Commercially available doorbell samples are divided into two types: wired and wireless. The former make up a large group of products that differ in various ways of connecting to the electrical network. Wireless calls are usually considered separately.
Features of wired ringer commutation
There are three known ways to connect a wired call to the electrical network, which differ in the number of switched contacts.
It:
- using a ringer with two terminals (the most common and simple case);
- connecting a bell with 4 terminal connectors;
- connection via a step-down transformer.
Each of the options presented needs to be considered separately.
1. Bell option with 2 terminals
In this case, in addition to the button and the case, it is necessary to prepare 4 conductors of a suitable length and an indicator screwdriver (to determine the phase conductor).
Next, you need to carry out the following operations:
- By means of the machine, "remove" the 220 Volt power supply from the junction box above the entrance door, through which it is planned to switch the bell and button wires.
- Then you need to stretch one pair of previously prepared wires from the junction box to the bell, and the second from it to the button.
- Having connected the ends to the terminals according to the above photo, it remains to correctly disconnect them inside the box.
The phase wire, laid from the shield, is located either by the red color of the insulation, or using an indicator screwdriver.
2. Bell option with four terminals
If the purchased calling kit has not two, but four terminals, it will have to be connected according to a different scheme. In reality, it differs little from the one already discussed; it's just that manufacturers have simplified the installation of connecting wires. In this embodiment, it is not necessary to switch the connections in the junction box.
It is enough to stretch two conductors with a phase and zero from it, and then connect them to the 2nd contact of the bell body (they must have a corresponding designation). Another pair of contacts connects to the bell button. This is done as shown in the photo below:
3. Connecting a bell through a transformer
In a situation where a metal button is included in the kit - for the safety of use, a reduced voltage is supplied to the call (this can be 8, 12 or 24 Volts). That is, for the operation of the circuit, low-voltage control is required (the specific voltage value is specified with the seller). In addition to the button, housing and transformer, the product kit also contains a junction box (see diagram below).
The transformer has a standard size of the machine and is installed in the panel in a free space. Low voltage wires are laid from it to the junction box, after which they are switched with conductors from the button and the bell itself.
4. Wireless option
This is the easiest way to connect a call. When installing the kit, it is enough to fix the case and the button in convenient places, and then install the batteries in them. Such a structure is controlled by a radio channel. A kind of retribution for its simplicity is the need to periodically change the feeding elements. That is, incur additional costs.