Properties Of The Serial Interface; Rs 232C Interface Of The Cp 340-Rs 232C - Siemens SIMATIC CP 340 User Manual

Product Description

1.4 Properties of the serial interface

1.4 Properties of the serial interface
Introduction
Three module variants of the CP 340 are available, each having a different interface type
that is suitable for different communication partners. For point-to-point connections between
the CP 340 and a communication partner, Siemens offers standard connecting cables in
various lengths.
1.4.1 RS 232C interface of the CP 340–RS 232C
Features
The RS 232C interface is a voltage interface used for serial data transmission in compliance
with the RS 232C standard.
Type:
Front connector:
RS 232C signals:
Max. transmission
rate:
Max. cable length:
Standard:
EIA-RS 232C
Degree of protection:
18
Voltage interface
9-pin sub D male connector with screw-locking
TXD, RXD, RTS, CTS, DTR, DSR, RI, DCD, GND;
all isolated from the S7-internal power supply
19.2 kbps (3964(R) procedure)
9.6 kbps (ASCII driver, printer driver)
15 m, cable type LIYCY 7 x 0.14
DIN 66020, DIN 66259
CCITT V.24/V.28
IP 00
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03