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KD-492 | 22320 | EN | X02
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3.2.3 Connections on the Backup-Box
The positions of the terminal strips or terminals inside the Backup-Box can be found in sec-
tion System components of the Backup-Box [P. 9].
Illustration 2: Terminal strips X1.B and X3.B as well as Miniature circuit breaker F1.B
X1.B terminal strip overview
Terminal
Function
1–3
AC line IN phase 1–3
4
AC line IN neutral conductor
5
AC line IN earthing conductor
6–8
AC line OUT phase 1–3
9
AC line OUT neutral conductor
10
AC line OUT neutral conductor – free
11
AC line OUT neutral conductor – free
12
AC line OUT earthing conductor
13
Earthing conductor to storage system
14
Earthing conductor to main earthing terminal
15
Potential-free signalling contact – closed in backup operation
16
Potential-free signalling contact – closed in backup operation
X3.B terminal strip overview
Terminal block
Terminal
Function
X3.B
1
Plus (positive) battery voltage
X3.B
2
Minus (negative) battery voltage
Control signal connection overview
Terminal strip:terminal
Wire colour
Function
X2.B:9
White
GND (earth)
F3.B
Brown
Supply voltage 24 V DC
K5.B:A1
Yellow
Digital output (DO) for emergency shutdown
K6.B:14
Green
Digital input (DI) for grid detection (backup supply
active)
