SU999165A1 - Redundancy logic module - Google Patents

Description

The invention relates to automatic control and can be used in relay logic devices with increased reliability. A relay logic module is known that contains a three-winding relay, the output of each winding of which is connected to the common bus, and the inputs to the corresponding input terminals of the module 13. The relay module has a low liade of operation. Thus, in case of failures of the type of breakage of a winding with a false value of any one of the three logical variables equal to O, the majority function is not implemented. The closest to the invention is a relay logic module containing a diode and a three-winding relay, the output of each winding of which is connected to a common busbar, and the inputs to the corresponding input terminals of the module, the inputs of the second and third windings are connected to the first views of the corresponding make contacts, the second The outputs of which are connected to the output terminal of the module, the first output of one of the additional disconnecting contacts through the diode is connected to the input of the third winding, the first end of the other additional disconnecting contact along The key to the additional input terminal, and their second vtody connected to the additional output terminal unit 2 J. The disadvantage of the module is low reliability, for example, when implementing a majority function, for example, if any element of type breakage fails and if one logical variable O is false. The purpose of the invention is to increase reliability, in particular, reliable implementation of majority function. This goal is achieved by the fact that in a redundant relay logic module containing diodes and three electromagnetic relays, one pins

each winding of which is connected to the common bus and the others to the corresponding input terminals of the module, the first and third input terminals are connected to the second input terminal through appropriate diodes, and a third input terminal is connected to the first output terminal of the first relay to the first output terminal. the closing contact of the second relay is connected to the fourth input terminal of the module, and the first input terminal is connected via the first closing contact of the third relay to the second output terminal of the module, which through the second open ayuschy contact of the first relay is connected to a fifth input terminal of the modulator, through the second break contact of the third relay - a sixth input terminal of the modulation and through the break contact of the second switch - to the seventh terminal module.

The drawing shows a diagram of the module.

The circuit contains windings 1-3 of the first, second and third relays; the first, second, third, fourth, fifth, sixth and

the seventh input terminals 4-10 module, respectively; common bus 11; terminal 12, first output; the second output terminal 13; developmental disds 15 and 14; closing contacts 16-20; break contact 21,

Contacts 16 and 19 - the first and second closing contacts of the first relay; 18 and 20 - the first and second closing contacts of the third relay; 17- closing contact of the second relay, and 21 - opening contact of the second relay. Community 11 is connected to the negative potential of the power source.

The redundant relay logic module operates as follows.

In the initial state, windings 1-3 are de-energized. The majority function is realized when two logical ones are submitted. variables 1 to the input terminals of the module 4 and 6, respectively, and the third logical variable 1 to the input terminals 7-9 of the module simultaneously. The values of the majority function are removed completely from both the output terminal of module 12 and the output terminal of module 13. When a winding of the anode or contact occurs and at any value of one of the three input logic variable equal to 0, the majority function is fully implemented on one of the output terminals of the module, so is the reservation of the implementation of the majority function.

In addition, the majority function is implemented with some combinations of failures such as breakage of several elements, all this significantly increases the reliability of the moaul.

The redundant relay logic module also allows for the implementation of redundant logical functions AND and OR, sets of logical functions BAN AND AND, EQUITY and OR OR OR NOT and OR a whole series of others, including logical functions of several variables.

The truth tables for logical functions and their sets are shown below: major prohibition and AND, DIFFERENCE and OR OR-NOT and OR, etc.

To implement the last two sets plus a power source, they are fed to the input terminals 7 and 10 of the module.

Claims (2)

Terminals Thus, the redundant relay logic module implements the backup functions of the majority AND and OR, and also allows you to simultaneously implement sets of logical functions of two and several variables, for example, BAN AND AND, EQUALITY and OR OR NOT, and OR, which will significantly increase its reliability and significantly expands its functionality. Claims of the invention Redundant relay logic module containing diodes and three electromagnetic relays, some of which each winding are connected to an oh bus and others to the corresponding input terminals of the module, characterized in that, in order to ensure reliable power, the first and third input terminals The corresponding diodes are connected to the second input terminal, a third input terminal is connected via the first short-circuiting contact of the first relay to the first terminal of the module, which through the second turn turn pin It is connected to the fourth input terminal of the module, and the first input terminal is connected via the first closing contact of the third relay to the second output terminal, which through the second contact of the first relay is connected to the fifth input terminal of the module, and to the sixth input terminal of the third relay and through the disconnecting contact of the second relay - to the terminal module. Sources of information taken into account during the examination 1. USSR author's certificate No. 7237ai, N OZ K 19 / O2f 1980. 2. USSR author's certificate for application number 2981881 / 18-21, cl. N OZ K 19 / O2, 19.09.8O (prototype).