SIMATIC DP, spare part, E-coding plug (metal) for fail-safe distributed I/O ET 200, IP 65/67, 5-pole, M12 1 unit per packing unit Coding plug for saving the fail-safe address. This enables automatic and central assignment of the F-address from the engineering. In case the module has to be replaced, all the user has to do is plug the connector into the new module.