SU921112A1 - Switching device - Google Patents

Description

(54) SWITCH

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The invention relates to switching. Noah technique and can be used as a device connection when checking the accuracy and electrical parameters of the installation of electronic equipment (REA), V; including printed circuit boards.

Known multi-channel relay switch containing switching and additional electromagnetic relays and their contact groups 1.

The disadvantage of this device is that it only allows to detect breaks in the tested circuits, whereas with modern complex structures of both bulk and printed wiring, for example in multilayer printed circuit boards, control of short circuits (short circuits) is also necessary. .

A switch is also known that contains a switching relay in each channel, one output of its winding is connected to a corresponding control region, and a switching group of contacts, an operating relay, one connection of which winding is connected to the first power supply terminal, and the other through the switching contact contacts to the second power supply terminal. power, and the closing and opening contacts 2.

The disadvantage of this switch is that when the signal is removed from the control region, both relays return to the initial state, i.e. the switch does not remember already narrowed channels and does not exclude them from further consideration. When using it as a device, connecting to control the installation structures of the power steering, this disadvantage does not allow finding short circuits between the tested circuits, and the control is reduced only to the detection of breaks in these flail x The purpose of the invention is to increase the reliability of the operation and enhance the functional capabilities.

Claims (2)

The goal is achieved in that a switch containing a switching relay on each channel, the first winding terminal of which is connected to the corresponding control panel, and a switching group of contacts, an executive relay, the first winding terminal of which is connected to the first power source thickness and the second through a make contact the enable relay is connected to the second power supply bus, and the closing and disconnecting contacts, as well as the input and output voltages, are added to the additional output power and the third power supply, and the input power and each channel connected in series through respective normally closed contact and a switching point relay group incorporation relay contacts connected to the respective output schinam, wherein the second terminal of relay winding actuator via its make contact connected to the third power source schinoy. The drawing shows a circuit diagram of the device. The device contains winding 1 switching relay, control bus 2, winding 3 actuating relay, power supply bus 4, closing contacts 5 of the switching relay, power supply bar 6, input rails 7, disconnecting contacts 8 of the switching relay, switching groups of the switching contacts 9 of the switching relay, output 10 and 11, the closing contacts 12 of the executive relay and the power supply bus 13. The switch consists of N identical channels united by common women. The number N determines the capacity of the switch, i.e. maximum number of connection points of the tested product. A switch operating as a connection device functions as follows. Input information buses 7 are connected to all points of the tested product, and control buses 2 are fed with selectable channel select signals in accordance with a monitoring program entered, for example, from punched tape. When an address signal is sent to the control bus 2 of any of the channels, the activation relay is activated, and its contacts 5 are closed, preparing the power supply circuit of the winding 3 of the executive relay. The corresponding input information bus 7 through the disconnecting contacts 8 of the not yet switched-on executive relay and the triggered group of switching contacts 9 of the switching-on relay are connected to the output thickness 11, by which the test effect of the tested product is determined (test for interruption). Thereafter, a voltage is briefly applied to the power bus 6, which leads to the operation of the executive relay and its self-blocking through its own closing contacts 12 to the power bus 13. At the same time, the disconnecting contacts 8 of this relay disconnect the input information bar 7 of the polled channel from the output bus I. After removing the address signal from the control bus 2. Winding 1 of the on relay is turned off and its contacts 5 and 9 are reset. wherein the winding 3 of the actuating relay remains on and represents the memory element of the simplified channel. As a result of a similar search of all points (channels) of the circuit under test, except the last one, they are disconnected from the output circuit 10 by the opening contacts of 8 interlocked relays. When monitoring the last point, the winding 3 of the actuating relay is not put on interlock, i.e. power supply bar 6 is not energized. As a result, when the winding 1 of the relay for turning on the channel of the last point is on, the tested circuit is connected to the output bar 11, while the rest of the array of points of the tested product is connected to thickness 10. In case of a short circuit between the tested and the rest circuits, 10 and 11 are connected, otherwise there is no connection between them. After this test is completed, the voltage is removed from the power supply bus 13 and control 2, as a result of which all relays return to their original state, and the monitoring cycle is resumed for the next circuit included in the tested product. Thus, a break is determined for each point of the circuit, and a short-circuit test is performed once per circuit. The switch can be used not only for quality control, but also for monitoring the parameters of the circuit to be tested for the resistance of the connecting conductors (when determining the break) and the insulation resistance between the circuits (when checking for short), which allows a highly reliable parametric control and element-by-element diagnostics of knots, blocks and printed circuit boards with installed passive electrical radio elements. The invention contains a switch containing a switching relay in each channel, the first winding terminal of which is connected to the corresponding control bus, and a switching group of contacts, an executive relay, the first winding terminal of which is connected to the first power source, and the second relay is connected to the switching contact the second power supply bus, and the closing and opening contacts, as well as the input and output bus, characterized in that, in order to increase the reliability of operation and expansion, Opportunities, an additional output bus and a third power supply bus are entered into it, the input bus of each channel connected via a disconnecting contact of the corresponding executive relay and switching on contact group connected to the corresponding output buses, while the second terminal of the executive relay coil is connected through its own closing contact with a third bus power source. "about I I I I I I I ABOUT) “About № № JU .NT "about I ( I I I I I (I I I I J n Sources of information taken into account in the examination 1. The author's certificate of the USSR 468383, cl. H 04 L 13/12, 1973. 2. Author's certificate of the USSR 633147, cl. H 04 L 13/12, 11.04.77.