Device for eliminating long-distance transmission voltage drop of low-voltage direct-current signal

The utility model discloses a device for eliminating long-distance transmission voltage drop of a low-voltage direct-current signal. The control cabinet comprises a control cabinet power supply, a digital quantity output module and a control cabinet relay connected with the output end of the digital quantity output module, wherein the remote relay KA2 is connected with the output end of the remotepower supply, a main contact of the control cabinet relay KA1 is connected with the remote power supply, a main contact of the remote relay KA2 is connected with a contactor KM in series, and a maincontact of the contactor KM is connected with the receiving end of remote control equipment; the beneficial effects of the utility model are that the device is flexible and simple in installation, canbe automatically controlled or manually controlled, is low in requirements for the on-site environment, is simple and quick in fault reason searching after a fault occurs, can solve a problem that aDC24V voltage drop is obviou