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Design and Connection System
2.2
Peripheral modules
Housing
SIEMENS
Pos. Module
A
B
C
D
Figure 2-2
Front view (left) and rear view (right) of the 7XP204 housing for peripheral modules
2-4
The peripheral modules are accommodated in one or more 7XP204 housings. One
housing can hold up to 4 peripheral modules in any order.
Two angle brackets are required to fit the housing into a frame or cabinet.You can look
up the order number in chapter A.1 in the appendix.
The housing has a labelling strip inserted on its front for identification of the modules
contained in it.
The rear plate has cutouts for the connectors. The cutouts provided are sufficient for
the maximum degree of expansion. If the housing contains less modules, the cutouts
that are not required are closed by metal blanking plates.
An earthing area marked with an earth symbol has been provided at the housing rear.
At this area an earthing strip must be connected with two earthing screws in order to
ensure solid low-impedance earthing.
In addition, the housing bears a rating sticker with basic information.
SIPROTEC
7SS60
The connector allocation depends on the type of peripheral module and is shown in
section A.2.
D
C
20
40
20
40
20
X1
X1
X1
1
21
1
21
1
20
40
20
40
20
X2
X2
X2
1
21
1
21
1
B
A
40
20
40
X1
21
1
21
40
20
40
X2
21
1
21
7SS60 Manual
E50417-G1176-C132-A2
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