Siemens FS20 Mounting & Installation page 87

5.4.2.7 X12 / X22 detector line loop 2 (module 2/3)
Pin Designation
4 LOOP1_2–
3 LOOP1_2+
2 LOOP1_1–
1 LOOP1_1+
Building Technologies
Fire Safety
Description
↑ Loop 1 / ↑ stub 2 (–)
Loop 1 / stub 2 (+)
Loop 1 / stub 1 (–)
Loop 1 / stub 1 (+)
Admissible cable cross-section: 0.2...1.5 mm²
Loop number without loop extension
1
X12 / X22
-
LOOP2_2-
LOOP2_2+
+
LOOP2_1- -
LOOP2_1+
+
● The technical term LOOP 2 applies to both ↑ loops on connectors X12 and
X22.
● One loop or two stubs can be connected.
Mounting and installation of the compact control panels
X12
Connection – 2nd Loop
Connection + 2nd Loop
Connection – 2nd Loop
Connection + 2nd Loop
4
3
2
1
Periphery board (4 loops)
X22
1
Connection – 4th Loop
Connection + 4th Loop
Connection – 4th Loop
Connection + 4th Loop
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