Abstract: Gateway device (100), adapted to couple a first network with a second network, comprising: a first network interface device (102) coupled by a first interface to a first network and having a second interface; a second network interface device (104) coupled by a first interface with the second network and having a second interface; a network coupling device (103) adapted to transmit in a first status no data from the second interface of the second network interface device (104) to the second interface of the first network interface device (102) on the physical layer and adapted to transmit in a second status data from the second interface of the first network interface device (102) to the second interface of the second network interface device (104); wherein said network coupling device (103) includes a switching device (126, 128) coupled to a conductor (130, 134) coupling the second interface of the first network interface device (102) and second network interface device (104); wherein the switching device (1

Abstract: A backup device (100) is adapted to conduct a backup of a control device (200), with an interface (104), which may be coupled with the control device (200); a transmission unit (102), adapted to read data from the control device (200) via the interface (104) and/or write data to the control device (200) via the interface (104); a memory unit (108, 116), adapted to store the data read from the control device (104); a backup control unit (102) adapted to instruct the transmission unit (102), to read at least part of a program memory (208) of the control device (200) as first program backup data (120), and to instruct the memory unit (108, 116) to store the first program backup data (120) in a non-volatile way, wherein the backup control unit (102) is further adapted to instruct the transmission unit (202) to read at least part of a program memory (208) of the control device (200) as further program backup data (122, 122a); a comparison unit (102) adapted to compare the first program backup data (120) and the fu