Tag: contactor

Normally Open and Closed Remote Controller for Contactor

Someone would like a remote control to switch on and off his lamp via controlling a contactor. He drew a picture to illustrate his idea. Maybe it is not so convenient to him to remote control lamp directly, so he choose to control his lamp via a contactor.

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We recommend him a 1 channel AC remote switch with memory function (S1MU-AC220+C-2). This 1 channel ac rf memory remote controller operates in toggle, momentary and latched control mode (set the mode as you like freely). With function of memory, if the power is cut off, the relay will return automatically to the previous status after the power is restored. It is great for hard to reach lights or other electrical devices, remote distance up to 100m (theoretically). It is applied to control lights, motors, fans, electrically operated doors / locks / windows / blinds / cars or other appliances with voltage AC 110~240V or DC 0~28V.

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According his requirement, we have this following diagram. Initial state: A, B = Normally Closed; B, C = Normally Open. Wire contactor to normally open contact B&C terminals. And Wire a lamp to contactor and install a switch for lamp (See the original picture).

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There are 3 working mode of remote control. They are toggle, momentary and latched modes. We suggest that he should set latched mode because this remote works with a 2-button transmitter.

Setting control mode Latched: Do not connect Jumper-1 and Jumper-2.

Control mode Latched: Press -> On, another relay Off; Press another button -> Off.

Press button 1: Turn on the contactor to turn on lamp (connect B and C, disconnect A and B)

Press button 2: Turn off the contactor to turn off lamp(disconnect B and C, connect A and B)

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2 Channel Remote Control Switch Lamp On and Off to Test Receiver Work Well

Question from customer:

I want to use the remote control to replace the button of my contactor. Since the switch will be activated rarely, is it possible to test the communication with the remote to be sure that the transmitter’s battery and receiver work correctly?

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Answer:

We came up with a good idea that it can replace your manual switch to remote control contactor and to test whether the transmitter’s battery and receiver work correctly. So we recommend normally open/ closed 2 channel AC remote controller (S2U-AC220+C-2). The normally open/closed contact terminals are applied to universal power supply. In other word, normally open /closed contact terminals are as a switch for device. You need to supply DC or AC power to your controlled devices. The maximum current is 10ampere for each channel and its working distance is about 100m.

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We got a plan for your problem. At first, it is the wiring. Look at the following wiring diagram. A&B terminals are the normally closed terminals. B&C terminals are normally open terminals. Being controlled devices will be connected to normally open terminals. It means that it won’t work in off-state when you disconnect the circuit. We will connect an AC lamp to relay 1 and button of contactor to relay 2. They are supplied to the same power.

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And this receiver works with two-button transmitter. There are four working modes in it. They are Toggle, Momentary, Latched, Momentary + Toggle. We set Toggle mode. You want to make sure the transmitter’s battery and receiver correct working but the switch will be activated rarely. You see, the lamp is for test. When you want to test remote controller, you press button 1, if the lamp is switched on, then the transmitter and receiver work. When you press button 1 again, turn off lamp. Press button 2, turn on the contactor, press button 2 again, turn off the contactor.

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