70
en | Preparing the Wiring
AutoDome Easy II
F.01U.164.478 | 2.0 | 2010.02
Installation Manual
Bosch Security Systems, Inc.
The following figure illustrates the connections for RS485
connections.
Figure 8.5
Connections for RS485 Operations
CAUTION!
Bosch recommends that multiple RS485 connections be
arranged as a connected series of point-to-point (multi-
dropped) nodes, as a line or as a bus. It is
not
recommended to
arrange RS485 connections as a star, ring or as a multiple-
connected network. Star and ring topologies may cause signal
reflections or excessively low or high termination impedence.
Wire Type
2-wire Shielded Twisted Pair
Distance
1219 m (4000 ft)
Maximum Baud Rate
57.6 kb
Gage
0.511 mm (24 AWG)
Impedance
120 Ω
AutoDome Easy II
Head End
Ref.
#
Wire
Color
Ref. # Connection
1
C (-) (Biphase)
White/Green
2
C (+) (Biphase) Yellow
3
Ground
White/Orange
8
Head End
RS485
4
RS485 (+)
Blue
9
Data (+)
5
RS485 (-)
White/Blue
10
Data (-)
6
Reserved
Violet
11
Ground
7
Reserved
Gray
