Siemens SIMATIC TI500 Uživatelský manuál stáhnout pdf (Strana 28)

Network Installation

2-12

TIWAY I Gateway User Manual

2.3 Network Media Installation — RS-232-C Modem Interface

The

physical layer in TIW

Y I provides a modem interface for synchronous

or asynchronous communications at data transmission rates up to 1

15.2 K

bps. The modem interface provides standard signals for control of two-way

alternate data transmission using both half and full duplex modems.

The modem interface is a standard T

ype E DTE configuration as defined in

the EIA RS-232-C standard. This interface uses a male 25-pin D-type

connector plug on the communication cable. The pin assignments are listed

in T

able 2-2.

able 2-2 RS-232-C Connector Pin Assignments

Pin No. Description

1 Protective Ground

2 Transmit Data

3 Receive Data

4 Request to Send (RTS)

5 Clear to Send (CTS)

6 Data Set Ready (DSR)

7 Signal Ground

8 Receive Line Signal Detector/Data Carrier Detect (RLSD/DCD)

15 Transmitter Signal Element Timing

17 Receiver Signal Element Timing

20 Data Terminal Ready (DTR)

Data

ransmission

Characteristics

RS-232 Pin

Assignments

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 93 94

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Siemens SIMATIC TI500 Uživatelský manuál Strana 28