Bosch B6512 Installation Manual page 80

80 en | System wiring diagrams
Maximum cable lengths
Follow these rules when wiring the SDI2 bus:
–
–
–
Cable capacitance
pF/ft
< 17
18
19
20
21
22
23
24
25
26
Table 18.9: Maximum cable length
Notice!
Use unshielded cable only.
Maximum capacitance of 140nF (140,000 pF) per system. Contact the wire manufacturer for
the capacitance ratings of the wire being used.
2018.07 | 16 | F.01U.287.180
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:
Overall cable length
ft m
7500 2286
7500 2286
7350 2240
7000 2134
6666 2032
6363 1939
6086 1855
5800 1768
5600 1707
5385 1641
Cable capacitance
pF/ft
27
28
29
30
31
32
33
34
35
36
Installation Manual
Control Panels
Overall cable length
ft m
5185 1580
5000 1524
4828 1472
4700 1433
4516 1376
4400 1341
4242 1293
4100 1250
4000 1219
3800 1158
Bosch Security Systems, Inc.