| 摘要 |
The invention relates to a safety switching unit, with which a safety device, preferably an electric drive, can be controlled into a safe state. The safety switching unit (900) comprises a microprocessor or microcontroller (822) that, for example, can control an electric drive to be protected both when actuating an emergency switch, protective door switch and/or two-hand switch as well as during a faulty operation of the safety switching unit or of the electric drive into a safe state. To this end, the microprocessor (822) is preferably designed so that it can determine from at least one analog signal to be measured whether a predetermined parameter, preferably the amplitude of the analog signal, lies outside a predetermined operating range. In addition, the microprocessor (822) can be a component of a safety device (810), which is configured for the multichannel controlling of a safety electric drive. This enables the safety switching unit (900) to be able to respond to a number of safety functions that are independent of one another in order to control an electric drive into a safe state. In addition, the risk of a wiring error in a compact safety switching unit is considerably reduced compared to known measures. |
