General Information

The network is made up of a number of control modules (sometimes called nodes) that are connected to each other via two communication cables. Each control module is individually powered and grounded and receives messages/commands via two the communication cables. In both networks (high and middle-speed sides), the control modules are connected to a number of different spurs. In the event of an open circuit those control modules beyond the open-circuit will not be able to communicate with other parts of the network. However, a failure in one of the spurs can lead to communication failure with one control module while communication in the rest of the same network is working.