Siemens SIMATIC S7-400 Configuration And Use Manual page 84

Configuration Variants of the S7-400
Component
PROFIBUS bus cable
Programming device cable
PROFIBUS components
e.g. PROFIBUS bus terminal
RS 485 repeater
Programming device (PG) or PC
with the STEP 7 software pack-
age
Fan subassembly
(for special areas of application)
6-4
Function
PROFIBUS bus cables connect
CPUs and programming devices.
Programming device cables con-
nect a CPU with a programming
device.
PROFIBUS components con-
nects an S7-400 to other
S7-400s or programming de-
vices.
The RS 485 repeater boosts
data signals on bus lines and
couples bus segments.
STEP 7 is used to configure, as-
sign parameters, program and
test the S7-400.
The fan subassembly ventilates
modules in special applications;
it can be operated with or without
a filter.
Automation System S7-400 Configuration and Use
Image
A5E00442711-02