Mechanical and electrical configuration
X20 system User's Manual 3.10
93
3.19 X20 system protection
The protection for the X20 system depends on the supply concept.
3.19.1 Potential groups
Using the X20BM01 bus module and organizing the power supply bus modules accordingly allows various potential
groups to be implemented (e.g. for input groups or various power circuits for the outputs).
U1/24 VDC
U2/24 VDC
X2X
Link
I/O
I/O
10 A slow-blow
10 A slow-blow
BR
93
00
+
B
M
01
1 A slow-blow
1)
PS
21
00
+
B
M
01
I/O
10 A slow-blow
PS
21
00
+
B
M
01
Figure 33: Protecting various potential groups
1) Recommended for line protection.
3.19.2 Supply via bus transmitter
The bus transmitter has an integrated internal I/O supply feed. This saves a power supply module for the last
potential group.
Keep in mind: this potential group is separated from the rest of the potential groups by an I/O module with the
bus module.
U1/24 VDC
U2/24 VDC
X2X
Link
I/O
I/O
I/O
BR
93
00
+
B
M
01
PS
21
00
+
B
M
01
I/O
m
od
ul
e
+
BM
01
BT
9x
00
+
B
M
11
10 A slow-blow
10 A slow-blow
1 A slow-blow
1)
10 A slow-blow
Figure 34: Protection when supplied via bus transmitter
1) Recommended for line protection.
Summary of Contents for X20 System
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