A simple way to incorporate multiple CIM communication loops into a single global infrastructure. Keyscan CIM-Link is a TCP/IP companion module, which incorporates multiple CIM CAN Bus communication loops into a single global infrastructure. This promotes even greater global communication flexibility. Keyscan's CIM-Link module extends CAN Bus based ACU to ACU communication via a common LAN/WAN network. This maximizes system design options by expanding ACU to ACU functionality to multiple independent CAN Bus global networks utilizing common LAN/WAN (TCP/IP) infrastructure. Maximizes electrical isolation to earth ground providing tolerance against ground loops. Provides a myriad of communication diagnostics annunciated with on-board LEDs for quick and easy device-based troubleshooting. Uses Keyscan’s plug-on TCP/IP network adapter NETCOM2P/6P