Transport conveyor drive having a rectifier and an inverter which are connected via a DC link, whereby the inverter comprises power switches for suppling electric power to an transport conveyor motor, the transport conveyor drive comprises: - a motor controller for controlling the power switches of the inverter which is configured to produce control pulses in the control poles of the power switches, - at least one safety signal interface, which is adapted to receive safety signals from a safety controller of the transport conveyor, and - a brake control circuit having an output for supplying power to a brake coil of an electromagnetic brake, wherein - the motor controller is referenced to a first bus bar in the DC link - at least one STO circuit (50, 52) is connected between the motor controller and each of the power switches of at least one half bridge of the inverter, which STO circuit (50, 52) is configured to transfer/cut the control pulses generated by the motor controller to the power switches, the STO circuit (50, 52) being referenced to the first bus bar of the DC link, - a second galvanically isolated power supply for the STO circuit (50, 52) is connected between the safety signal interface and the STO circuit (50, 52), such that an input terminal of the second power supply is referenced to ground whereas an output terminal of the second isolated power supply is referenced to the same bus bar of the DC link as the motor controller, - whereby the STO circuit (50, 52) is configured to transfer/cut the control pulses to the power switches dependent on the power received from the isolated power supply (15, 42), - the second isolated power supply being controlled via at least one safety signal received via the safety signal interface, and/or - the brake control circuit comprising: - a transformer with a primary and a secondary side, the transformer primary side being referenced to a/the first bus bar (DC-, -) of the DC link and the secondary side being configured to be connected to a brake coil of an transport conveyor brake, - a modulating semiconductor switch in the transformer primary side, - a brake controller connected to the modulating semiconductor switch and being configured to generate control pulses for said semiconductor switch, the brake controller being referenced to the first bus bar of the DC link, - a first isolated power supply is connected between the safety interface and the brake controller to supply power to the brake controller, whereby an output terminal of the first isolated power supply is referenced to the same bus bar of the DC link as the brake controller. - a motor controller for controlling the power switches of the inverter which is configured to produce control pulses in the control poles of the power switches, - at least one safety signal interface, which is adapted to receive safety signals from a safety controller of the transport conveyor, and - a brake control circuit having an output for supplying power to a brake coil of an electromagnetic brake, - the motor controller is referenced to a first bus bar in the DC link - at least one STO circuit (50, 52) is connected between the motor controller and each of the power switches of at least one half bridge of the inverter, which STO circuit (50, 52) is configured to transfer/cut the control pulses generated by the motor controller to the power switches, the STO circuit (50, 52) being referenced to the first bus bar of the DC link, - a second galvanically isolated power supply for the STO circuit (50, 52) is connected between the safety signal interface and the STO circuit (50, 52), such that an input terminal of the second power supply is referenced to ground whereas an output terminal of the second isolated power supply is referenced to the same bus bar of the DC link as the motor controller, - whereby the STO circuit (50, 52) is configured to transfer/cut the control pulses to the power switches dependent on the power received from the isolated power supply (15, 42), - the second isolated power supply being controlled via at least one safety signal received via the safety signal interface, and/or - the brake control circuit comprising: - a transformer with a primary and a secondary side, the transformer primary side being referenced to a/the first bus bar (DC-, -) of the DC link and the secondary side being configured to be connected to a brake coil of an transport conveyor brake, - a modulating semiconductor switch in the transformer primary side, - a brake controller connected to the modulating semiconductor switch and being configured to generate control pulses for said semiconductor switch, the brake controller being referenced to the first bus bar of the DC link, - a first isolated power supply is connected between the safety interface and the brake controller to supply power to the brake controller, whereby an output terminal of the first isolated power supply is referenced to the same bus bar of the DC link as the brake controller.