Siemens SIMATIC TIWAY 1 Manual de usuario descargar pdf (Pagina 16)

TIWAY 1 Overview

1-5

TIWAY 1 TI505 NIM User Manual

The

TI505 NIM provides

redundant TIW

Y I communication ports. Each of the following

models

supports a specific type of network communication media.

PPX: Number Port A Port B

PPX:505-7339 Local Line Local Line

PPX:505-7340 RSĆ232ĆC/423 RSĆ232ĆC/423

The

RS-232-C/423 media interface is configured as Data T

erminal Equipment (DTE) and

used to connect the NIM to

Data Communication Equipment (DCE) for operation with

modems. This interface uses RS-423 drivers and receivers and operates at RS-423-A

signal levels (+5 or –5 volts). These levels are also RS-232-C compatible. The pin

assignments

for the RS-232-C port are given in Chapter 2.

The

Local Line interface is a differential line port for use with shielded twisted pair cable.

The Local Line interface provides line isolation and high noise immunity for

installations

up to 10,000 feet (25,000 feet depending on system loading

and baud rate

selection). The Local Line interface is recommended for applications where electrical

noise

may be a problem.

Redundancy is supported for either choice of media.

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Siemens SIMATIC TIWAY 1 Manual de usuario Pagina 16