Control Panels System wiring diagrams | en 103
Bosch Security Systems, Inc. Installation Manual 2018.07 | 10 | F.01U.303.996
Callout á…³ Description
1 á…³ Control panel
2 á…³ SDI2 device (module or keypad)
3 á…³ Daisy chain wiring
4 á…³ Single-level T-tapped wiring
5 á…³ 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:
– The SDI2 bus requires the use of unshielded cable from 12 AWG to 22 AWG (0.65 mm to
2 mm).
– Refer to the SDI2 device or keypad documentation for the allowable maximum distance
from the control panel.
– Maximum overall cable lengths are listed in the following table:
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