Intelligent safety relay and circuit applied thereby

A relay application circuit, comprising:

• an intelligent safety relay, comprising:
• a first processing chip MCU A, comprising:
• first to tenth pins;
• and a second processing chip MCU B, comprising:
• eleventh to twentieth pins;
• a first input driving circuit, having an input end connected to the first pin of the first processing chip MCU A and an output end that leads out a first control end S11;
• a second input driving circuit, having an input end connected to the eleventh pin of the second processing chip MCU B and an output end that leads out a second control end S21, wherein the first control end S11 and the second control end S21 output a first driving signal and a second driving signal respectively, the first driving signal and the second driving signal are periodic pulse signals having different waveforms;
• a first input sampling circuit, having an input end connected to a first sampling end S12 and an output end connected to the second pin of the first processing chip MCU A and the twelfth pin of the second processing chip MCU B;
• a second input sampling circuit, having an input end connected to a second sampling end S22 and an output end connected to the third pin of the first processing chip MCU A and the thirteenth pin of the second processing chip MCU B;
• a third input sampling circuit, having an input end connected to a third sampling end S34 and an output end connected to the fourth pin of the first processing chip MCU A and the fourteenth pin of the second processing chip MCU B, wherein part of the first sampling end S12, the second sampling end S22, and the third sampling end S34 are coupled to S11 and the rest is coupled to the S21, so as to sample signals;
• when information is sampled, a sampling signal recognizable to the first processing chip MCU A is generated and inputted to the first processing chip MCU A, and a sampling signal recognizable to the second processing chip MCU B is generated and inputted to the second processing chip MCU B, so that the first processing chip MCU A and the second processing chip MCU B, when receiving the sampling signal, control the intelligent safety relay to stay in an output ready state;
• wherein the fifth pin of the first processing chip MCU A is connected to the fifteenth pin of the second processing chip MCU B to form a first data channel, the fifth pin is a data transmitting end, and the fifteenth pin is a data receiving end;
• the sixth pin of the first processing chip MCU A is connected to the sixteenth pin of the second processing chip MCU B to form a second data channel, the sixth pin is a data receiving end, and the sixteenth pin is a data transmitting end;
• and
• the seventh pin of the first processing chip MCU A is connected to an input end of a first diagnostic signal generation circuit;
• the seventeenth pin of the second processing chip MCU B is connected to an input end of a second diagnostic signal generation circuit;
• a diagnostic signal detection circuit, having a first output end connected to the eighth pin of the first processing chip MCU A, a second output end connected to the eighteenth pin of the second processing chip MCU B, and an input end;
• a first logic circuit, having a first input end connected to the ninth pin of the first processing chip MCU A, a second input end connected to the tenth pin of the first processing chip MCU A, and an output end connected to an input end of a first relay driving circuit, wherein an output end of the first relay driving circuit is connected to a first relay coil of a first relay circuit, and the first relay circuit further comprising:
• a first normally closed contact NC connected to an output end of the first diagnostic signal generation circuit, a first normally open contact NO connected to a first relay output end, and a first common contact G connected to the input end of the diagnostic signal detection circuit, wherein the first logic circuit is configured to perform a logical operation according to input signals at the ninth pin and the tenth pin of the first processing chip MCU A, to obtain a first on-off control signal to cause the first relay driving circuit to drive the first relay coil to be powered on or powered off, so that the first common contact G is electrically connected to the first normally closed contact NC or the first normally open contact NO;
• and
• a second logic circuit, having a first input end connected to the nineteenth pin of the second processing chip MCU B, a second input end connected to the twentieth pin of the second processing chip MCU B, and an output end connected to an input end of a second relay driving circuit, wherein an output end of the second relay driving circuit is connected to a second relay coil of a second relay circuit, and the second relay circuit further comprising:
• a second normally closed contact NC connected to an output end of the second diagnostic signal generation circuit, a second normally open contact NO connected to a second relay output end, and a second common contact G connected to the input end of the diagnostic signal detection circuit and the first common contact G, wherein the second logic circuit is configured to perform a logical operation according to input signals at the nineteenth pin and the twentieth pin of the second processing chip MCU B, to obtain a second on-off control signal to cause the second relay driving circuit to drive the second relay coil to be powered on or powered off, so that the second common contact G is electrically connected to the second normally closed contact NC or the second normally open contact NO;
• wherein the electric connection between the first common contact G and the first normally open contact NO, and the electric connection between the second common contact G and the second normally open contact NO conduct the first relay output end with the second relay output end;
• an emergency stop switch S1, comprising:
• two groups of normally closed contacts, which are connected to a circuit between S11 and S12 and a circuit between S21 and S22 respectively;
• a reset switch S2, comprising:
• a group of normally open contacts, connected to a circuit between S12 and S34;
• a power supply, connected in a loop between a first relay output end and a second relay output end;
• and
• contactors K3 and K4, connected in parallel in a loop between the first relay output end and the second relay output end so as to be powered on or powered off when the first relay output end and the second relay output end are connected or disconnected, wherein K3 and K4 are connected in power supply circuits of different phases of a motor M respectively, and power-on or power-off of K3 and K4 causes the power supply circuits in which K3 and K4 are located to be connected or disconnected, so that the motor M is powered on or powered off.