ICP-CC488 | Installation Guide | 14.0 Zone Information EN | 57
Bosch Security Systems, Inc. | 12/08 | F01U089457-02
This configuration is suitable only for
normally-closed (N/C) contacts. If
normally-open (N/O) contacts are used,
as is the case with most smoke
detectors, a short circuit on one zone
activates both zones connected in
parallel.
If you require N/O contacts when using
split EOL resistors, refer to Figure 12 and
Figure 13 on pages 57 and 58 for
information on how to connect N/O
contacts.
Figure 10: Split EOL Resistors Using N/C
Contacts
1
9
2 9
4
9
3
9
5
10
8
10
6 10
7
10
1 – Zone 1
2 – Zone 2
3 – Zone 3
4 – Zone 4
5 – Zone 5
6 – Zone 6
7 – Zone 7
8 – Zone 8
9 – 3K3
10 – 6K8
Figure 11: Split EOL Resistors with Tamper
Circuit
1
4
5
6
3 2
1
4
1 – Tamper
2 – Zone 1 3K3
3 – Zone 5 6K8
4 – 1K
5 – Zone 1
6 – +12V
Figure 12: Split EOL Resistors Using One N/O
Contact
2
1
3
4
5
6
7
8
1 – +12 V
2 – Zone Input
3 – Zone
4 – N/C
5 – EOL 3K3
6 – EOL 6K8
7 – EOL 4K7
8 – N/O
