Safety apparatus for elevator apparatuses which can move a cab via a drive, wherein the drive can be monitored via a monitoring unit for monitoring the drive, including: a first safety circuit, which has a closed conduction state and an open conduction state, with an interruption apparatus for interrupting the drive depending on the conduction state of the first safety circuit, a safety device, which includes at least two sensors, which can be switched between at least two switching states depending on a state to be detected by the sensors. To provide improved maintenance, a switching unit is provided, which can be switched between at least two switching states by connection to the safety device and is designed to effect the closed and/or open conduction state of the first safety circuit, wherein the switching unit includes a transmission device for transmitting data and/or monitoring signals to the monitoring unit.