Wiring mode and circuit diagram of Intermediate Switch
In GB16915.1, the intermediate switch is called: dual-control reversing switch (or multi-control switch), and there are also common names on the market: midway switch and halfway switch.
The standard is called the intermediate switch, as the name implies, it is the switch used in the middle.
To introduce the multi-control switch, you must first understand the dual-control switch. The following first introduces the wiring method of the dual-control switch (or two-way switch):
The common place for dual-control switches is that two dual-control switches control one light at the same time.
For example, in the upper left picture, when you go upstairs, press the dual control switch K1, and the light in the middle is on; when you walk upstairs to enter the door, press the dual control switch K2 to turn off the light in the middle. This method is used in long corridors, bedroom entrances and bedside control of bedroom lights, etc.
The upper right picture is the wiring diagram of the dual control switch.
Remarks: Connecting the dual-control switch to one channel as a single-control switch is not included here.
Everyone understands the use of dual-control switches, that is, if two switches control one light at the same time. Then the problem arises. I want to do if 3 switches or more than 3 switches control one light? Thus, the intermediate switch was born, which is used in the middle of two dual-control switches, so that 3 or more switches can control a light at the same time.
For example, in the picture above, a relatively long corridor, people come from the left:
1: Press the switch K1, the light is on, when you enter the first door, press the dual control switch K1, the light is off;
2: Press the switch K1, the light is on, and press the multi-control switch K3 when entering the second door, the light is off;
3: Press the switch K1, the light is on, and press the dual-control switch K2 when entering the third door, the light is off;
Of course, the same goes for people from the right side, but the switch sequence is reversed.