Siemens SIMATIC TI500 Especificaciones descargar pdf (Pagina 281)

Upgrading Existing Series 500 Installations

C-22

SIMATIC 545/555/575 System Manual

RS-485/RF I/O Channel Converter (continued)

Use the following instructions to install cables for the PPX:505–6860:

NOTE: Since 545–1104, –1106, 555–1103, –1104, –1105, –1106 and

575–2104, –2105, –2106 CPUs use RS-485 cabling, the RS-485/RF I/O

channel converter is only needed if you are connecting the CPU to an RF

remote base. The CPU can be connected directly to an RS-485 remote base.

1. Use an RS-485 cable to connect the CPU’s RS-485 I/O port to the

converter’s RS-485 I/O port.

The cable should be as short as possible. You cannot connect any other

devices on this RS-485 cable; it is not possible to operate an RS-485 I/O

link with an RF converter and RF link. Notice that the connection

requires two twisted, shielded pairs with 9-pin, subminiature, male

D-connectors at each end, rather than the single pair cable that is used

for an RS-485 Series 505 remote I/O channel.

Suggested cable types include the following:

Alpha #5472 2TP w/shield 24 AWG

Belden #9502 2TP w/shield 24 AWG

Table C-4 shows the pinout specifications for the cable that connects

from the CPU to the RS-485/RF I/O channel converter. Pair like-named

signals 3 and 8, and 4 and 9.

Table C-4 Pinout Specifications

CPU

Connector Pin

Module

Connector Pin

Description

5 5 Ground (Shields)

3 3 D485–

4 4 RTS485–

8 8 D485

9 9 RTS485

Cabling

1 2 ... 276 277 278 279 280 281 282 283 284 285 286 ... 321 322

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Siemens SIMATIC TI500 Especificaciones Pagina 281