Mechanical and electrical configuration
94
X20 system User's Manual 3.10
3.20 X2X Link supply
3.20.1 Extended and redundant X2X Link supply
The X2X Link remote backplane is supplied separately from the I/O points. This ensures that the remote backplane
doesn't fail if there is a power failure on the I/O side, for example with an emergency stop. After approx. 30 modules,
it is necessary to "refresh" with a power supply module for X2X Link.
To achieve increased supply security, it is possible to set up a redundant X2X Link supply. To do so, the necessary
X2X Link power must be determined and then covered by the corresponding quantity plus at least one additional
X2X Link power supply module. This guarantees the functionality of the remote backplane even if the X2X Link
supply fails.
Please note the following for the correct calculation:
•
To determine the necessary X2X Link power, calculate using 75% of the power supply module's rated
power during parallel operation.
Information:
This must be done for all power supply modules at the same time for a non-redundant X2X Link supply
or when completely turning the X2X supply of an X20 module block on/off.
3.20.2 Example for extended X2X Link supply
It is possible to set up potential groups through the use of different supplies for the power supply modules.
U1/24 VDC
U2/24 VDC
X2X
Link
X2X
Link
I/O
I/O
I/O
BR
93
00
+
B
M
01
PS
33
00
+
B
M
01
PS
21
00
+
B
M
01
10 A slow-blow
10 A slow-blow
1 A slow-blow
1)
1 A slow-blow
1)
10 A slow-blow
Figure 35: Example for extended X2X Link supply
1) Recommended for line protection.
The X20PS3300 power supply module supplies both the X2X Link and I/O; the X20PS2100 power supply module
only supplies the I/O.
Summary of Contents for X20 System
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