4.3
The connection mode of bus RS485 and terminal resistor:
When communication bus RS485 is connected in star line, connect an
120
Ω
resistor to the two loads at the farthest end
.
At that time
,
the input and
output resistors are not so matched, nor meeting the operation requirement of
RS485 industry standard
,
which can easily cause operation out of control.
Thus
,
it is recommended to use RS485 code distributor
.
If the connection in series
or daisy connection is used, the resistor at
the output end is 120
Ω
,
then
,
an 120
Ω
resistor should be connected to the load
at the farthest end
.
In this way, the input and output resistors can match better
.
Connection diagram of star code distributor
28
Summary of Contents for GS-PTZ-1010
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