Bosch B9512G Installation And System Reference Manual page 99

Control Panels
You can wire modules via home run, daisy chain, or single level T-tap anywhere on the SDI2
bus.
MOD-2
MODULE RELEASE
MOD-1
PWR+/R PWR+/R 29 30
28 29
A/Y A/Y
olice olice
27 28
B/G B/G
ting ting
26 27
COM/B COM/B
ire ire
26 26
PWR+/R PWR+/R
A/Y A/Y 25 25
24 24
B/G B/G
COM/B COM/B 23 23
ZONEX ZONEX TAMPER TAMPER RESET RESET
ZONEX TMPR
Figure 18.25: SDI2_Wiring_Recommendations
Callout ᅳ Description
1 ᅳ Control panel
2 ᅳ SDI2 device (module or keypad)
3 ᅳ Daisy chain wiring
4 ᅳ Single-level T-tapped wiring
5 ᅳ Home run wiring
Notice!
There can only be a difference of 2 volts (maximum) between the AUX power terminals of the
control panel or power supply and the device for the modules and keypads to work properly
under all conditions.
Maximum cable lengths
Follow these rules when wiring the SDI2 bus:
–
Bosch Security Systems, Inc.
1
2
5
2
The SDI2 bus requires the use of unshielded cable from 12 AWG to 22 AWG.
Installation and System Reference Guide
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System wiring diagrams | en
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