Properties Of The Serial Interface; Rs 232C Interface Of The Cp 341-Rs 232C - Siemens Simatic S7-300 CP 341 User Manual

Product Description

1.4 Properties of the Serial Interface

1.4 Properties of the Serial Interface
Three module variants of the communication processor are available, each having a different
interface type that is suitable for different communication partners.
The interfaces of the module variants are described in the following sections.
1.4.1

RS 232C Interface of the CP 341-RS 232C

Definition
The RS 232C interface is a voltage interface used for serial data transmission in compliance
with the RS 232C standard.
Properties
The RS 232C interface has the following attributes and is in compliance with the following
requirements:
Type:
Front connector:
RS 232C signals:
Max. baud rate:
Max. cable length:
Standard:
24
www.gkbpx.com
Voltage interface
9-pin subminiature D male connector with a screw-type fitting (compatible
with the 9-pin COM port (PC/PG))
TXD, RXD, RTS, CTS, DTR, DSR, RI, DCD, GND; all isolated against the
S7-internal power supply (S7-300 backplane bus) and the external 24 V DC
supply
115.2 kbaud
15 m, cable type LIYCY 7 x 0.14 (6ES7902-1Ax00-0AA0)
DIN 66020, DIN 66259, EIA-RS 232C, CCITT V.24/V.28
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
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Manual, 09/2008, A5E02191071-01