InBio160/260/460 Pro Access Control Panel
User Manual
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connected by means of bus cascade instead of in a star form, to achieve a better shielding effect by
reducing signal reflection during communications.
2.
A single 485 bus can be connected with 63 access control operator panels at most, but preferably
should be connected with less than 32.
3.
To eliminate signal attenuation in communication cables and suppress interference, if the bus is
longer than 300 meters, one 120ohm resistance is usually inserted between the first and last access
control operator panels on the RS485 bus.
4.
For this access control operator panel, putting place 8 of the DIP switch to the ON position is
equivalent to parallel connection of one 120ohm resistance between the 485+ and 485- lines. As
shown in the figure below, put place 8 of the DIP switches of the first and last control operator panels
to the
ON
position.
Figure 4-2 RS485 Communication System Networking
DIP Switch Settings
4.4
This part introduces how to set the RS485 address setting, factory setting and terminal resistance setting
of the control panel through the DIP switch.
