Device for detecting the wiring at a safety input

A device having a group of terminals for hooking up a first or a second signal-outputting mechanism, wherein the group of terminals comprises at least one first evaluation terminal, which is set by a first potential sensor to a first potential, which depends on a first resistance of the first signal-outputting mechanism between the first evaluation terminal and another one of the group of terminals, and wherein the group of terminals includes at least one second evaluation terminal, which is set by a second potential sensor to a second potential, which depends on a second resistance of the second signal-outputting mechanism between the second evaluation terminal and another one of the group of terminals,

• the first evaluation terminal being connected directly with an inverting input of the first potential sensor, wherein a non-inverting input of the first potential sensor is connected to another first evaluation terminal via a first resistor,
• the second evaluation terminal being connected directly with a non-inverting input of the second potential sensor, wherein an inverting input of the second potential sensor is connected to another second evaluation terminal via a second resistor,
• wherein the first potential is low if the first resistance is low-ohmic, and the second potential is high if the second resistance is low-ohmic.