Controlling The Autodome Via The Rs485 Protocol - Bosch AutoDome 600 Series Installation Manual

AutoDome 600 Series Analog PTZ Camera
Figure 5.5 Position of CPU Switch for RS232 Operation (camera module not shown for clarity)
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2
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Note: To access the CPU switch you must remove the bubble from the pendant housing. Refer
to the procedure on Page 83.
5.4.3

Controlling the AutoDome via the RS485 Protocol

2-wire (shielded), half-duplex, differential, multi-drop (32 nodes), 4000 ft cable limit)
RS485 is capable of controlling a true multi-drop network and is specified for up to 32 drivers
and 32 receivers on a single 2-wire bus. The AutoDome uses the 2-wire mode, although RS485
can be connected in a 2- or 4-wire mode.
NOTICE!
The wire shield must be tied to signal at both ends, if 2-wire twisted pair is used. After
connecting the wires for RS485 operation, make sure the slide switch on the main board to
the camera head is positioned toward the LEDs (default).
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 impedance.
Wire Type
Distance
Maximum Baud Rate
Gage
Wire Impedance
Slide Switch
Bosch Security Systems, Inc.
Switch Location
LEDs
RS232
CPU Module
2-wire shielded twisted pair
1219 m (4000 ft)
57.6 kb
0.511 mm (24 AWG)
120 W
Toward LEDs (factory default)
Installation Manual
Cable and Wire Standards | en
F.01U.215.782 | 1.0 | 2011.04
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