Communications
AC-215IP Hardware Installation Manual 31
The RS-232 connection can only connect a single access control panel to the
computer.
The distance between the computer and the access control panel must be no
more than 150 feet (50 meters).
If the baud rate is increased to 57600 or beyond, the distance must be no
more than 30 feet (10 meters).
6.1.2 RS-485 Connection to the Computer
Set the J1 switch to the RS-485 position.
Up to 32 access control panel's can be linked together and connected to a
single communication port on the computer.
Use the RS-485 interface for situations where there are multiple controllers
connected. The serial port used to control the access control panel is assigned
within the AxTraxNG™ software.
The access control panel supports the two-wire RS-485 interface. RS-485
interface enables the distance between the Access control panel and PC to be
extended up to 4000 feet (1219) meters. The data line wiring must be in daisy
chain formatting with one control unit following another. The first Access
control panel connecting to the PC must use the MD-14 RS-485 to RS-232
adaptor.
6.1.3 Daisy Chaining
Daisy chaining allows many panels to connect to the computer along a single
serial line.
The first panel is connected directly to the computer and a second panel
connects to the first panel. Additional panels connect in the same way, one
after another.
Figure 19: Daisy Chaining
RS-485
AC-215IP #3
RS-485
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