Principle of 24V wiring
19
Siemens Building Technologies
007831_a_en_--.doc
Fire & Security Products
03.2004
5
Principle of 24V wiring
Standard power supply ’FC/FT’
B2F020
+
-
Mains
K1
2
1
+
6
5
-
3
-
4
+
2
1
+
6
5
-
3
-
4
+
FC700A
7
6
E3C011
-
-
K1
5
4
+
+
3
2
+
+
16
15
14
13
20
19
18
17
12V
12V
8
9
10
X17
K7
F1
F2
X34
X33
X31
X32
K7
F1
F2
Y34
Y33
Y31
Y32
Supply modules
Programming terminals 'K7' as
Output:
= 0 -Resistors Y31+Y32+Y33+Y34
Ω
Battery
max. 27Ah
B3Q700 (FC)
B3Q700 (FC)
B3Q700
(FT)
B3Q700
(FT)
Plug-in-terminals K7
Input:
= 0 -Resistors X31+X32+X33+X34
Ω
Programming terminals 'K7' as
Plug-in-terminals K7