Siemens FS720 Quick Reference For Components / Pin Assignment page 59

10.2.6 X11 / X21 detector line loop 1 (module 2/3)
PIN Designation
4 LOOP1_2–
3 LOOP1_2+
2 LOOP1_1–
1 LOOP1_1+
Building Technologies
Fire Safety & Security Products
1 Configured as output
2 Configured as input
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
X11 / X21
LOOP1_2- -
LOOP1_2+ +
LOOP1_1- -
LOOP1_1+ +
Comment
The technical term LOOP 1 applies to both loops on connectors X11 and X21
One loop or two stubs can be connected.
Periphery board (4 loops) FCI2004-A1
Comments for X11
Connection – 1st loop
Connection + 1st loop
Connection - 1st loop
Connection + 1st loop
4
3
2
1
Comments for X21 *
Connection – 3rd loop
Connection + 3rd loop
Connection - 3rd loop
Connection + 3rd loop
A6V10210410_a_en_--
18.05.2009
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