Siemens SIMATIC TI500 Especificaciones descargar pdf (Pagina 183)

Cabling and Wiring the System

6-18

SIMATIC 545/555/575 System Manual

Installing Series 505 Remote I/O Cables (continued)

The following procedure assumes you have connected one segment of trunk

line to a terminal block, and wish to add a second segment in order to

extend your installation. Refer to Figure 6-10.

1. Loosen the three terminal screws on terminal block A and install the

second set of cable terminal lugs onto the terminal block.

NOTE: Ensure that the wires of the second set of terminal lugs match with

those of the first set: e.g., if a wire at a terminal screw is blue, the second

wire installed on the same terminal screw must also be blue.

2. Tighten screws on terminal block A.

3. Loosen three screws on terminal block B.

4. Install the terminal lugs on the other cable end to the terminal screws

in terminal block B.

5. Tighten screws on terminal block B.

6. If you are not using another terminal block, install a terminating

resistor across the terminal screws that secure the cable wires with the

color-coded insulation. The terminating resistor value depends on the

type of cable being used, and must match the characteristic impedance.

See Table 6-3. A terminating resistor must be installed on the end

terminal block(s).

Refer to Chapter 9 for procedures to check for faulty cables.

Extending Trunk

Line Cables

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Siemens SIMATIC TI500 Especificaciones Pagina 183