Siemens QUADLOG, Installation And Service Instruction, Page: 33 / 66

SD39RIO-1 INSTALLATION
January 2001
2-21
To connect a W2040 IOBUS cable between a terminal block and a Remote I/O Rack:
1. Determine the length of W2040 cable needed to connect from the terminal block location to the
appropriate IOBUS connection point on the Remote I/O Rack’s backplane. Allow slack for cable
stripping, dressing, tagging, and strain relief at each end.
2. At the user-supplied terminal block, provide strain relief for the W2040 cable end. Connect the W2040
cable conductors (wires) to the terminal block as shown in Figure 2-15. Wire stripping and color code
information for doing this are provided in Table 2-1 and Figure 2-14 respectfully.
3. At the appropriate IOBUS screw terminals on the Remote I/O Rack’s backplane (Figure 2-4), provide
strain relief for the W2040 cable end by securing it to one of the rack’s tie points (Figure 2-5). Connect
the W2040 cable conductors (wires) to the appropriate screw terminals. Tighten screw terminals by
applying 78 in oz (0.55 Nm) of torque. Wire stripping and color code information for making
connections are provided in Table 2-1 and Figure 2-14 respectfully.
4. Tag each W2040 cable end as needed for identification.
To connect a W2040 IOBUS cable between two Remote I/O Racks:
1. Determine the length of W2040 cable needed to connect from the first Remote I/O Rack to the second
Remote I/O Rack. Allow slack for cable stripping, dressing, tagging, and strain relief at each end.
2. At the appropriate IOBUS OUT screw terminals on the first Remote I/O Rack’s backplane (Figure 2-4),
provide strain relief for the W2040 cable end by securing it to one of the rack’s tie points (Figure 2-5).
Connect the W2040 cable conductors (wires) to the screw terminals as shown in Figure 2-16. Tighten
screw terminals by applying 78 in oz (0.55 Nm) of torque. Wire stripping and color code information for
making connections are provided in Table 2-1 and Figure 2-14 respectfully.
3. At the appropriate IOBUS IN screw terminals on the second Remote I/O Rack’s backplane (Figure 2-4),
provide strain relief for the W2040 cable end by securing it to one of the rack’s tie points (Figure 2-5).
Connect the W2040 cable conductors (wires) to the screw terminals as shown in Figure 2-16. Tighten
screw terminals by applying 78 in oz (0.55 Nm) of torque. Wire stripping and color code information for
making connections are provided in Table 2-1 and Figure 2-14 respectfully.
4. Tag each W2040 cable end as needed for identification.