Siemens S7-400 Rules for the Arrangement of Modules, Arrangement of the Modules

Installing the S7-400

2.12Rules for the Arrangement of Modules

Arrangement of the Modules

You only need to observe two rules for rack mounting of the modules:

•In all racks, the power supply module must always be inserted on the extreme left (beginning with slot 1). In the UR2-H from slot 1 in both segments.

•The receive IM in the ER must always be inserted on the extreme right. In the UR2-H at slot 9 once per segment.

Note

Establish whether there are additional regulations applying to all modules not described in this manual.

The following table shows which modules can be used in the different racks:

Table 2-2	Modules in the different racks
Modules		Racks		Racks
		UR1, UR2	UR1, UR2	UR2-H	CR2,	ER1, ER2
		UR2-H as	as ER	as ER*	CR3
		CR
Power Supply Modules		D	D	D	D	D
CPUs		D			D
Send IMs		D			D
Receive IMs			D	D		D
Signal Modules		D	D	D	D	D

*No IM 463-2, no adapter module, no power supply module along with the IM 461-1.

Space Requirement of the Racks

In the S7-400 system, there are modules occupying one, two, or three slots (width 25, 50, or 75 mm). Refer to the technical specifications of the module under the keyword “dimensions” to see how many slots a module occupies.

The mounting depth of a rack fitted with modules is 237 mm maximum.

Automation System S7-400	Hardware and Installation	2-29
A5E00850741-01