Installation Instructions

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:
– The SDI2 bus requires the use of unshielded cable from 12
AWG to 22 AWG.
– 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:
Cable
capacitance
Overall cable
length
Cable
capacitance
Overall cable
length
pF/ft ft pF/ft ft
< 17 7500 27 5185
18 7500 28 5000
19 7350 29 4828
Control Panels System wiring diagrams | en 43
Bosch Security Systems, Inc. 2015.09 | 08 | F.01U.287.185