Siemens SIMATIC ET 200SP Manuel - Page 13

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2.4

Properties of the interfaces

Interfaces of the CM PtP

The CM PtP has the following interfaces, which are connected by means of the associated

BaseUnit (see RS232 and RS422/485 interface of the communication module (Page 17) for

assignment):

● RS232 interface

● RS422/485 interface

2.4.1

Definition - RS232 interface

The RS232 interface is a voltage interface used for serial data transmission.

Properties - RS232 interface

The RS232 interface has the following properties and meets the following requirements:

Type

BaseUnit terminals

RS232 signals

Max. data transmission rate

max. cable length

Standard

CM PtP communication module (6ES7137-6AA00-0BA0)

Manual, 01/2013, A5E03790792-01

Voltage interface

Terminals connected to the electronics module (see RS232 and

RS422/485 interface of the communication module (Page 17) for

assignment)

TXD, RXD, RTS, CTS, DTR, DSR, RI, DCD, GND; all signals isolated

against the backplane bus and load voltage

115.2 kbps

15 m, cable type LIYCY 9 x 0.14

DIN 66020, DIN 66259, EIA-RS 232C, CCITT V.24/V.28

Product overview

2.4 Properties of the interfaces