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Cabling and Wiring the System

6-32

SIMATIC 545/555/575 System Manual

6.4 Connecting Modems

545, 555, and 575 CPUs can communicate through Port 1 (RS-232) to an

operator interface or programming station through a dedicated line or

dial-up phone modems. Dedicated line operation is a line used exclusively to

connect the modems. Dial-up phone operation connects the modems by

telephone lines. Refer to Figure 6-22 for a typical configuration.

RS-232

(9-Pin Port

for

545/555)

(25-Pin Port

for

575)

CPU

Programming

Device

Modem Modem

Connect in accordance

with the modem manual

545/555 CPUs require

25-9 pin female adapter,

INMAC 359–4 (or equivalent)

Cable

(2462553–0001)

Cable

(2462553–0001)

25-9 pin female adapter,

INMAC 359–4 (if needed)

EIA RS-232C

connectors

EIA RS-232C

connector

Figure 6-22 Modem Configuration

NOTE: The modems must provide an EIA RS-232C DTE interface to the

controller and operator interface and must have a built-in error correction

capability. Although the controller supports both full- and half-duplex

communications, TISOFT only supports full-duplex communications.

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Siemens SIMATIC TI500 Spezifikationen Seite 197