Advant Controller 70, S800 I/O Stations, Advant Controller 400 Series, and PC based operator station can be connected to the twisted pair media. The twisted pair modems are integrated within the Advant Controller 70 and the S800 I/O Station units. To connect an Advant Controller 400 Series and PC based operator station, the external modem TC512/TC516 is needed. Both single and redundant twisted pair media can be used. For Advant Controller 110, the unit CI627 is used and for Advant Controller 160 the unit CI627 and CI631 are used. Both CI627 and CI631 has two integrated twisted pair modems. The Advant Fieldbus 100 cables are connected to removable terminal headers which are connected to the TC512/TC516 modems, the Advant Controller 70 or the S800 I/O Station. This allows the station or modem to be removed from the Advant Fieldbus 100 without disconnecting other nodes on the fieldbus.
When connecting the twisted pair bus
cable to a modem both an incoming (from previous station) and an outgoing bus cable (to next station) are connected to the bus cable connector on the modem. This can be performed using the TC505 (see Chapter , Installation and Start-up) or by connecting the bus cables directly to the modem connector. To the two communication interfaces located first and last on the bus, only one bus cable, incoming or outgoing, is connected. The bus cable for these two stations must be terminated with a twisted pair bus termination. The minimum distance between two stations (modems) on the twisted pair cable is 4 meters (13 feet).
CI527 twisted pair connector
Table 39 shows the fieldbus connection assignments.Pin 3 is to be used when external capacitive decoupling of the twisted pair cable shield is used for instance with TC506 or with the TX505 For more information, see chapter and chapter . Pin 4 is to be used when no external capacitive decoupling of the twisted pair cable shield is used, for instance when TC505 is used For more information see chapter . Connection of Twisted Pair Cable to Modem TC512/TC516 The modem TC512/TC516 connects to the Advant Fieldbus 100 via the terminals on its front, connector X3. When redundant media is used two TC512/TC516 modems are needed, one for each bus line to be connected to the communication interface. Figure 64 views the connection details for connection of a twisted pair bus cable to the modem TC512/TC516.
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