Safety or Security door with a modular door movement system and having - an electric motor, - a drive for moving the security door from a first position in which the security/safety door opens a passage to a second position in which the security/safety door closes the passage, - an electrical control system, with a main electrical module connected to a main power supply via a mains connection, - a first add-on module, - at least one second add-on module and - at least one energy storage, preferably at least two energy storages, - wherein the main electrical module comprises the mains connection and at least one, preferably several outputs, and the at least one output has a voltage independent of different maximum currents for this output, wherein -- the main electrical module is adapted to provide electrical energy via the at least one output for the electric motor if the main power supply system is intact, and to charge the at least one energy storage of the control system, -- in the event of a failure of the main power supply network the at least one energy storage supplies own power/current for operating the security/safety door arrangement, and -- if the energy storage device is empty, the security/safety door is openable and closable via a manually operated device, - the drive comprises a hydraulic positioning or adjusting device, - at least one energy storage device is an accumulator or a battery and the security/safety door is a watertight security/safety door of a watercraft. - an electric motor, - a drive for moving the security door from a first position in which the security/safety door opens a passage to a second position in which the security/safety door closes the passage, - an electrical control system, with a main electrical module connected to a main power supply via a mains connection, - a first add-on module, - at least one second add-on module and - at least one energy storage, preferably at least two energy storages, - wherein the main electrical module comprises the mains connection and at least one, preferably several outputs, and the at least one output has a voltage independent of different maximum currents for this output, wherein -- the main electrical module is adapted to provide electrical energy via the at least one output for the electric motor if the main power supply system is intact, and to charge the at least one energy storage of the control system, -- in the event of a failure of the main power supply network the at least one energy storage supplies own power/current for operating the security/safety door arrangement, and -- if the energy storage device is empty, the security/safety door is openable and closable via a manually operated device, - the drive comprises a hydraulic positioning or adjusting device, - at least one energy storage device is an accumulator or a battery and the security/safety door is a watertight security/safety door of a watercraft. -- the main electrical module is adapted to provide electrical energy via the at least one output for the electric motor if the main power supply system is intact, and to charge the at least one energy storage of the control system, -- in the event of a failure of the main power supply network the at least one energy storage supplies own power/current for operating the security/safety door arrangement, and -- if the energy storage device is empty, the security/safety door is openable and closable via a manually operated device, - the drive comprises a hydraulic positioning or adjusting device, - at least one energy storage device is an accumulator or a battery and the security/safety door is a watertight security/safety door of a watercraft.