Safety switching device for setting a safety-related device to a safe state
First Claim
1. A safety switching device (900) for setting at least one safety-related device into a safe state, the device comprising:
- a first connection device (910) for connecting the safety switching device to a single-phase or multiple-phase power supply device;
at least one second connection device (920) for connecting a safety-related device;
a third connection device (940, 945) for connecting at least one safety-related input stage (760);
a power amplifier (200) that is single-phase or multiple-phase connected between the first and second connection devices (910, 920) with at least one controllable switch contact;
a measurement device (610); and
a safety device (820, 840) for multiple-channel driving of the power amplifier (200);
wherein the safety device (820, 840) comprisesa first control device (820), which has a programmable control unit (822) and which has a device for generating a monitoring signal, anda second control device (840),wherein the input stage (760) is connected to the first control device (820) and to the second control device (840) and is constructed for modulating an input signal with the monitoring signal coming from the first control device (820),wherein the first control device (820) and/or the second control device (840) set the safety-related device into a predetermined safe state in response to the modulated input signal, if a fault occurs, andwherein the first control device (820) is allocated to the measurement device (610) and is constructed such that it sets the safety-related device into a predetermined safe state via the power amplifier (200) as a response to a measured analog signal, if a predetermined parameter of the measured analog signal lies outside a predetermined operating range.
1 Assignment
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Accused Products
Abstract
A safety switching device, with which a safety-related device, can be set into a safe state. The safety switching device has a microprocessor or microcontroller, which can set an electric drive to be protected into a safe state both if an emergency circuit breaker, protective door switch, and/or two-hand switch is activated and also if there is faulty operation of the safety-related device or electric drive. For this purpose, the microprocessor is implemented such that it can determine from at least one analog signal to be measured whether a predetermined parameter lies outside a predetermined operating range. In addition, the microprocessor can be a component of a safety device which is constructed for multiple-channel control of a safety-related electric drive. In this way, the safety switching device can respond to several safety functions independent of each other in order to set an electric drive into a safe state.
17 Citations
25 Claims
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1. A safety switching device (900) for setting at least one safety-related device into a safe state, the device comprising:
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a first connection device (910) for connecting the safety switching device to a single-phase or multiple-phase power supply device; at least one second connection device (920) for connecting a safety-related device; a third connection device (940, 945) for connecting at least one safety-related input stage (760); a power amplifier (200) that is single-phase or multiple-phase connected between the first and second connection devices (910, 920) with at least one controllable switch contact; a measurement device (610); and a safety device (820, 840) for multiple-channel driving of the power amplifier (200); wherein the safety device (820, 840) comprises a first control device (820), which has a programmable control unit (822) and which has a device for generating a monitoring signal, and a second control device (840), wherein the input stage (760) is connected to the first control device (820) and to the second control device (840) and is constructed for modulating an input signal with the monitoring signal coming from the first control device (820), wherein the first control device (820) and/or the second control device (840) set the safety-related device into a predetermined safe state in response to the modulated input signal, if a fault occurs, and wherein the first control device (820) is allocated to the measurement device (610) and is constructed such that it sets the safety-related device into a predetermined safe state via the power amplifier (200) as a response to a measured analog signal, if a predetermined parameter of the measured analog signal lies outside a predetermined operating range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A safety device for multiple-channel control of a safety-related device, comprising:
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a first microprocessor-controlled control device (770;
820), which has a signal generating device (772;
822) for generating a monitoring signal;a second control device (800;
840); andan input stage (760), which is connected to the first microprocessor-controlled device (770;
820) and to the second control device (800;
840) and which is constructed for modulating an input signal with the monitoring signal coming from the first microprocessor-controlled control device (770;
820);wherein the first microprocessor-controlled control device (770;
820) and/or the second control device (800;
840) set the safety-related device into a predetermined safe state in response to the modulated input signal, if a fault occurs. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification