CHANNEL 7L7388 - Caterpillar

Illustration 1 g00637726
Connection Points For The Data LinkThere are three serial data links. The preceding illustration shows the connection points at the GSC. The data links provide the means for the GSC in order to communicate with other devices. The data links are defined in the following list:ALM Data Out - This serial data link is a single directional link. The GSC uses this data link for one-way communication with optional Alarm Modules (ALM) or the optional Customer Interface Module (CIM). The data link for the ALM consists of a single wire that connects the GSC (connector contact 35) to an ALM or CIM. A return connection between the GSC and the module is also required. For more information, see Systems Operation, "Alarm Modules" or Systems Operation, "Customer Interface Module".RDM Data Out - This serial data link is a single directional link. The GSC uses this data link for one-way communication with the optional Relay Driver Module (RDM). The RDM data link consists of a single wire that connects the GSC (connector contact 36) to the RDM. A return connection between the GSC and the module is also required. An RDM is used in conjunction with the optional Customer Communication Module (CCM). For more information, see Systems Operation, "Relay Driver Module". CAT Data Link - This serial data link is bidirectional. The GSC uses this data link for two-way communication with the optional CCM. The CAT data link consists of a cable that connects the GSC (connector contacts 19 and 20) to the CCM. For more information, see Systems Operation, "System Communication Module (Customer)".