ADTRAN 1181001L1 Installation And Maintenance Practice

ADTRAN 1181001L1 Installation And Maintenance Practice Manual pdf 30 page image

Total Access 3000 23-Inch Chassis Installation and Maintenance Practice24 61181001L1-5E2. Using the wire-wrap tool, connect the shielded, twisted pair interconnect wire to theRS-485 wire-wrap header, P2, on the host Total Access 3000 backplane. Connect the twoconductors to the A and B “Out” pins, and the shield or drain wire to the “Out” groundpin.3. Run the interconnect wire to the backplane of the first client shelf. Using the wire-wraptool, connect the two conductors and ground of the interconnect wiring to the RS-485wire-wrap header, P2, on the backplane of the client shelf. The two conductors will bewired to the A and B “In” pins, and the ground or shield wire will be cut withoutconnecting to the ground pin. Note that only one end of the grounding wire should beconnected between the two shelves. Take care to connect the A pins of each shelf together,and the B pins together. Do not cross the polarities.4. If there are more shelves to be connected, repeat steps 1 through 3 for each shelf to beadded to the chain. Disregard the designation of host and client for additional shelves.Each shelf after the first will be a client shelf on the daisy chain. It is important to notethat there is only one shelf designated as host on any daisy chain of up to 32 shelves andthat the host is on the end of the chain.Figure 11 illustrates the connecting of the RS-485 bus between shelves.Figure 11. Total Access 3000 Interbank ConnectionsP2IN OUTRS485A B A BP2IN OUTRS485A B A BClient Chassis32Client Chassis31Client Chassis2UP TO 32 CHASSISClient Chassis1 P2IN OUTRS485A B A BP2IN OUTRS485A B A B