Drive of an elevator system

A drive for an elevator system, the drive comprising:

• an electric machine adapted to rotate for moving an elevator car of the elevator system;
• a converter electrically connected to the electric machine to provide energy from an alternating current source to rotate the electric machine;
• a drive controller controlling the converter;
• a drive safety circuit unit electrically connected to a safety circuit of the elevator system, to a controller of the elevator system, and to the drive controller;
• a mechanical brake that is closed by a brake closing command of the controller of the elevator system to stop the rotation of the electric machine;
• wherein the drive safety circuit unit is adapted to operate in a first operating state and in a second operating state;
• and
• wherein the drive safety circuit unit operates in the first operating state to transmit an emergency stop command generated by the safety circuit of the elevator system directly and without delay to the converter to close the mechanical brake, and operates in the second operating state to transmit the emergency stop command from the safety circuit of the elevator system to the converter with a delay.