Installing
5.3 Mounting modules onto the rail
S7-300, CPU 31xC and CPU 31x: Installation
5-8
Operating Instructions, Edition 08/2004, A5E00105492-05
Installation steps
The various steps in module installation are explained below.
1.
Plug the bus connectors into the CPU and SMs
/ FMs / CPs / IMs.
Except for the CPU, each module is supplied
with a bus connector.
•
Always start at the CPU when you plug in
the bus connectors. Remove the bus
connector from the "last" module of the
assembly.
•
Plug the bus connectors into the other
modules.
The "last" module does not receive a bus
connector.
C PU
2.
Add all modules to the rail in the specified order
(1), slide them up to the module on the left (2),
then swing them down (3).
CPU
2
1
3
3.
Screw-tighten the modules.
C PU
See also
Configuring an S7-300 with ungrounded reference potential (not CPU 31xC) (Page 4-17)