An access control system comprising a radio network and a plurality of electrical access control components (24, 26), wherein the radio network comprises a plurality of access control radio nodes, of which each comprises: - a radio communication device; - at least one component interface for connecting one of the plurality of access control components (24, 26); - a control device; and - a storage device in which system control software and an application control program module are stored, with at least one communication protocol and an interpreter for the application control program module being included in the system control software, and with the application control program module including rules for defining a functional scope of the access control radio node; wherein the control device of the respective access control radio node is adapted - to communicate with other ones of the plurality of access control radio nodes via the radio communication device in accordance with the communication protocol included in the system control software; - to receive the application control program module as a whole via the radio communication device and to store it in the storage device; - to execute the stored application control program module by means of the interpreter included in the system control software; and - to generate output signals, which are output via the radio communication device or the component interface, in dependence on input signals, which are received via the radio communication device or the component interface, in accordance with the executed application control program module; wherein the control device of the respective access control radio node is adapted to generate an output signal, which includes the control instruction, on the basis of a received input signal, which includes a control instruction for at least one other of the plurality of access control radio nodes, in accordance with the executed application control program module and to transmit the generated output signal via the radio communication device to the at least one other access control radio node; wherein the control device of the respective access control radio node is further adapted to generate an output signal, which includes a control command for implementing the control instruction, on the basis of a received input signal, which includes a control instruction for a connected access control component (24, 26), in accordance with the executed application control program module and to output the generated output signal via the component interface to the connected access control component (24, 26); wherein the control device of an access control radio node having a connected door opening component is adapted to receive an instruction for arming an intrusion alarm system, having a control center integrated into the access control system, from the connected door opening component and to transmit it to an access control radio node which is connected to the control center of the intrusion alarm system; wherein the control device of the access control radio node connected to the control center is adapted, after receiving the instruction for arming, to initiate the arming of the intrusion alarm system by transmitting an arming signal to the control center of the intrusion alarm system and, in order to implement the inevitability of the intrusion alarm system, to transmit permanently closed instructions, which serve to transfer a connected door opening component into a closed state which can only be departed by a previous disarming of the intrusion alarm system, to further access control radio nodes to which access control components are connected which serve to monitor the outer skin of a building through the access control system. - a radio communication device; - at least one component interface for connecting one of the plurality of access control components (24, 26); - a control device; and - a storage device in which system control software and an application control program module are stored, with at least one communication protocol and an interpreter for the application control program module being included in the system control software, and with the application control program module including rules for defining a functional scope of the access control radio node; - to communicate with other ones of the plurality of access control radio nodes via the radio communication device in accordance with the communication protocol included in the system control software; - to receive the application control program module as a whole via the radio communication device and to store it in the storage device; - to execute the stored application control program module by means of the interpreter included in the system control software; and - to generate output signals, which are output via the radio communication device or the component interface, in dependence on input signals, which are received via the radio communication device or the component interface, in accordance with the executed application control program module;