Cooling fan with dry contact output alarm function

1. The definition of dry contact: passive switch; it has two states of closed and open; there is no polarity between the two contacts and can be interchanged; common dry contact signals include: various switches such as limit switches, Travel switch, foot switch, rotary switch, temperature switch, liquid level switch, etc.; 2. Common dry contact output methods are: relay and dry reed switch output; 3. Cooling fan with dry contact output alarm function is currently being developed by us The fan with alarm function outputs the dry contact mode, and the relay is integrated in the fan, which can communicate with the client's PLC host to monitor the fan status in real time; 1. Relay mode: When running, the relay is normally closed, that is, yellow and blue When the fan is not energized or the fan is abnormal, the relay is normally open, that is, the yellow wire is disconnected from the blue wire and the fan is powered on and works normally, and the relay is closed for 300ms. The client needs to reserve this time before testing; the relay Basic information (Relay basic information): Brand: Omron Life: Switching times: 1*105 times Temperature range (temperature range): -40°C~75°C 4. Customer customization is acceptable, such as: Realize the fan forward and reverse function, as well as the LED indicator, abnormal red light, normal green light, and so on. . . Cooling fan with dry contact output alarm function