Bridging field bus module and method for operating a bridging field bus module

A bridging field bus module designed for connecting two field bus networks to each other, wherein a first field bus network of the two field bus networks uses a first safety protocol and a black channel principle for safety-relevant messages, and a second field bus network of the two field bus networks uses a second safety protocol, different from the first safety protocol, and the black channel principle for the safety-relevant messages, the bridging field bus module comprising:

• a coupling element, which is designed to detect a safety-relevant message received from the first field bus network on the field bus bridging module,
• wherein the bridging field bus module is designed to receive the safety-relevant message corresponding to the first safety protocol from the first field bus network, convert the detected safety-relevant message received from the first field bus network into a first and a second safety-relevant message, each corresponding to the second safety protocol, compare the first and second safety-relevant messages with each other, and output at least one of the first and second safety-relevant message to the second field bus network depending on a result of the comparison.