Table of Contents
Advertisement
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
Hide quick links:
Advertisement
Table of Contents
