Siemens SIMATIC TI500 Especificaciones descargar pdf (Pagina 182)

6-17

Cabling and Wiring the System

SIMATIC 545/555/575 System Manual

To connect a trunk line cable to a terminal block, follow the steps below.

Refer to Figure 6-9.

1. Loosen three terminal screws on the terminal block.

2. Install the terminal lugs at the cable end onto the terminal screws.

NOTE: Throughout your installation, make connections carefully to prevent

wire mismatches. For example, if you have already connected one line, such

as a drop line, to the terminal block, when you attach the trunk line you

must ensure that the wires of the second set of terminal lugs match with

those of the first set of terminal lugs. That is, if a wire at a bottom terminal

screw is blue, the wire on the screw directly above it must also be blue.

3. Tighten the screws on the terminal block.

4. 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.

NOTE: 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).

Trunk line

Terminating

Resistor

Figure 6-9 Connecting Trunk Line to Terminal Block

Connecting Trunk

Line Cables

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Siemens SIMATIC TI500 Especificaciones Pagina 182