before being able to make a timer connection, it is essential to be familiar with the operation of this appliance. In fact, the timers were previously placed in metal boxes and operated thanks to an electromagnet and a clock. But, today, this device has seen some improvements that make it more practical and easier to use.

For a timer connection, you will currently find plastic electric timers on the market. This material in which timers are found today makes it easier to attach them to electrical panels. Also, this has made it possible to put on the market several timer designs that are easily hidden in the decoration of your home.

Electrical components:

Some timers have two poles which are connected to the coil implanted in the housing. When the latter is traversed by the electric current, it gives rise to a magnetic field which triggers the energisation of the electric circuit. And it can stay that way depending on the set time.

To facilitate the timer connection, a small button has been placed on the box to facilitate continuous powering of the circuit. In the same way, you will also find a rheostat for the adjustment of the time of starting of the circuit and its energisation.

Electrical timer connection process

There are many advantages of having an electric timer in your home’s electrical installation system. It provides considerable energy savings since it is programmed to expand automatically. Very often, it is placed in public places, stairwells or any other place where you can easily forget to turn off the lights.

Electric timer wiring

Before starting any timer connection, the very first instinct to have is to switch off the central circuit breaker of the house. This allows you to avoid any risk of electric shock. To be sure, it is necessary to check the actual absence of voltage in the installation system.

After this check, the steps to follow are as follows: Identify the branch circuit breaker that protects the circuit in the electrical panel and place the timer device alongside it; Make the bridge with the red conductor between the phase terminals of the branch circuit breaker and “A1” of the timer;

Connect the “N” terminals of the branch circuit breaker and “A2” to the pushbuttons and lights using a blue conductor; Connect the conductor of the switch to the “B” terminal located at the top of the timer device and pull the wire acting as the return to connect it to terminal 4 of the timer.

Replace the two-way switch with a push-button and connect the phase conductor and a shuttle to the red terminal, and to the grey terminal, the return button and the next shuttle; To complete your timer connection, now connect the two shuttles to the red and grey terminals of the second push-button before moving on to setting the ignition time.

Posted in Electrical Connection, Switch Connection, Electric CircuitTagged Timer connection, Hanger timer connection, Timer wiring,  Timer diagram

How to connect a timer to an electrical panel?

The timer is a modular piece of equipment in the electrical panel that allows you to delay the switching on of an electrical circuit of lights. This timer is to be chosen according to the type of bulb to be controlled and the number of pushbuttons to be installed.

The lighting duration can be adjusted longer or shorter, and some timers have electronic safety in the event of a push-button blockage.

Timer: a guarantee of simplicity and savings

The advantage of connecting a timer to an electrical panel lies in its practicality and economy. By providing one or more lighting circuits with a timer, you ensure that no light is forgotten by a user (ideal for stairwells, cellars, etc.). And if for some reason you need to leave the luminaire on permanently, our timer module has a forced start button and a manual timer setting.

Connection of a 3-wire timer

If you decide to install a timer in an existing electrical box, it is possible that only three wires arrive at the board: install the timer module near the circuit breaker of the lighting circuit from the circuit breaker, connect the neutral to the timer, pushbuttons and lamps connect the circuit breaker phase to the timer

connect the push button return wire and lamps return to the timer

Connection of a 4-wire timer

Under construction or under complete renovation of the electrical installation, 4 wires arrive at the electrical panel. In this case : the neutral goes from the circuit breaker to the timer and to the lights the phase goes from the circuit breaker to the timer and to the pushbuttons  lamps return wire and push button return wire remain connected to the timer.

To control this timer, you can install an unlimited number of non-illuminated pushbuttons or up to 50 illuminated pushbuttons

Choose your timer according to the light

A timer to be connected to an electrical panel must be chosen according to the type and power of the luminaire to be supplied by push-button halogen, compensated fluorescent, compact fluorescent and LED. The connection can be made in 3 or 4 wires depending on the configuration of your installation. You can connect up to 50 light pushbuttons with neon light at 1 mA max.


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