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Integrated Technical Vision
http://www.itvsystems.com.ua
RS-485 Interface
RS-485 Interface is used for networking of the system components - PC and
panels. The range of RS-485 bus is up to 1200 meters. The number of devices in
one bus segment is up to 32.
RS-485 port is protected against overvoltage (60 V) and crosspolarity.
The unshielded four-wire cable may be used for RS-485 wiring. For maximal range
of 1200 meters please use 0.4 mm2 cross section wire. 0.2 mm2 cross section
wire will provide the range of 500 meters.
On the first and the last panel in the dropline short jumpers S3, S4 and S6, which
connect loading resistors:
Take care of proper grounding of all panels in the network.
RS485 cables are connected to +A and B- GND and +EB contacts.
Connect wires of one color always to the same terminal, for example blue-colored wire
always connect to terminal A.
RS485
RS485
RS232
LNET
loading is on
loading is on
black
yellow
blue
red
S3
S6
B-
GND
+EB
|TMP
A+
X2
Wiring
Содержание NDC-F18
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