Section 3: Mapping data from the NX-CSG320 to EtherNet/IP 1. At the top of the Multiview Explorer, select the Communications Gateway device, and then double click IO Map . 2. On the IO Map, enter variable names in the NX-CSG320 that match the names shown on the left in the NX-SL5700. It is not required that the names match, but for ease of programming, it is recommended that they do match. This step connects the Tags it the NX-SL5700 Safety CPU to Tags in the NX-CSG320 gateway.