
6-15
Cabling and Wiring the System
SIMATIC 545/555/575 System Manual
5. Tighten terminal block screws.
6. If you are not using another terminal block, install a terminating
resistor across the terminal screws securing the cable wires with the
color-coded insulation jacket. See Figure 6-8.
NOTE: The terminating resistor value depends on the type of cable being
used. See Table 6-3.
Drop line from CPU or RBC
Terminating
Resistor
Figure 6-8 Adding a Terminating Resistor
Table 6-3 Terminating Resistors
Cable Type Resistor Value Color Code
Belden 9860 120 Ohms, 5%, 1/4 W Brown-Red-Brown-Gold
Belden 9271 120 Ohms, 5%, 1/4 W Brown-Red-Brown-Gold
Belden 9182 150 Ohms, 5%, 1/4 W Brown-Green-Brown-Gold
Kommentare zu diesen Handbüchern