SU919105A2 - Device for remote monitoring of distant power supply of unattended amplifying stations - Google Patents

Description

(54) REMOTE POWER SUPPLY TELEVISION DEVICE UTILIZED AMPLIFIED The invention relates to a technique of telecommunication and can be used with 3 control devices of cable communication lines equipped with intermediate amplifiers. According to the main auth. No. 67868, a remote control power supply monitoring device for unattended amplifying stations, comprising an amplifier, control and switching units connected in series, the first inputs of which are connected to the amplifier power supply input, a loop resistor, one end of which is connected to the output of the switching unit and the other to the common return wire of the remote power supply, to which another input of control unit 1 is also connected. However, the known device has a low accuracy telecontrol. The purpose of the invention is to improve the accuracy of telecontrol by making it possible to determine the maintenance-free amplifying point. ITEMS This goal is achieved by introducing an And element, two isolation transformers, two capacitors and two optocoupler transducers into a known telecontrol unit for remote powering unattended amplifying points, with a capacitor connected in parallel with its inputs in each optocoupler, and the first inputs of optocoupler transducers are information inputs of the device, the second inputs are connected to the linear winding of the first isolation transformer, the midpoint of the linear windings of which are connected to the first input of the control unit, with the first outputs of the first and second optocoupler converters, the second outputs of which are connected to other inputs of the element I, the auxiliary input of which is connected to the output of the amplifier and the midpoint of the linear winding of the second separation transformer, the outputs of the last

3E1

These are the information outputs of the device, the output of the And element is connected to the second input of the control unit, the station windings of the first and second isolation transformers are connected respectively to the information (1 input inputs and outputs of the amplifier.

The drawing shows a structural electrical circuit of the proposed device.

The remote control telecontrol device of the unmanaged amplifying points contains amplifier 1, first and second isolation transformers 2 and 3, respectively, element k 11, control unit 5, switching unit 6, common direct wire 7 of remote supply, loop resistor 8, common return wire 9 of remote power, wire 10 and

11 information input wires

12 and 13 information output, two optocoupler 14 and 15, two capacitors 16 and 17.

The device works as follows.

During normal operation, the direct current of the remote power supply, flowed through the input circuits of the optocoupler transducers and 15, keeps them in the on state. In this case, their outputs will be signals corresponding to the logical K. The same signal creates a voltage drop in the power supply circuit of amplifier 1, Since J as at all inputs of element 4 And is logical 1, then at its height there will be a signal corresponding to logical 1. what causes the output of the signal control unit 5 to turn off the switching unit 6 of the switching. A complete break of a cable pair or one of its wires will result in either all or one of the inputs of the AND logical zero, which terminates the signal at the output of control unit 5 and causes the switching unit 6 to turn on, resulting in a remote power supply through a resistor 8 plumes.

four

Thus, the proposed device makes it possible to determine the location of the break even of a single cable wire, without leading to the loss of the current of the remote power supply.

Claims (1)

Invention Formula A remote control telecontrol device for unattended amplifying stations according to the author .N678684, characterized in that, in order to improve the telecontrol by allowing the unattended amplifying point to be detected with a break in one of the line wires, an And element, two separation transformers, two condensates and two optocoupler, while in each optocoupler transducer parallel to its inputs 1 is connected a capacitor, with the first inputs of optocoupler transducers being inf The device's inputs, the second inputs are connected to the linear winding of the first isolation transformer, the midpoint of the linear winding of which is connected to the first input of the control unit, to the first outputs of the first and second converters, the second outputs of which are connected to the other inputs of the And element, the additional input of which is connected with the amplifier output and the midpoint of the linear winding of the second isolation transformer, the outputs of the latter are information outputs of the device, the output elements and a second input connected to a control unit, a winding station a first and second isolating transformers are respectively connected to data inputs and outputs of the amplifier I Information sources ., taken into account in the examination 1 „Copyright; certificate of the USSR N 67V684, class, AND 04 3/46, 1977 (prototype).