What 127 CIP connections and 2 MB memory mean for your safety network
The Omron NX-SL5500 is a safety CPU running CIP Safety on EtherNet/IP, supporting up to 127 CIP connections with 2 MB of memory. That connection count sets the ceiling for how many safety I/O nodes, light curtains, and other CIP Safety devices can talk to this controller on one network — useful for a multi-station machine where each zone needs its own safety logic.