A safety device (10, 30, 40, 50), in particular a safety control apparatus and/or a safety diagnosis apparatus, for industrial automation, including a logic voltage zone (4), a load voltage zone (5) which is galvanically separated from the logic voltage zone (4), a transmission unit (6) for transmitting a communication signal between the logic voltage zone (4) and the load voltage zone (5) whilst maintaining the galvanic separation, a first voltage supply connection (7) for providing a first supply voltage (V1) for the logic voltage zone (4) and a first current limitation element (8), wherein the transmission unit (6) is connected on the first voltage supply connection (7) via the first current limitation element (8) and is fed from the first voltage supply connection (7) via the first current limitation element (8).