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| Illustration 1 | g00714328 |
There are three serial data links on MUI and PEEC engines. Ilustration 1 shows the connection points at the GSC. The data links provide the means for GSC to communicate with other devices. The data links are described in the following paragraphs.
ALM Data Output - 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 ALM Data Link consists of a single wire that connects the GSC (connector contact 35) to an ALM or a CIM. A return connection (ground) is required between the GSC and the module. See Systems Operation, "Alarm Modules" for more information about the ALM Data Link. Also, see Systems Operation, "Customer Interface Module"for more information on the ALM Data Link.
Spare Data Output - This serial data link is single directional. The GSC uses this data link for one-way communication with the optional customer equipment or the optional Relay Driver Module ("RDM"). If an RDM is used, the RDM data link consists of a single wire that connects the GSC (connector contact 30) to the "RDM". Also, a return connection (ground) that is between the GSC and the module is required. An RDM is used in conjunction with the optional Customer Communication Module (CCM). For more information, see the topic Systems Operation, "Relay Driver Module (RDM)".
CAT Data Link - This serial data link is bidirectional. The GSC uses this data link for two-way communication with the optional Customer Communication Module (CCM). The CAT Data Link uses a shielded twisted pair cable that connects the GSC (connector contact 19 and connector contact 20) to the CCM. For more information, see the Systems Operation, "Customer Communication Module".
CAT Data Link - FOR EUI ENGINES ONLY This serial data link is bidirectional. The GSC uses this data link for two-way communication with the engine ECM. The optional Customer Communication Module (CCM) also connects to these contacts. The CAT Data Link uses a shielded twisted pair cable that connects the GSC (connector contact 19 and connector contact 20) to the engine ECM.